| Water Body Name: | Shag Slough (in Delta Waterways, northwestern portion) |
| Water Body ID: | CAR5100000020080820173715 |
| Water Body Type: | River & Stream |
DECISION ID |
50695 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Aldicarb |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70633 | ||||
| Pollutant: | Aldicarb | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Aldicarb. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for aldicarb, 6.33 ug/L, is one-tenth of the median lethal concentration (LC50 = 63.3 ug/L) for Lepomis macrochirus (Bluegill sunfish); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70634 | ||||
| Pollutant: | Aldicarb | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Aldicarb. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Department of Public Health archived advisory level for aldicarb is 7 ug/L. | ||||
| Guideline Reference: | CDPH Archived Advisory Levels for Drinking Water. Archived Advisory Levels are currently considered Notification Levels. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50697 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Aldrin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the zero samples exceed the water quality objective for COMM, zero of the zero samples exceed the water quality objective for MUN, and zero of the nine samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the zero samples exceed the water quality objective for COMM, zero of the zero samples exceed the water quality objective for MUN, and zero of the nine samples exceed the water quality objective for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70635 | ||||
| Pollutant: | Aldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Aldrin. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The CTR objective for aldrin to protect human health from the consumption of water and organisms is 0.00013 ug/L. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70651 | ||||
| Pollutant: | Aldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Aldrin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The criterion maximum concentration to protect aquatic life in freshwater for aldrin is 1.5 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70650 | ||||
| Pollutant: | Aldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Aldrin. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The criterion to protect human health from consumption of water and organisms for aldrin is 0.00014 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50700 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Aluminum |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 and using Table 3.1 of the Listing Policy. Under section 3.1, a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the two samples exceed the water quality objective for MUN, and zero of the two samples exceed the water quality objective for COLD. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the two samples exceed the water quality objective for MUN and zero of the two samples exceed the water quality objective for COLD, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70672 | ||||
| Pollutant: | Aluminum | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 2 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Aluminum. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California secondary maximum contaminant level for aluminum is 0.2 mg/L. | ||||
| Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR title 22 section 64449. | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 5/15/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 79514 | ||||
| Pollutant: | Aluminum | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 2 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Aluminum. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The National Recommended Water Quality Critiera for the protection of aquatic life is the chronic continuous concentration (expressed as a 4-day average) of 87 ug/L. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 5/15/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
61726 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Ammonia as N, Total |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1, one 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 25 water sample ammonia concentrations exceed the calculated CMC evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 25 water sample ammonia concentrations exceed the calculated CMC evaluation guideline, and this sample size is sufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that this water body and pollutant combination should not be placed on the section 303(d) list. The readily available data and information is sufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79031 | ||||
| Pollutant: | Ammonia as N, Total | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Aquatic Life Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 25 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Twenty-five water samples collected from Shag Slough (in Delta Waterways, northwestern portion) by the Sacramento Valley Water Quality Coalition were analyzed for ammonia, pH and temperature. None of the 25 sample results exceeded the calculated ammonia CMC values. | ||||
| Data Reference: | Data for Various Pollutants in Southern San Joaquin Water Quality Coalition, 2004-2009. | ||||
| SWAMP Data: | |||||
| 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. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Per the National Recommended Water Quality Criteria (USEPA 2006): The 1-hour average concentration (acute criterion or CMC) of total ammonia nitrogen (in mg N/L) for freshwater where salmonid fish are present, which is not to be exceeded more than once every three years on average, is calculated using the following equation: CMC=0.275/(1+10^(7.204 - pH)) + 39.0/(1+10^(pH - 7.204)). | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Data for Various Pollutants in South San Joaquin Irrigation District, 2004-2008. | |||||
| Spatial Representation: | The 25 water samples were collected from Shag Slough (in Delta Waterways, northwestern portion) at one monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | The 25 water samples were collected from Shag Slough (in Delta Waterways, northwestern portion) between 2/12/2007 and 9/22/2009 | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data for this line of evidence was collected as part of the Irrigated Lands Regulatory Program. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
50702 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Arsenic |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the 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.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70673 | ||||
| Pollutant: | Arsenic | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Arsenic. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for arsenic is 0.010 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70674 | ||||
| Pollutant: | Arsenic | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Arsenic. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 0.150 mg/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50758 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Atrazine |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the water quality objective for MUN, and zero of the 15 samples exceed the evaluation guideline for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the water quality objective for MUN, and zero of the 15 samples exceed the evaluation guideline for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70676 | ||||
| Pollutant: | Atrazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Atrazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for atrazine is 1 ug/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70675 | ||||
| Pollutant: | Atrazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Atrazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Atrazine, 43 ug/L, is a an EC50 for Lemna gibba (duckweed); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50759 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Azinphos-methyl (Guthion) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the zero samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the zero samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70687 | ||||
| Pollutant: | Azinphos-methyl (Guthion) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Azinphos methyl. Fourteen samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The National Recommended Water Quality criterion for Azinphos Methyl (Guthion) for the protection of freshwater aquatic life is a maximum of 0.01 ug/l. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50760 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Benomyl |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70688 | ||||
| Pollutant: | Benomyl | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | The data was assessed using the CDFW-derived aquatic life criterion for Benomyl of 8.8 µg/L (1-hour average); 0 of 16 samples exceed the criterion for Benomyl. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The California Department of Fish and Wildlife instantaneous criterion (1-hour average) for Benomyl is 8.8 ug/L. | ||||
| Guideline Reference: | Hazard Assessment of the Fungicides Benomyl, Captan, Chlorothalonil, Maneb, and Ziram to Aquatic Organisms | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50762 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Bromacil |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70704 | ||||
| Pollutant: | Bromacil | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Bromacil. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The EC50 for bromacil for Lemna gibba (duckweed) is 45 ug/L (USEPA Office of Pesticide Programs Ecotoxicity database). | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50763 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Cadmium |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70705 | ||||
| Pollutant: | Cadmium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Cadmium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for cadmium is 5 ug/L. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70706 | ||||
