| Water Body Name: | Indian Valley Reservoir (Lake County) |
| Water Body ID: | CAL5134002020000209140532 |
| Water Body Type: | Lake & Reservoir |
DECISION ID |
73290 |
Region 5 |
Indian Valley Reservoir (Lake County) |
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| Pollutant: | Mercury |
| Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list)(2016) |
| Revision Status | Original |
| Sources: | A Source Unknown |
| Expected TMDL Completion Date: | 2027 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under 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. Thirty-four of the samples exceed the water quality objective. Three LOEs were not used in the final listing decision due to the criterion change. The data in these LOEs were reassessed in new LOEs with the new criterion and these replacement LOEs are used in the final listing decision. These LOE replacements are as follows: 1) LOE 22561 was replaced with LOE 95485; 2) LOE 22562 was replaced with LOE 95486; and 3) LOE 22575 was replaced with LOE 95514 Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 34 of 40 samples exceed the USEPA fish tissue criterion for human health and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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| LOE ID: | 95514 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 2 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at one location from Indian Valley Reservoir. A total of 2 out of 2 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.45 ppm for the 2 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species:
Largemouth Bass- one 5-fish composite sample, 0.47 ppm, 1 exceedance; Sacramento Sucker- one 5-fish composite sample, 0.43 ppm, 1 exceedance. Both composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. |
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| Data Reference: | Toxic Substances Monitoring Program: Freshwater Bioaccumulation Monitoring: TSM Program Data 1978-2000. State Water Resources Control Board, Division of Water Quality | ||||
| 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. (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 U.S. EPA 304(a)-recommended water quality criterion for concentrations of methylmercury in fish tissue of trophic level 4 fish (150 - 500 mm; fillet wet weight) is 0.20 mg/Kg. | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at one location near the center of Indian Valley Reservoir. | ||||
| Temporal Representation: | Fish samples were collected during one sampling event on 5/30/1985 | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Good.. Quality Control for the fish sampling, tissue preparation, mercury analysis, and QA sample analysis portions of this study was conducted as described in the Toxic Substance Monitoring Report for 1985 (Rasmussen et al., 1987). | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 95485 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 34 | ||||
| Number of Exceedances: | 29 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at two locations from Indian Valley Reservoir. A total of 29 out of 34 samples exceeded the USEPA fish tissue criterion for human health.
1) Indian Valley Reservoir, North: The average wet weight mercury concentration in fish tissue was 0.60 ppm for the 29 samples collected at this location. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Carp- 5 samples, 0.33-0.54 ppm (average 0.46 ppm), 5 exceedances; Channel Catfish- 7 samples, 0.19-0.91 ppm (average 0.44 ppm), 3 exceedances; Largemouth Bass- 12 samples, 0.52-1.14 ppm (average 0.85 ppm), 12 exceedances; Redear Sunfish- 5 samples, 0.25-0.41 ppm (average 0.31 ppm), 4 exceedances. 2) Indian Valley Reservoir, South: Five Pumpkinseed samples were collected for tissue analysis at this location. Five of the 5 samples exceeded the USEPA fish tissue criterion for human health. The wet weight mercury concentrations of the 5 samples ranged from 0.23 ppm to 0.32 ppm, with an average of 0.28 ppm. All 34 samples were collected from fish with total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. |
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| Data Reference: | Fish Mercury Project, Year 2 Annual Report, Sport Fish Sampling and Analysis. Final Report. October 2007 | ||||
| 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. (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 U.S. EPA 304(a)-recommended water quality criterion for concentrations of methylmercury in fish tissue of trophic level 4 fish (150 - 500 mm; fillet wet weight) is 0.20 mg/Kg. | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at two locations from Indian Valley Reservoir at the northern and southern ends. | ||||
