Water Body Name: | Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
Water Body ID: | CAR6031005120080816102743 |
Water Body Type: | River & Stream |
DECISION ID |
78061 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
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Pollutant: | Manganese |
Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Revised |
Sources: | Source Unknown |
Expected TMDL Completion Date: | 2025 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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, two which evaluate water data for the MUN beneficial use and one which evaluates water data for the COLD beneficial use. There are no standards for the protection of aquatic life from manganese and this LOE should be removed from the next iteration of this decision. 11 of 13 samples exceed the objective for the MUN beneficial use assessment. 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. 11 of 13 samples exceeded the objective for the MUN beneficial use assessment 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 Staff 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. |
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LOE ID: | 133355 | ||||
Pollutant: | Manganese | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by CalTrout from one sampling locations on Mammoth Creek (Twin Lakes outlet to Old Mammoth Road). 3 of 3 manganese samples exceeded the secondary maximum contaminant level of 0.05 mg/L. Concentrations ranged from 0.066 mg/L to 0.136 mg/L. | ||||
Data Reference: | Upper Owens River Water Quality Project Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Lahontan Region¦s Objective for Municipal and Domestic Supply uses of inland surface waters states that waters designated as MUN shall not contain concentrations of chemical constituents in excess of the maximum contaminant level (MCL) or secondary maximum contaminant level (SMCL). The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data were collected from one station: 160MAM040 | ||||
Temporal Representation: | Data were collected between June and October 2012. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data were collected in accordance with the CalTrout Upper Owens River QAPP. | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan (QAPP) for Upper Owens River Water Quality Project Data | ||||
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LOE ID: | 7220 | ||||
Pollutant: | Manganese | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total manganese ranged from 34 to 157 ug/L. Eight samples exceeded the MCL. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for manganese is 50 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7219 | ||||
Pollutant: | Manganese | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved manganese in 10 samples ranged from 13.7 to 157 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal standards or criteria for manganese for the protection of freshwater aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75912 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
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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 | Revised |
Sources: | Source Unknown | Unknown Nonpoint Source | Unknown Point Source |
Expected TMDL Completion Date: | 2025 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | This pollutant is being considered for removal from the section 303(d) list under section 4.1 and 4.5 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status.
Seven lines of evidence, three which evaluate water data for the MUN beneficial use, three which evaluate water data for the COLD beneficial use and one which evaluates fish tissue data for the COMM beneficial use are available in the administrative record to assess this pollutant. Two out of three fish tissue samples exceed the objectives for the COMM beneficial use. 5 of 34 water samples exceed the objective for the MUN beneficial use. 0 of 34 samples exceed the objective for the COLD beneficial use. 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 section 303(d) list in the Water Quality Limited Segments category. 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 Policy. 2. The data used satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. 2 of 3 fish tissue samples and 5 of 34 water samples exceed the objective for the MUN beneficial use, and these data are sufficient to recommend leaving this waterbody/pollutant combination on the 303(d) list. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Staff 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. |
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LOE ID: | 9114 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station between 2001 and 2005 under the Region 6 SWAMP program. Concentrations of dissolved mercury in 8 of 10 samples were below the detection level, and a ninth sample was an estimated value. One sample had a dissolved mercury concentraiton of 0.01 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal criteria for dissolved mercury for the protection of aquatic life. The U.S. Environmental Protection Agency's freshwater aquatic life criteria are expressed as total mercury. | ||||
Objective/Criterion Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 9115 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station between 2001 and 2005 under the Region 6 SWAMP program. Concentrations of dissolved mercury in 8 of 10 samples were below the detection level, and a ninth sample was an estimated value. One sample had a dissolved mercury concentraiton of 0.01 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal criteria for dissolved mercury for the protection of human health. | ||||