| Pollutant: | Cadmium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Cadmium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The cadmium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50764 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Carbaryl |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. One of the 16 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of the 16 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70707 | ||||
| Pollutant: | Carbaryl | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Carbaryl. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The USEPA recommended water quality criterion for freshwater aquatic life for carbaryl is 2.1 µg/L. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57446 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Carbofuran |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the MUN water quality objective, zero of the 16 samples exceed the WARM water Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the MUN water quality objective, zero of the 16 samples exceed the WARM water Evaluation Guideline, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70717 | ||||
| Pollutant: | Carbofuran | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Carbofuran. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The freshwater criterion maximum concentration for carbofuran is 0.5 µg/L (DFG 92-3, 1992). | ||||
| Guideline Reference: | Hazard Assessment of the Insecticide Carbofuran to Aquatic Organisms in the Sacramento River System | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70718 | ||||
| Pollutant: | Carbofuran | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Carbofuran. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for Carbofuran is 18 ug/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50766 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Chlorpyrifos |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70719 | ||||
| Pollutant: | Chlorpyrifos | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Chlorpyrifos. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000). | ||||
| Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005). | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50767 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Chromium |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the three 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. Zero of the three samples exceed the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70720 | ||||
| Pollutant: | Chromium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Chromium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50768 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Copper |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70721 | ||||
| Pollutant: | Copper | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Copper. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California secondary maximum contaminant level for copper is 1.0 mg/L. | ||||
| Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR title 22 section 64449. | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70722 | ||||
| Pollutant: | Copper | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Copper. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57447 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Cyanazine |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70735 | ||||
| Pollutant: | Cyanazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Cyanazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The EC50 for Navicula pelliculosa (freshwater diatom) for cyanazine is 4.8 ug/L (USEPA Office of Pesticide Programs Ecotoxicity database). | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57450 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | DDD (Dichlorodiphenyldichloroethane) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the zero samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of zero samples exceeded Criteria/Objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 78853 | ||||
| Pollutant: | DDD (Dichlorodiphenyldichloroethane) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
| Data Used to Assess Water Quality: | The DDD method detection limits for all eighteen sample results collected from Shag Slough (in Delta Waterways, northwestern portion) are greater than the criterion; therefore, the data could not be assessed with the accuracy required by the Listing Policy. Had the analytical results been at or above the reporting limits, the DDD(o,p') and DDD(p,p') analytical results would have been totaled for each sample date before the results were assessed (yielding a total of nine sample results). | ||||
| Data Reference: | Data for Metals and Nutrients for the City of Anderson, 2006-2008. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Sacramento/San Joaquin River Basin Plan (CVRWQCB, 2007) Pesticides: Total identifiable persistent chlorinated hydrocarbon pesticides shall not be present in the water column at concentrations detectable within the accuracy of analytical methods approved by the Environmental Protection Agency or the Executive Officer.- California Toxics Rule Criteria (USEPA, 2000), for Inland Surface Waters based on drinking water and aquatic organism consumption. The criteria are based on human health protection for carcinogenicity at 1-in-a-million risk level (30-day average) with a limit of 0.00083 ug/L for DDD | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | |||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Nine water samples were collected from Shag Slough (in Delta Waterways, northwestern portion) [Shag Slough at Liberty Island Bridge - 511XSSLIB]. Each sample was analyzed for DDD(o,p') and for DDD(p,p'), for a total of 18 sample results. | ||||
| Temporal Representation: | The samples were collected intermittently to monthly between 2/12/2007 and 9/15/2008 | ||||
| Environmental Conditions: | |||||
| QAPP Information: | The data was collected under the Irrigated Lands Regulatory Program. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
50769 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | DDE (Dichlorodiphenyldichloroethylene) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the zero 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. Zero of the zero samples exceed the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 78904 | ||||
| Pollutant: | DDE (Dichlorodiphenyldichloroethylene) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
| Data Used to Assess Water Quality: | The DDE method detection limits for all eighteen sample results collected from Shag Slough (in Delta Waterways, northwestern portion) are greater than the criterion; therefore, the data could not be assessed with the accuracy required by the Listing Policy. | ||||
| Data Reference: | Data for Metals and Nutrients for the City of Anderson, 2006-2008. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Sacramento/San Joaquin River Basin Plan (CVRWQCB, 2007) Pesticides: Total identifiable persistent chlorinated hydrocarbon pesticides shall not be present in the water column at concentrations detectable within the accuracy of analytical methods approved by the Environmental Protection Agency or the Executive Officer.- California Toxics Rule Criteria (USEPA, 2000), for Inland Surface Waters based on drinking water and aquatic organism consumption. The criteria are based on human health protection for carcinogenicity at 1-in-a-million risk level (30-day average) with a limit of 0.00059 ug/L for DDE | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | |||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Nine water samples were collected from Shag Slough (in Delta Waterways, northwestern portion) [Shag Slough at Liberty Island Bridge - 511XSSLIB]. Each sample was analyzed for DDE(o,p') and for DDE(p,p'), for a total of 18 sample results. | ||||
| Temporal Representation: | The samples were collected intermittently to monthly between 2/12/2007 and 9/15/2008 | ||||
| Environmental Conditions: | |||||
| QAPP Information: | The data was collected under the Irrigated Lands Regulatory Program. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
57451 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | DDT (Dichlorodiphenyltrichloroethane) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the zero samples exceed each of the MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of zero samples exceed each of the MUN and WARM water quality objectives and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70737 | ||||
| Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: The reporting limit is greater than the criterion; therefore, the results of the samples were not assessed. 0 of 0 samples exceed the criterion for DDT (Dichlorodiphenyltrichloroethane). | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The DDT criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70736 | ||||
| Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: The reporting limit is greater than the criterion; therefore, the results of the samples were not assessed. 0 of 0 samples exceed the criterion for DDT (Dichlorodiphenyltrichloroethane). | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The criterion for total DDT to protect human health from consumption of water and organisms is 0.00059 ug/L (California Toxics Rule). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57448 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Dacthal |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the two samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of two samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79517 | ||||
| Pollutant: | Dacthal | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 2 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dacthal. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | According to the USEPA Office of Pesticide Programs Ecotoxicity database, the freshwater aquatic life 1/10th LC50 for Dacthal is 660 ug/L. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 12/19/2007-1/28/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
57453 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Demeton |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the nine samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of nine samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70738 | ||||