| Temporal Representation: | Fish samples were collected during one sampling event on 8/14/2006. | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Excellent.. Quality Control for all of the elements described in section 6.1.4 of the Policy was conducted in accordance with the Laboratory QAPP developed by Moss Landing Marine Laboratories (MLML, 2005). This data was also collected and analyzed in accordance with the CALFED Mercury Project QAPP (Puckett and van Buuren, 2000). | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 22575 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 2 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at one location from Indian Valley Reservoir. A total of 2 out of 2 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.45 ppm for the 2 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Largemouth Bass- one 5-fish composite sample, 0.47 ppm, 1 exceedance; Sacramento Sucker- one 5-fish composite sample, 0.43 ppm, 1 exceedance. Both composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. | ||||
| Data Reference: | Toxic Substances Monitoring Program: Freshwater Bioaccumulation Monitoring: TSM Program Data 1978-2000. State Water Resources Control Board, Division of Water Quality | ||||
| 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. The 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: | The USEPA Fish Tissue Residue Criterion for methylmercury in fish is 0.3 mg/kg (0.3 ppm) for the protection of human health. This is the concentration in fish tissue that should not be exceeded based on a total fish and shellfish consumption-weighted rate of 0.0175 kg fish/day. (USEPA, 2001) | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at one location near the center of Indian Valley Reservoir. | ||||
| Temporal Representation: | Fish samples were collected during one sampling event on 5/30/1985. | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Good.. Quality Control for the fish sampling, tissue preparation, mercury analysis, and QA sample analysis portions of this study was conducted as described in the Toxic Substance Monitoring Report for 1985 (Rasmussen et al., 1987). | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 22562 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 4 | ||||
| Number of Exceedances: | 3 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at one location from Indian Valley Reservoir. A total of 3 out of 4 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.38 ppm for the 4 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Channel Catfish- 2 composite samples, 0.19 and 0.34 ppm, 1 exceedance; Largemouth Bass- 2 composite samples, 0.32 and 0.67 ppm, 2 exceedances. All 4 composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. | ||||
| Data Reference: | Mercury Contamination in Fish from Northern California Lakes and Reservoirs. State of California. The Resources Agency. Department of Water Resources. Northern District. July 2007 | ||||
| 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. The 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: | The USEPA Fish Tissue Residue Criterion for methylmercury in fish is 0.3 mg/kg (0.3 ppm) for the protection of human health. This is the concentration in fish tissue that should not be exceeded based on a total fish and shellfish consumption-weighted rate of 0.0175 kg fish/day. (USEPA, 2001) | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at one location from Indian Valley Reservoir near the spillway. | ||||
| Temporal Representation: | Fish samples were collected during the spring and summer of 2000 and 2001. | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Excellent.. Quality control for sample collection, preparation, handling, and analyses were conducted in accordance with the Surface Water Ambient Monitoring Program Quality Assurance Program Plan (Puckett, 2002) with the following exception: instead of wrapping fish in Teflon sheets before being frozen and transported to the laboratory, the fish were wrapped in aluminum foil (dull side to skin). This wrapping method should not have affected mercury concentrations. Quality control procedures for selection of target fish species and compositing of samples followed the General Protocol for Sport Fish Sampling and Analysis developed by OEHHA (Gassel and Brodberg, 2005). Gassel, M. and R.K. Brodberg. 2005. General Protocol for Sport Fish Sampling and Analysis. California Environmental Protection Agency, Office of Environmental Health Hazard Assessment (OEHHA), Pesticide and Environmental Toxicology Branch. December 2005. | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 22561 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 31 | ||||