Objective/Criterion Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 9112 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station between 2001 and 2005 under the Region 6 SWAMP program. One of 10 samples for total mercury was an estimated value. Mercury concentrations in the remaining samples ranged from 0.02 to 0.08 mg/L. Three samples exceeded the CTR standard. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule (CTR) human health standard for consumption of water and organisms is 0.05 ug/L total mercury as a 30-day average. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 133349 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by CalTrout between June 2012 and July 2013 from five sampling locations distributed along Mammoth Creek (Twin Lake outlet to Old Mammoth Road) segment. One sample was removed from the assessment because it did not pass the quantitation checks required by this report. 0 of the remaining 14 samples exceeded the 0.77 ug/L evaluation guideline for the protection of aquatic life. Concentrations of mercury in this segment of Mammoth Creek ranged from 0.00109ug/L to 0.0581 ug/L. | ||||
Data Reference: | Upper Owens River Water Quality Project Data | ||||
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, Lahontan Region). | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L. | ||||
Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. | ||||
Spatial Representation: | Data were collected from five stations along this segment of Mammoth Creek: 160MAM040, 160MAM042, 160MAM044, 160MAM046, 160MAM048 | ||||
Temporal Representation: | Data were collected approximately every two months between June 2012 and July 2013. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data were collected in accordance with the CalTrout Upper Owens River QAPP | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan (QAPP) for Upper Owens River Water Quality Project Data | ||||
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LOE ID: | 9113 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station between 2001 and 2005 under the Region 6 SWAMP program. One of 10 samples for total mercury was an estimated value. Mercury concentrations in the remaining samples ranged from 0.02 to 0.08 mg/L. The aquatic life criteria were not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The U.S. Environmental Protection Agency's national freshwater aquatic life criteria (for total mercury) include a 4-day average of 0.77 ug/L and a 1-hour average of 1.4 ug/L. | ||||
Objective/Criterion Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 6961 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Two out of 3 samples exceeded. Three filet composite samples of brown trout were collected in 1992, 1995, and 2002. The 1992 and 2002 samples exceeded the guideline (TSMP, 2002). | ||||
Data Reference: | Toxic Substances Monitoring Program data for years 1992-2002 and Coastal Fish Contamination Program for years 1 and 2. State Water Resources Control Board | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Lahontan RWQCB Basin Plan: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or produce detrimental physiological responses in human, plant, animal, or aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | 0.3 ug/g (OEHHA Screening Value) (Brodberg & Pollock, 1999). | ||||
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment | ||||
Spatial Representation: | Two stations were sampled: 1.3 miles downstream from Old Mammoth Road on Old State Road and between Hwy 395 and frontage road east of Hwy 395. | ||||
Temporal Representation: | Samples were collected annually in 1992, 1995, and 2002. | ||||
Environmental Conditions: | |||||
QAPP Information: | Toxic Substances Monitoring Program 1992-93 and 1994-95 Data Reports.
Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game. |
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QAPP Information Reference(s): | |||||
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LOE ID: | 133343 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by CalTrout between June 2012 and July 2013 from five sampling locations distributed along Mammoth Creek (Twin Lake outlet to Old Mammoth Road) segment. One sample was removed from the assessment because it did not pass the quantitation checks required by this report. 2 of the remaining 14 samples exceeded the 0.050ug/L California Toxics Rule (CTR) water quality objective. Concentrations of mercury in this segment of Mammoth Creek ranged from 0.00109ug/L to 0.0581 ug/L. The two exceedances of the objective were recorded upstream of the Club Drive culvert (160MAM044) station and at Snowcreek Meadow Reserve (160MAM048) station | ||||
Data Reference: | Upper Owens River Water Quality Project Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The mercury criteria for the protection of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data were collected from five stations along this segment of Mammoth Creek: 160MAM040, 160MAM042, 160MAM044, 160MAM046, 160MAM048 | ||||
Temporal Representation: | Data were collected approximately every two months between June 2012 and July 2013. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data were collected in accordance with the CalTrout Upper Owens River QAPP | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan (QAPP) for Upper Owens River Water Quality Project Data | ||||
DECISION ID |
71360 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
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Pollutant: | Indicator Bacteria |
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)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status.