| Pollutant: | Demeton | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Demeton. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The USEPA Recommended Water Aquatic Life criterion continuous concentration for demeton in freshwater is 0.1 ug/L. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-1/28/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50771 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Diazinon |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70739 | ||||
| Pollutant: | Diazinon | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Diazinon. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The freshwater chronic criterion value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004). | ||||
| Guideline Reference: | Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57454 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Dicofol |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the nine samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of nine samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70763 | ||||
| Pollutant: | Dicofol | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Dicofol. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Dicofol, 5.9 ug/L, is the maximum acceptable toxicicant concentration (MATC) for Oncorhyncus mykiss (Rainbow trout); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57455 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Dieldrin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the zero samples exceed each of the COM and MUN, zero of the nine samples exceed the WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the zero samples exceed each of the COM and MUN, zero of the nine samples exceed the WARM water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70765 | ||||
| Pollutant: | Dieldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dieldrin. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Dieldrin criterion for the protection of human health from consumption of organisms only, is 0.00014 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70766 | ||||
| Pollutant: | Dieldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Dieldrin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70764 | ||||
| Pollutant: | Dieldrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dieldrin. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The criterion for Dieldrin to protect human health from the consumption of water and organisms is 0.00014 ug/L (California Toxics Rule). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50776 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Dimethoate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70767 | ||||
| Pollutant: | Dimethoate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Dimethoate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for dimethoate, 4.3 ug/L, is one-tenth of the median lethal concentration (LC50 = 43 ug/L) for Pteronarcys californica (Stonefly); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57457 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Disulfoton |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70500 | ||||
| Pollutant: | Disulfoton | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Disulfoton. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The USEPA National Recommended Water Quality criterion for disulfoton in freshwater (0.05 ug/L) is an aquatic life maximum (instantaneous) level. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50777 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Diuron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the four samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the four samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 78603 | ||||
| Pollutant: | Diuron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Aquatic Life Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 4 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Butte Slough to determine beneficial use support.
None of the four sample results were detected at levels above Diuron criterion of 1.3 ug/L. |
||||
| Data Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141. The acute exposure (4-day average) value for Diuron is 1.3 ug/L. | ||||
| Guideline Reference: | Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141. | ||||
| Spatial Representation: | Data for this line of evidence for Butte Slough was collected at one monitoring site: [Butte Slough at Lower Pass Rd (BS1) - 520CRCBS1] | ||||
| Temporal Representation: | Data was collected annually between 9/20/2006 and 9/16/2008 | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | Data for this line of evidence was collected as part of the Irrigated Lands Regulatory Program. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
60789 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Endosulfan sulfate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of nine samples exceed the criterion for the protection of human health from consumption of organisms only (California Toxics Rule, 2000) for COMM, and 0 of 9 samples exceed the criterion for the protection of human health from consumption of water and organisms (California Toxics Rule, 2000) for MUN. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of nine samples exceed the criterion for the protection of human health from consumption of organisms only (California Toxics Rule, 2000) for COMM, and 0 of 9 samples exceed the criterion for the protection of human health from consumption of water and organisms (California Toxics Rule, 2000) for MUN and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70502 | ||||
| Pollutant: | Endosulfan sulfate | ||||
| 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: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan sulfate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan Sulfate criterion for the protection of human health from consumption of water and organisms is 110 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70503 | ||||
| Pollutant: | Endosulfan sulfate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan sulfate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan Sulfate criterion for the protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57458 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Endrin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed each of the COM, MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed each of the COM, MUN and WARM water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70504 | ||||
| Pollutant: | Endrin | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endrin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endrin criterion for the protection of human health from the consumption of water and organisms is 0.76 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70517 | ||||
| Pollutant: | Endrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endrin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70505 | ||||
| Pollutant: | Endrin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endrin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endrin criterion for the protection of human health from consumption of organisms only is 0.81 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57460 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Endrin aldehyde |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed each of the COM and MUN 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed each of the COM and MUN water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70519 | ||||
| Pollutant: | Endrin aldehyde | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endrin Aldehyde. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endrin Aldehyde criterion for the protection of human health from consumption of organisms only is 0.81 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70518 | ||||
| Pollutant: | Endrin aldehyde | ||||
| 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: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endrin Aldehyde. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Total identifiable persistent chlorinated hydrocarbon pesticides shall not be present in the water column at concentrations detectable within the accuracy of analytical methods approved by the Environmental Protection Agency or the Executive Officer (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57462 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Ethoprop |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70521 | ||||
| Pollutant: | Ethoprop | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Ethoprop. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Ethoprop, 1.4 ug/L, is the maximum acceptable toxicicant concentration (MATC) for Daphnia magna (Water flea); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50778 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Glyphosate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 14 samples exceed the water quality objective for MUN, and zero of the 14 samples exceed the evaluation guideline for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 14 samples exceed the water quality objective for MUN, and zero of the 14 samples exceed the evaluation guideline for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70535 | ||||
| Pollutant: | Glyphosate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 14 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Glyphosate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for Glyphosate is 700 ug/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70534 | ||||
| Pollutant: | Glyphosate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 14 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Glyphosate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for glyphosate, 5,500 ug/L, is one-tenth of the median lethal concentration (LC50 = 55,000 ug/L) for Chironimus plumosus (Midge). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57465 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Heptachlor |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the zero samples exceed each of the COM, MUN, and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the zero samples exceed each of the COM, MUN, and WARM water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70550 | ||||