| Number of Exceedances: | 24 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at two locations from Indian Valley Reservoir. A total of 24 out of 31 samples exceeded the USEPA fish tissue criterion for human health. 1) Indian Valley Reservoir, North: The average wet weight mercury concentration in fish tissue was 0.60 ppm for the 28 samples collected at this location. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Carp- 5 samples, 0.33-0.54 ppm (average 0.46 ppm), 5 exceedances; Channel Catfish- 7 samples, 0.19-0.91 ppm (average 0.44 ppm), 5 exceedances; Largemouth Bass- 12 samples, 0.52-1.14 ppm (average 0.85 ppm), 12 exceedances; Redear Sunfish- 4 samples, 0.25-0.41 ppm (average 0.31 ppm), 1 exceedance. 2) Indian Valley Reservoir, South: Three Pumpkinseed samples were collected for tissue analysis at this location. One of the 3 samples exceeded the USEPA fish tissue criterion for human health. The wet weight mercury concentrations of the 3 samples ranged from 0.23 ppm to 0.32 ppm, with an average of 0.28 ppm. All 31 samples were collected from fish with total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. | ||||
| Data Reference: | Fish Mercury Project, Year 2 Annual Report, Sport Fish Sampling and Analysis. Final Report. October 2007 | ||||
| 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. The 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: | The USEPA Fish Tissue Residue Criterion for methylmercury in fish is 0.3 mg/kg (0.3 ppm) for the protection of human health. This is the concentration in fish tissue that should not be exceeded based on a total fish and shellfish consumption-weighted rate of 0.0175 kg fish/day. (USEPA, 2001) | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at two locations from Indian Valley Reservoir at the northern and southern ends. | ||||
| Temporal Representation: | Fish samples were collected during one sampling event on 8/14/2006. | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Excellent.. Quality Control for all of the elements described in section 6.1.4 of the Policy was conducted in accordance with the Laboratory QAPP developed by Moss Landing Marine Laboratories (MLML, 2005). This data was also collected and analyzed in accordance with the CALFED Mercury Project QAPP (Puckett and van Buuren, 2000). | ||||
| QAPP Information Reference(s): | |||||
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| LOE ID: | 95486 | ||||
| Pollutant: | Mercury | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 4 | ||||
| Number of Exceedances: | 3 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Fish were sampled for tissue analysis at one location from Indian Valley Reservoir. A total of 3 out of 4 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.38 ppm for the 4 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species:
Channel Catfish- 2 composite samples, 0.19 and 0.34 ppm, 1 exceedance; Largemouth Bass- 2 composite samples, 0.32 and 0.67 ppm, 2 exceedances. All 4 composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families. |
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| Data Reference: | Mercury Contamination in Fish from Northern California Lakes and Reservoirs. State of California. The Resources Agency. Department of Water Resources. Northern District. July 2007 | ||||
| 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. (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 U.S. EPA 304(a)-recommended water quality criterion for concentrations of methylmercury in fish tissue of trophic level 4 fish (150 - 500 mm; fillet wet weight) is 0.20 mg/Kg. | ||||
| Guideline Reference: | Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001 | ||||
| Spatial Representation: | Samples were collected at one location from Indian Valley Reservoir near the spillway. | ||||
| Temporal Representation: | Fish samples were collected during the spring and summer of 2000 and 2001. | ||||
| Environmental Conditions: | Significant mercury mining activity occurred within the Indian Valley Reservoir watershed (USGS, 2005). | ||||
| QAPP Information: | Data quality: Excellent.. Quality control for sample collection, preparation, handling, and analyses were conducted in accordance with the Surface Water Ambient Monitoring Program Quality Assurance Program Plan (Puckett, 2002) with the following exception: instead of wrapping fish in Teflon sheets before being frozen and transported to the laboratory, the fish were wrapped in aluminum foil (dull side to skin). This wrapping method should not have affected mercury concentrations. Quality control procedures for selection of target fish species and compositing of samples followed the General Protocol for Sport Fish Sampling and Analysis developed by OEHHA (Gassel and Brodberg, 2005). Gassel, M. and R.K. Brodberg. 2005. General Protocol for Sport Fish Sampling and Analysis. California Environmental Protection Agency, Office of Environmental Health Hazard Assessment (OEHHA), Pesticide and Environmental Toxicology Branch. December 2005. | ||||
| QAPP Information Reference(s): | |||||