Eleven lines of evidence, four which assess E. coli data against the REC-1 beneficial use and seven which assess fecal coliform data against the MUN beneficial use (6) and the REC-1 beneficial use (1), are available in the administrative record to assess this pollutant. 0 of 49 E. coli samples and 8 of 83 fecal coliform samples exceed the water quality objectives. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 49 E. coli samples exceeded the water quality 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 Staff 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. |
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LOE ID: | 96930 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by Lahontan staff for the Surface Water Ambient Monitoring Program (SWAMP) RWB6 Monitoring program, and for a supplemental TMDL Integrated Report Special Study. The TMDL Special Study was developed by Lahontan Planning and SWAMP staff to provide additional data to the quarterly SWAMP monitoring. The purpose was to gain a better temporal understanding of levels of specific pollutants in the waterbody. To ensure the two datasets could be viably analyzed as one, the TMDL Special Study followed the same sampling protocol as SWAMP. Accordingly, the two datasets have been combined for this assessment to reflect the intended design and to best characterize conditions in the watershed. Water Board staff determined beneficial use support, and the results are as follows: 0 of 1 samples exceeded exceeded the geomean water quality standard for E. coli. This is a six week rolling geomean that is calculated weekly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the SWAMP RWB6 Monitoring (tissue and water). | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective applicable to all waters, except Lake Tahoe, where the salinity is less than 10 parts per thousand (ppth) 95 percent or more of the time is a six-week rolling GEOMETRIC MEAN (GM) of Escherichia coli (E. coli) not to exceed 100 colony forming units per 100 milliliters (cfu/100 mL) (calculated weekly) | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site, station: 630MAM014 | ||||
Temporal Representation: | The samples were collected between the days of 2011-15-16 and 2016-07-12 . | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. | ||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
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LOE ID: | 129144 | ||||
Pollutant: | Fecal Coliform | ||||
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: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Eastern Sierra Ambient Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the logmean water quality standard for Coliform, Fecal. This is a 30-day rolling logmean that is calculated daily. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Eastern Sierra Ambient Monitoring. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml. (Lahontan Region Basin Plan) | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2012-07-25 and 2013-10-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology (SNARL - CESAME) | ||||
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LOE ID: | 129461 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 13 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Eastern Sierra Ambient Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 13 samples exceeded the water quality standard for Coliform, Fecal. The water quality standard is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Eastern Sierra Ambient Monitoring. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. (Lahontan Region Basin Plan) | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2012-07-25 and 2013-10-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology (SNARL - CESAME) | ||||
|
|||||
LOE ID: | 7176 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | Water column surveys (e.g. fecal coliform) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2004 and 2005. Bacteria counts in two of five quarterly samples were below the detection level. Two samples were estimated values, and the count in the remaining sample was 44 colonies per 100 mL, in violation of the objective. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's objective for coliform bacteria states: "Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected as evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Five quarterly samples were collected between July 2004 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7177 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | Water column surveys (e.g. fecal coliform) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2004 and 2005. Bacteria counts in two of five quarterly samples were below the detection level. Two samples were estimated values, and the count in the remaining sample was 44 colonies per 100 mL, in violation of the objective. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's objective for coliform bacteria states: "Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected as evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Five quarterly samples were collected between July 2004 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 100109 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 13 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Eastern Sierra Ambient Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 13 samples exceeded the Statistical Threshold Value (STV) water quality standard for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Eastern Sierra Ambient Monitoring. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective applicable to all waters, except Lake Tahoe, where the salinity is less than 10 parts per thousand (ppth) 95 percent or more of the time is a STATISTICAL THRESHOLD VALUE (STV) of 320 cfu/100 mL not to be exceeded more than 10 percent of the time (calculated monthly). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2012-07-25 and 2013-10-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan Sierra Nevada Aquatic Research Laboratory Center for Eastern Sierra Aquatic Microbial Ecology (SNARL - CESAME) | ||||
|
|||||
LOE ID: | 129221 | ||||
Pollutant: | Fecal Coliform | ||||
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: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed RWB6_BACT_Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality standard for Coliform, Fecal. The water quality standard is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Regional Water Board 6 Bacteria Monitoring. | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. (Lahontan Region Basin Plan) | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2014-05-12 and 2014-05-12 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
|
|||||
LOE ID: | 99728 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed RWB6_BACT_Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the Statistical Threshold Value (STV) water quality standard for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Regional Water Board 6 Bacteria Monitoring. | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective applicable to all waters, except Lake Tahoe, where the salinity is less than 10 parts per thousand (ppth) 95 percent or more of the time is a STATISTICAL THRESHOLD VALUE (STV) of 320 cfu/100 mL not to be exceeded more than 10 percent of the time (calculated monthly). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2014-05-12 and 2014-05-12 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