| Pollutant: | Heptachlor | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70537 | ||||
| Pollutant: | Heptachlor | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Heptachlor criterion for the protection of human health from consumption of organisms only is 0.00021 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70536 | ||||
| Pollutant: | Heptachlor | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The CTR objective for Heptachlor to protect human health from the consumption of water and organisms is 0.00021 ug/L. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57466 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Heptachlor epoxide |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the 15 samples exceed each of the COM, MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3.Zero of the 15 samples exceed each of the COM, MUN and WARM water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70553 | ||||
| Pollutant: | Heptachlor epoxide | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor epoxide. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Heptachlor Epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70552 | ||||
| Pollutant: | Heptachlor epoxide | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor epoxide. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Heptachlor Epoxide criterion for the protection of human health from consumption of organisms only is 0.00011 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70551 | ||||
| Pollutant: | Heptachlor epoxide | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor epoxide. Nine samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The CTR objective for Heptachlor epoxide to protect human health from the consumption of water and organisms is 0.0001 ug/L. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57461 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Indicator Bacteria |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Three of 25 water samples exceed the evaluation guideline for E. coli. One of three water samples exceed the evaluation guideline for fecal coliform. A single water sample does not exceed the evaluation guideline for total coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of 25 water samples exceed the evaluation guideline for E. coli, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. One of three water samples exceed the evaluation guideline for fecal coliform, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A single water sample does not exceed the evaluation guideline for total coliform, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70520 | ||||
| Pollutant: | Escherichia coli (E. coli) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 25 | ||||
| Number of Exceedances: | 3 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 3 of 25 samples exceed the criterion for Escherichia coli. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River and San Joaquin River Basins) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the Tulare Lake Basin Second Edition. rev. Jan 2004 | ||||
| Evaluation Guideline: | The USEPA recommended objective for single sample maximum allowable density of E. coli in freshwater designated beach areas is 235 MPN/100mL. | ||||
| Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/22/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70533 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for Coliform, Fecal. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | In waters designated for contact recreation (REC-1), the fecal coliform concentration based on a minimum of not less than five samples for any 30-day period shall not exceed a geometric mean of 200/100 ml, nor shall more than ten percent of the total number of samples taken during any 30-day period exceed 400/100 ml. (Water Quality Control Plan, Central Valley Region, Tulare Lake Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the Tulare Lake Basin Second Edition. rev. Jan 2004 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/20/2009-6/16/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50779 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Lead |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 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 CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70554 | ||||
| Pollutant: | Lead | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Lead. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57467 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed each of the COM, MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed each of the COM, MUN and WARM water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70565 | ||||
| Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, gamma. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The HCH, Gamma (Lindane) for the protection of human health from the consumption of organisms only is 0.063 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70564 | ||||
| Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, gamma. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for HCH, gamma (Lindane) is 0.2 ug/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70566 | ||||
| Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, gamma. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The gamma-HCH (Lindane) criterion maximum concentration to protect aquatic life in freshwater is 0.95 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57479 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Linuron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Evaluation Guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70567 | ||||
| Pollutant: | Linuron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Linuron. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Linuro, 13.7 ug/L, is the EC50 for Navicula pelliculosa (freshwater diatom). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50780 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Malathion |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70568 | ||||
| Pollutant: | Malathion | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Malathion. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion, 0.028 ug/L, is not exceeded more than once every three years on the average (UC Davis Aquatic Life Criterion). | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57480 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Methidathion |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the14 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 14 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70578 | ||||
| Pollutant: | Methidathion | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 14 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Methidathion. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Methidathion, 0.86 ug/L, is the maximum acceptable toxicicant concentration (MATC) for Daphina magna (Water flea); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57481 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Methiocarb |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Evaluation Guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70579 | ||||
| Pollutant: | Methiocarb | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Methiocarb. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for methiocarb, 43.6 ug/L, is one-tenth of the median lethal concentration (LC50 = 436 ug/L) for Oncorhyncus mykiss (Rainbow trout); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50782 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Methomyl |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70580 | ||||
| Pollutant: | Methomyl | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Methomyl. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The criteria continuous concentration for Methomyl is 0.5 ug/L (4-day average). (CDFG, 1996) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57482 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Methoxychlor |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed each of the MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of nine samples exceed each of the MUN and WARM water quality objectives and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70593 | ||||
| Pollutant: | Methoxychlor | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Methoxychlor. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Total identifiable persistent chlorinated hydrocarbon pesticides shall not be present in the water column at concentrations detectable within the accuracy of analytical methods approved by the Environmental Protection Agency or the Executive Officer (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70581 | ||||
| Pollutant: | Methoxychlor | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Methoxychlor. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for Methoxychlor, 30 ug/L, is incorporated by reference into the (Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins). | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57483 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Methyl Parathion |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70594 | ||||
| Pollutant: | Methyl Parathion | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Parathion, Methyl. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The California Department of Fish and Game instantaneous aquatic life criterion for Methyl Parathion is 0.08 ug/L. | ||||
| Guideline Reference: | Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System. California Department of Fish and Game. Environmental Services Division. Administrative Report 92-1 | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57484 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Mirex |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the nine samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of nine samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79518 | ||||
| Pollutant: | Mirex | ||||
| 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: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Mirex. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The criterion continuous concentration for Mirex is 0.001 ug/l from the National Recommended Water Quality Criteria. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
57485 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Molinate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the one samples exceed the MUN water quality objective, zero of the one samples exceed the WARM water evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the one samples exceed the MUN water quality objective, zero of the one samples exceed the WARM water evaluation guideline, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70595 | ||||
| Pollutant: | Molinate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Molinate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Molinate, 600 ug/L, the maximum acceptable toxicicant concentration (MATC) for Daphnia magna (Water flea). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70596 | ||||
| Pollutant: | Molinate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Molinate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for Molinate is 20 ug/L . | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57486 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Monuron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Evaluation Guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79520 | ||||
| Pollutant: | Monuron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Monuron. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The evaluation guideline for monuron, 330 ug/L, is one-tenth of the median lethal concentration (LC50). The 1/10 LC50 for monuron is 330 ug/L (USEPA Office of Pesticide Programs Ecotoxicity database). | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
57487 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | N-(4-Chlorophenyl) -N' methylurea / Monuron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Evaluation Guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70597 | ||||
| Pollutant: | N-(4-Chlorophenyl) -N' methylurea / Monuron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Monuron. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for monuron, 330 ug/L, is one-tenth of the median lethal concentration (LC50 = 3,300 ug/L) for Lepomis gibbosus (Pumpkinseed sunfish). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50784 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Nickel |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess pollutant. Zero of the 16 samples exceed the water quality objective for COMM, zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the water quality objective for COMM, zero of the 16 samples exceed the water quality objective for MUN, and zero of the 16 samples exceed the water quality objective for WARM and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70614 | ||||
| Pollutant: | Nickel | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Nickel. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Nickel criterion for the protection of human health from consumption of organisms is 4.6 mg/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70615 | ||||
| Pollutant: | Nickel | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Nickel. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70613 | ||||
| Pollutant: | Nickel | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Nickel. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for nickel is 0.1 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
60790 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of eight samples exceed the California Primary MCL for MUN. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of eight samples exceed the California Primary MCL for MUN and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70616 | ||||
| Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 8 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Nitrate/Nitrite as N. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for nitrate + nitrite (as N) is 10.0 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/16/2009-9/22/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50787 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Nitrogen, Nitrate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 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. Zero of the 15 samples exceed the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70617 | ||||
| Pollutant: | Nitrogen, Nitrate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Nitrate as N. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for nitrate (NO3 as N) is 10.0 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-1/26/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57488 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Nitrogen, Nitrite |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70618 | ||||
| Pollutant: | Nitrogen, Nitrite | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for Nitrite as N. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for nitrite (as N) is 1 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-1/26/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50789 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Oryzalin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 14 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 14 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70636 | ||||
| Pollutant: | Oryzalin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 14 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Oryzalin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The evaluation guideline for Oryzalin, 15.4 ug/L, is an EC50 for Lemna gibba (Duckweed). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57489 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Oxamyl (Vydate) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 16 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79521 | ||||
| Pollutant: | Oxamyl (Vydate) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Oxamyl. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Maximum Contaminant Level for Oxamyl incorporated by reference in the Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins is 50 ug/L (Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Maximum Contaminant Levels for organic and inorganic chemicals. CCR | |||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
50790 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Oxyfluorfen |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 1 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 1 samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70637 | ||||
| Pollutant: | Oxyfluorfen | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Oxyfluorfen. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for oxyfluorfen, 20 ug/L, is one-tenth of the median lethal concentration (LC50 = 200 ug/L) for Lepomis macrochirus (Bluegill sunfish). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
38307 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Oxygen, Dissolved |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of 26 samples exceed the COLD water quality objective and one of nine samples exceed the WARM 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 CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 26 samples exceed the COLD water quality objective and one of nine samples exceed the WARM water quality objective. This does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 22656 | ||||
| Pollutant: | Oxygen, Dissolved | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Aquatic Life Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | 9 samples were taken from Shag Slough from August 2005 through September 2006. 1 sample was below the minimum dissolved oxygen concentration (5 mg/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 | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Within the legal boundaries of the Delta, the dissolved oxygen concentration shall not be reduced below: 7.0 mg/l in the Sacramento River (below the I Street Bridge) and in all Delta waters west of the Antioch Bridge; 6.0 mg/l in the San Joaquin River (between Turner Cut and Stockton, 1 September through 30 November); and 5.0 mg/l in all other Delta waters except for those bodies of water which are constructed for special purposes and from which fish have been excluded or where the fishery is not important as a beneficial use. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Samples were collected from Shag Slough at Liberty Island Bridge | ||||
| Temporal Representation: | Samples were collected between August and September 2006 at monthly interval. | ||||
| 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: | 70638 | ||||
| Pollutant: | Oxygen, Dissolved | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Dissolved | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 26 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data to determine beneficial use support: None of 26 sample results exceed the criterion for Oxygen, Dissolved. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The minimum dissolved oxygen concentration is 5.0 mg/L in all other Delta Waters. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence was collected at one monitoring site [Shag Slough at Liberty Island Bridge-511XSSLIB]. | ||||
| Temporal Representation: | Data was collected monthly between 2/12/2007 and 9/2/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57490 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Parathion |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the zero samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of zero samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70639 | ||||
| Pollutant: | Parathion | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Parathion, Ethyl. Fourteen samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The USEPA national ambient water quality chronic criterion (4-hour maximum) for parathion, is 0.013 µg/L, is for freshwater aquatic life. | ||||
| Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50792 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Pendimethalin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the one samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the one samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70640 | ||||