|
|||||
LOE ID: | 96946 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 42 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by Lahontan staff for the Surface Water Ambient Monitoring Program (SWAMP) RWB6 Monitoring program, and for a supplemental TMDL Integrated Report Special Study. The TMDL Special Study was developed by Lahontan Planning and SWAMP staff to provide additional data to the quarterly SWAMP monitoring. The purpose was to gain a better temporal understanding of levels of specific pollutants in the waterbody. To ensure the two datasets could be viably analyzed as one, the TMDL Special Study followed the same sampling protocol as SWAMP. Accordingly, the two datasets have been combined for this assessment to reflect the intended design and to best characterize conditions in the watershed. 42 geomeans could be computed from the raw data, 6 of which exceeded the water quality objective of 20CFU/100mL. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the SWAMP RWB6 Monitoring (tissue and water). | ||||
Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the TMDL Integrated Report Special Study. | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's objective for coliform bacteria states: "Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected as evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data were collected from one site, stations: 603MAM014 | ||||
Temporal Representation: | Data were collected between days 2010-23-9 and 2016-7-12 | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. This reach of the creek is affected by recreation and some urban development. | ||||
QAPP Information: | Data were collected in accordance with the SWAMP QAPP. | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
|
|||||
LOE ID: | 96929 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Statistical Threshold Value | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 33 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by Lahontan staff for the Surface Water Ambient Monitoring Program (SWAMP) RWB6 Monitoring program, and for a supplemental TMDL Integrated Report Special Study. The TMDL Special Study was developed by Lahontan Planning and SWAMP staff to provide additional data to the quarterly SWAMP monitoring. The purpose was to gain a better temporal understanding of levels of specific pollutants in the waterbody. To ensure the two datasets could be viably analyzed as one, the TMDL Special Study followed the same sampling protocol as SWAMP. Accordingly, the two datasets have been combined for this assessment to reflect the intended design and to best characterize conditions in the watershed. Water Board staff determined beneficial use support, and the results are as follows: 0 of the 33 samples exceeded exceeded the Statistical Threshold Value (STV) water quality standard for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the SWAMP RWB6 Monitoring (tissue and water). | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective applicable to all waters, except Lake Tahoe, where the salinity is less than 10 parts per thousand (ppth) 95 percent or more of the time is a STATISTICAL THRESHOLD VALUE (STV) of 320 cfu/100 mL not to be exceeded more than 10 percent of the time (calculated monthly). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site, station: 630MAM014 | ||||
Temporal Representation: | The samples were collected between the days of 2011-15-16 and 2016-07-12 . | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. | ||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
|
|||||
LOE ID: | 129121 | ||||
Pollutant: | Fecal Coliform | ||||
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: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed RWB6_BACT_Monitoring data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the logmean water quality standard for Coliform, Fecal. This is a 30-day rolling logmean that is calculated daily. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Regional Water Board 6 Bacteria Monitoring. | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml. (Lahontan Region Basin Plan) | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 2 monitoring site(s), station(s): MAM.10, MAM.20 | ||||
Temporal Representation: | The samples were collected between the days of 2014-05-12 and 2014-05-12 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
DECISION ID |
71315 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
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: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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 fifteen samples exceed the MUN 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 fifteen samples exceeded the 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 Staff 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. |
|
|||||
LOE ID: | 8845 | ||||
Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. One of 10 samples for nitrite plus nitrate was below the detection level and one was an estimated value. Concentrations in the remaining 8 samples ranged from 0.001 to 0.058 mg/L. the MCL was not exceeded.. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for nitrite plus nitrate is 10 mg/L, expressed "as N." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 133358 | ||||
Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water quality samples were collected at one location on a monthly basis between 6/12/2012 and 10/9/2012 | ||||
Data Reference: | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters designated as MUN shall not contain concentrations of chemical constituents in excess of the maximum contaminant level or secondary maximum contaminant level based upon drinking water standards specified in Title 22 of the California Code of Regulations.The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, Lahontan Region is 10.0 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected at one location with station code 16MAM040 and site description of upstream of Sherwin St. Bridge. | ||||
Temporal Representation: | Samples were collected monthly between 6/12/2012 and 10/9/2012. | ||||
Environmental Conditions: | |||||
QAPP Information: | Upper Owens Monitoring by CalTrout (need to add) | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71257 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Nitrogen |
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)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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 five samples exceed the site specific objective for total nitrogen. 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 five samples exceeded the site specific 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 Staff 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. |
|
|||||
LOE ID: | 133365 | ||||