| Pollutant: | Pendimethalin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Pendimethalin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Pendimethalin, 5.4 ug/L, is the EC50 for Selenastrun capricornutum (Green algae). USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57493 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Phorate |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70656 | ||||
| Pollutant: | Phorate | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Phorate. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for phorate, 0.2 ug/L, is one-tenth of the median lethal concentration (LC50 = 2.0 ug/L) for Lepomis macrochirus (Bluegill sunfish). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57494 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Phosmet |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 14 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 14 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70657 | ||||
| Pollutant: | Phosmet | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 14 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Phosmet. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Phosmet, 5.6 ug/L, is the EC50 for Daphnia magna (Water flea). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57495 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Prometon (Prometone) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70658 | ||||
| Pollutant: | Prometon (Prometone) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Prometon. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Prometon, 98 ug/L, is the EC50 for Selenastrum capricornutum (Green algae). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57496 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Prometryn |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70659 | ||||
| Pollutant: | Prometryn | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Prometryn. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Prometryn, 1 ug/L, is the EC50 for Navicula pelliculosa (freshwater diatom). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57498 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Propargite |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the one samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of one samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70677 | ||||
| Pollutant: | Propargite | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Propargite. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Propargite, 11 ug/L, is a maximum acceptable toxicicant concentration (MATC) calculated for Daphnia magna (Water flea); USEPA Office of Pesticide Programs Ecotoxicity database. | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57497 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Propazine |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 15 samples exceeded Evaluation Guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70678 | ||||
| Pollutant: | Propazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Propazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Propazine, 25 ug/L, is the EC50 for Navicula pelliculosa (freshwater diatom). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
60791 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| 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 |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of sixteen samples exceed the California Primary MCL for MUN, and 1 of 16 samples exceed the criterion continuous concentration to protect aquatic life in freshwater (California Toxics Rule, 2000) for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of sixteen samples exceed the California Primary MCL for MUN, and 1 of 16 samples exceed the criterion continuous concentration to protect aquatic life in freshwater (California Toxics Rule, 2000) for WARM and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70679 | ||||
| Pollutant: | Selenium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 7 samples exceed the criterion for Selenium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for selenium is 0.05 mg/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70680 | ||||
| Pollutant: | Selenium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 1 of 7 samples exceed the criterion for Selenium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50796 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Silver |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the three samples exceed the water quality objective for MUN, and zero of the three samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the three samples exceed the water quality objective for MUN, and zero of the three samples exceed the water quality objective for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70681 | ||||
| Pollutant: | Silver | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Silver. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California secondary maximum contaminant level for silver is 0.1 mg/L. | ||||
| Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR title 22 section 64449. | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70692 | ||||
| Pollutant: | Silver | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Silver. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50797 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Simazine |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 15 samples exceed the water quality objective for MUN, and zero of the 15 samples exceed the evaluation guideline for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 15 samples exceed the water quality objective for MUN, and zero of the 15 samples exceed the evaluation guideline for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70694 | ||||
| Pollutant: | Simazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Simazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California primary maximum contaminant level for Simazine is 4 ug/L. | ||||
| Objective/Criterion Reference: | Maximum Contaminant Levels for organic and inorganic chemicals. CCR | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70693 | ||||
| Pollutant: | Simazine | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 15 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Simazine. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Simazine, 90 ug/L, is the EC50 for Navicula pelliculosa (freshwater diatom). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57499 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Specific Conductivity |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. One of the 26 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of 26 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70501 | ||||
| Pollutant: | Specific Conductivity | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 26 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 1 of 26 samples exceed the criterion for Conductivity(Us). | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California secondary maximum contaminant levels for electrical conductivity provide a range of values including a recommended level (900 uS/cm), an upper level (1,600 uS/cm) and a short-term level (2,200 uS/cm). The recommended level of 900 uS/cm was used as it is protective of all drinking water uses. | ||||
| Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR title 22 section 64449. | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/22/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50798 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Tebuthiuron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70695 | ||||
| Pollutant: | Tebuthiuron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Tebuthiuron. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Tebuthiuron, 135 ug/L, is the EC50 for Lemna gibba (Duckweed). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57509 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Temperature, water |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfy the data quality requirements of section 6.1.4 of the Listing Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Listing Policy. To determine the appropriate use support rating for COLD, an evaluation guideline identifying the optimal temperature range for rainbow trout for growth and completion of most life stages was used to interpret the narrative water quality objective for temperature. Section 6.1.5.2 of the Listing Policy states ??samples should represent statistically or in a targeted manner the segment of the water body.? Water temperature data collected for this water body do not capture the spatial variability of temperatures experienced by aquatic life. Section 6.1.5.3 of the Listing Policy states ?Samples should be representative of the critical timing that the pollutant is expected to impact the water body.? Water temperature data collected for this water body do not capture the temporal variability of temperatures experienced by aquatic life. Per Section 6.1.5.9 of the Listing Policy, ??temperature monitoring data shall be compared to the temperature requirements of aquatic life living in the water segment.? Currently, the readily available data for water temperature in this segment are insufficient to determine whether growth and all life stages of rainbow trout are being supported. The monitoring program that generated the temperature data was not designed to evaluate attainment of temperature standards to support aquatic life. The surface water grab samples collected do not provide sufficient temporal and spatial representation of temperature conditions throughout the water body segment for fish exposure. 3. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70696 | ||||
| Pollutant: | Temperature, water | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 26 | ||||
| Number of Exceedances: | 10 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 10 of 26 samples exceed the criterion for Water Temperature. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses (Sacramento-San Juoaquin River Basin Plans). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
| Guideline Reference: | Inland Fishes of California (1976) | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/22/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
60792 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Thallium |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of three samples exceed the evaluation guideline for COLD, and 0 of 3 samples exceed the criteria for the protection of human health from consumption of organisms only (California Toxics Rule, 2000) for COMM, and 0 of 3 samples exceed the California MCL for MUN. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of three samples exceed the evaluation guideline for COLD, and 0 of 3 samples exceed the criteria for the protection of human health from consumption of organisms only (California Toxics Rule, 2000) for COMM, and 0 of 3 samples exceed the California MCL for MUN and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79131 | ||||
| Pollutant: | Thallium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Thallium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Thallium criteria for the protection of human health from consumption of organisms only is 6,300 mg/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
|
|||||
| LOE ID: | 79132 | ||||
| Pollutant: | Thallium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Thallium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins is 0.002 mg/L (Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Maximum Contaminant Levels for organic and inorganic chemicals. CCR | |||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
|
|||||
| LOE ID: | 79130 | ||||
| Pollutant: | Thallium | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 3 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Thallium. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Valley Region, Sacramento and San Joaquin Basins). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,600 hours of exposure. | ||||
| Guideline Reference: | Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 4/17/2007-6/20/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
57510 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Thiobencarb/Bolero |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the one samples exceed the MUN water quality objective, zero of the one samples exceed the WARM water Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the one samples exceed the MUN water quality objective, zero of the one samples exceed the WARM water Evaluation Guideline, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70708 | ||||
| Pollutant: | Thiobencarb/Bolero | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Thiobencarb. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Thiobencarb, 1.4 ug/L, is a maximum acceptable toxicicant concentration (MATC) calculated for Daphnia magna (Water flea). (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70709 | ||||
| Pollutant: | Thiobencarb/Bolero | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Thiobencarb. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of Thiobencarb in excess of 1.0 µg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57512 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Toxaphene |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the zero samples exceed each of the COM, MUN and WARM 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of zero samples exceed each of the COM, MUN and WARM water quality objectives and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70723 | ||||
| Pollutant: | Toxaphene | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Toxaphene. Eight samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-8/18/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70712 | ||||
| Pollutant: | Toxaphene | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Toxaphene. Eight samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Toxaphene criterion for the protection of human health from consumption of organisms only is 0.00075 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-8/18/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70711 | ||||
| Pollutant: | Toxaphene | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Toxaphene. Eight samples were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Toxaphene criterion for the protection of human health from the consumption of water and organisms is 0.00073 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-8/18/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
37712 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Toxicity |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of 21 water samples exhibited significant toxicity. The toxicity tests included survival of Ceriodaphnia dubia, total cell count of Selenastrum capricornutum and survival of Pimephales promelas. One of six sediment samples tested with Hyalella azteca exhibited significant toxicity. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 21 water samples exhibited significant toxicity and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 59189 | ||||
| Pollutant: | Toxicity | ||||
| LOE Subgroup: | Toxicity | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 21 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | TOXICITY TESTING | ||||
| Data Used to Assess Water Quality: | Twenty-one samples were collected to evaluate water toxicity. None of the samples exhibited significant toxicity. The toxicity tests included survival of Ceriodaphnia dubia, total cell count of Selenastrum capricornutum and survival of Pimephales promelas. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided). | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 5 Basin Plan. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold. This data set reports a simple pass/fail (Yes/No) code to report toxicity that is equivalent to the SWAMP SL code. | ||||
| Guideline Reference: | Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 | ||||
| Spatial Representation: | The samples were collected at Shag Slough at Liberty Island Bridge. | ||||
| Temporal Representation: | The samples were collected from August 2005 to September 2008. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Quality Assurance Project Plan Guidelines For Order NO. R5-2009-0875 Sacramento Valley Water Quality Coalition Monitoring And Reporting Program. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 59190 | ||||
| Pollutant: | Toxicity | ||||
| LOE Subgroup: | Toxicity | ||||
| Matrix: | Sediment | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 6 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | TOXICITY TESTING | ||||
| Data Used to Assess Water Quality: | Six samples were collected to evaluate sediment toxicity. One of the samples exhibited significant toxicity. The toxicity tests included survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided). | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 5 Basin Plan. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted using the significant effect code: S equals significant, SG equals significantly greater and SL equals significantly lower. If a sample has any one of these codes, it will be considered an exceedance. | ||||
| Guideline Reference: | Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064 | ||||
| Spatial Representation: | The samples were collected at Shag Slough at Liberty Island Bridge. | ||||
| Temporal Representation: | The samples were collected from September 2005 to August 2008. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Quality Assurance Project Plan Guidelines For Order NO. R5-2009-0875 Sacramento Valley Water Quality Coalition Monitoring And Reporting Program. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
50799 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Trifluralin |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the one samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the one samples exceed the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70724 | ||||
| Pollutant: | Trifluralin | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Trifluralin. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | The Basin Plan states: "Where valid testing has developed 96-hour LC50 values for aquatic organisms..., 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... or [O]ther available information on the pesticide..." The evaluation guideline for Trifluralin, 1.58 ug/L, is a maximum acceptable toxicicant concentration (MATC) calculated for Oncorhyncus mykiss (Rainbow trout). USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
| Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected on a single day 5/15/2007. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
51163 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | Zinc |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 16 samples exceed the evaluation guideline for MUN and zero of the 16 samples exceed the evaluation guideline for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 16 samples exceed the evaluation guideline for MUN and zero of the 16 samples exceed the evaluation guideline for WARM and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70725 | ||||
| Pollutant: | Zinc | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Zinc. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California secondary maximum contaminant level for zinc is 5.0 mg/L. | ||||
| Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR title 22 section 64449. | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70726 | ||||
| Pollutant: | Zinc | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial 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: | Water Board staff assessed agwaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 16 samples exceed the criterion for Zinc. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The chromium criterion in freshwater is hardness-dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness-dependent formula for metals criteria. | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
51178 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | alpha-Endosulfan (Endosulfan 1) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed the water quality objective for COMM, zero of the nine samples exceed the water quality objective for MUN and zero of the nine samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed the water quality objective for COMM, zero of the nine samples exceed the water quality objective for MUN and zero of the nine samples exceed the water quality objective for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70654 | ||||
| Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
| 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: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan I. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan I criterion for the protection of human health from consumption of water and organisms is 110 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70671 | ||||
| Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan I. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan I criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70655 | ||||
| Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan I. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan I criterion for the protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57444 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | alpha.-BHC (Benzenehexachloride or alpha-HCH) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed the COM, zero of the zero samples exceed the MUN 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed the COM, zero of the zero samples exceed the MUN water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70653 | ||||
| Pollutant: | alpha.-BHC (Benzenehexachloride or alpha-HCH) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, alpha. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The HCH, alpha criterion for the protection of human health from consumption of organisms only is 0.013 ug/L (California Toxics Rule, 2002). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70652 | ||||
| Pollutant: | alpha.-BHC (Benzenehexachloride or alpha-HCH) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for HCH, alpha. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The HCH, alpha criterion, 0.0039 ug/L, is for the protection of human health from the consumption of water and organisms. (California Toxics Rule, 2002) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57445 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | beta-BHC (Benzenehexachloride or beta-HCH) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a one line(s) of evidence are necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed each of the COM and MUN 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed each of the COM and MUN water quality objective, and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70690 | ||||
| Pollutant: | beta-BHC (Benzenehexachloride or beta-HCH) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, beta. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The HCH, beta criterion for the protection of human health from consumption of organisms only is 0.046 ug/L (California Toxics Rule, 2002). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70689 | ||||
| Pollutant: | beta-BHC (Benzenehexachloride or beta-HCH) | ||||
| 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: | Water Board staff assessed Ag Waiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for HCH, beta. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The HCH, beta criterion for the protection of human health from the consumption of water and organisms is 0.014 ug/L (California Toxics Rule, 2002). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
51179 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | beta-Endosulfan (Endosulfan 2) |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the nine samples exceed the water quality objective for COMM, zero of the nine samples exceed the water quality objective for MUN and zero of the nine samples exceed the water quality objective for WARM. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the nine samples exceed the water quality objective for COMM, zero of the nine samples exceed the water quality objective for MUN and zero of the nine samples exceed the water quality objective for WARM and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 70691 | ||||
| Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
| 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: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan II. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The beta-endosulfan criterion for the protection of human health from consumption of water and organisms is 110 ug/L. (California Toxics Rule, 2000) | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70702 | ||||
| Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan II. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan II criterion for the protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
|
|||||
| LOE ID: | 70703 | ||||
| Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Warm Freshwater Habitat | ||||
| Number of Samples: | 9 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed agvaiver data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 9 samples exceed the criterion for Endosulfan II. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Endosulfan II criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L (California Toxics Rule, 2000). | ||||
| Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed. | ||||
| QAPP Information Reference(s): | Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition. | ||||
DECISION ID |
57492 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
||
| Pollutant: | pH |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. Zero of the 26 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 26 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 79129 | ||||
| Pollutant: | pH | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 26 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 0 of 26 samples exceed the criterion for pH. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/22/2009. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
38461 |
Region 5 |
Shag Slough (in Delta Waterways, northwestern portion) |
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| Pollutant: | Boron |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
| Revision Status | Original |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. One 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. One of 5 available dissolved Boron concentrations exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. In addition, 0 of 7 available total Boron concentrations exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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| LOE ID: | 79515 | ||||
| Pollutant: | Boron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Agricultural Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | State Water Board staff assessed ILRP data for Shag Slough (in Delta Waterways, northwestern portion) to determine beneficial use support and results are as follows: 1 of 16 samples exceed the criterion for Boron. | ||||
| Data Reference: | Data for Various Pollutants in Sacramento Valley Water Quality Coalition, 2005-2009. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water, including irrigation of various types of crops and stock watering. At or below the limits presented in the Water Quality Goals tables, agricultural uses of water should not be limited. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The criteria for boron is 700 ug/L (0.7 mg/L). | ||||
| Guideline Reference: | Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985) | ||||
| Spatial Representation: | Data for this line of evidence for Shag Slough (in Delta Waterways, northwestern portion) was collected at 1 monitoring site [ Shag Slough at Liberty Island Bridge - 511XSSLIB] | ||||
| Temporal Representation: | Data was collected over the time period 2/12/2007-9/15/2008. | ||||
| Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
| QAPP Information: | The Quality Assurance Project Plan for Sacramento Valley Water Quality Coalition was followed | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 22657 | ||||
| Pollutant: | Boron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Agricultural Supply | ||||
| Number of Samples: | 7 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Nine discrete water samples, including two sets of duplicates, were collected from Shag Slough between March 1 2006 and September 22 2006. The nine discrete samples yielded seven averaged total Boron concentrations. Zero of 7 averaged concentrations exceeded the evaluation guideline for Boron. | ||||
| 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 | |||||
| SWAMP Data: | Non-SWAMP | ||||
| 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 (CVRWQCB, 2007). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Boron levels should not exceed the Agricultural Water Quality Goal for Boron of 700 ug/L (Ayers and Westcott, 1985). | ||||
| Guideline Reference: | Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985) | ||||
| Spatial Representation: | Samples were collected at Liberty Island Bridge. | ||||
| Temporal Representation: | Samples were collected at bimonthly to monthly intervals from March 1 2006 to September 22 2006. | ||||
| 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): | |||||
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| LOE ID: | 22658 | ||||
| Pollutant: | Boron | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Dissolved | ||||
| Beneficial Use: | Agricultural Supply | ||||
| Number of Samples: | 5 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Five monthly water samples were collected from Shag Slough between March 26 2006 and September 22 2006. One of 5 dissolved water concentrations exceeded the evaluation guideline for (total) Boron. The sample collected on June 26 2006, contained 0.52 mg/L total Boron and 1.1 mg/L dissolved Boron, suggesting that there is a problem with Quality Control for this sample date. | ||||
| 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 | |||||
| SWAMP Data: | Non-SWAMP | ||||
| 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 (CVRWQCB, 2007). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed | ||||
| Evaluation Guideline: | Boron levels should not exceed the Agricultural Water Quality Goal for Boron of 700 ug/L (Ayers and Westcott, 1985). | ||||
| Guideline Reference: | Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985) | ||||
| Spatial Representation: | Samples were collected at Liberty Island Bridge. | ||||
| Temporal Representation: | Samples were collected at monthly intervals from March 26 2006 to September 22 2006. | ||||
| 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): | |||||