Pollutant: | Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water quality samples were collected at one location along Mammoth Creek on a monthly basis between 6/12/2012 and 10/9/2012 which results in one annual average. | ||||
Data Reference: | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Lahontan Basin in Table 3-17 specifies a site specific objective for Mammoth Creek at Old Mammoth Road for Total Nitrogen as N of 0.6 mg/L applied as an annual average. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Water quality samples were collected at one location along Mammoth Creek at stations 160MAM040. | ||||
Temporal Representation: | Water quality samples were collected on a monthly basis between 6/12/2012 and 10/9/2012. | ||||
Environmental Conditions: | |||||
QAPP Information: | to be added | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 8848 | ||||
Pollutant: | Total Nitrogen as N | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Total nitrogen was calculated from 10 samples each for total Kjeldahl nitrogen (TKN) and nitrite plus nitrate. Two of the calculations were estimated values due to below detection level and estimated values in the basic data. The remainder ranged from 0.100 to 0.258 mg/L total nitrogen. The objective was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The applicable site-specific objective (from Basin Plan Table 3-17) includes an annual average total nitrogen concentration of 0.6 mg/L and a 90th percentile value of 1.0 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
2007. SWAMP Data for the Owens Hydrologic Unit | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected for TKN and nitrite plus nitrate between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71206 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Nitrogen, Nitrate |
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)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. None of the samples or annual average datapoints exceeds the applicable 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 samples samples exceeded the California Maximum Contaminant Level. None of 4 annual average datapoints exceeded the site-specific 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8849 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Nitrate "as N" was calculated from 10 samples each for nitrite and nitrite plus nitrate. The calculations included one below detection level value and one estimated value. Concentrations of nitrate as N in the remaining calculated values ranged from 0 to 0.057 mg/L. When expressed "as nitrate" the maximum value was 0.257 mg/L. The objective was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The applicable site-specific objective (from Basin Plan Table 3-17) includes an annual average "nitrate as nitrate" concentration of 0.4 mg/L and a 90th percentile value of 0.8 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected for nitrite and nitrite plus nitrate between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 8851 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Nitrate "as N" was calculated from 10 samples each for nitrite and nitrite plus nitrate. The calculations included one below detection level value and one estimated value. Concentrations of nitrate as N in the remaining calculated values ranged from 0 to 0.057 mg/L. When expressed "as nitrate" the maximum value was 0.257 mg/L. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for nitrate is 45 mg/L exprssed "as nitrate." This is equivalent to 10 mg/L expressed "as N." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected for nitrite and nitrite plus nitrate between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71770 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Nitrogen, Nitrite |
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)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceeds the California Maximum Contaminant Level (MCL). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 samples exceeded the MCL 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8844 | ||||
Pollutant: | Nitrite as Nitrite NO2 | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Two of 10 nitrite samples were below the detection level; the remaining samples' nitrite concentrations ranged from 0.001 to 0.002 mg/L. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for nitrite is 1 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71884 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Turbidity |
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)(2016) |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | This pollutant is being considered for placement on the 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.
Five lines of evidence, four which assess the available data for the COLD beneficial use and one which assesses the data for the MUN beneficial use are available in the administrative , record to assess this pollutant. For the COLD beneficial use assessment, separate lines of evidence were prepared for data expressed as NTU and NTRU. The two types of units are measured differently and are not directly comparable. There are no specific state or federal standards or criteria for turbidity expressed as NTRU. None of the samples expressed as NTU exceed the Maximum Contaminant level. The Lahontan Basin Plan's narrative turbidity objective is a non-degradation objective, and sample numbers are insufficient to establish baseline conditions or detect trends as required under Listing Policy Section 3.10. 0 of 2 samples exceed the objective for the MUN beneficial use. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 5 samples expressed as NTU exceeded the Maximum Contaminant Level; 0 of 2 samples exceed the objective for the MUN beneficial use and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. These sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples per beneficial use assessed are 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 Staff 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. |
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LOE ID: | 97307 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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 TMDL Integrated Report Special Study data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Turbidity. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the TMDL Integrated Report Special Study. | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water designated as MUN shall not contain concentrations of chemical constituents in excess of the maximum contaminant level (MCL) or secondary maximum contaminant level (SMCL) based upon drinking water standards specified in Title 22 of the California Code of Regulations. The Lahontan Basin Plan also has regionwide turbidity objective for other beneficial uses that states: Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10%. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | California Maximum Contaminant Levels (MCLs) apply to ambient surface waters under the Lahontan Basin Plan's \Chemical Constituents\" objective. The Secondary MCL for turbidity is 5 NTU. Calculation of a numeric objective for other beneficial uses requires comparison with upstream or other background data which may not be available as part of the data used for water quality assessment. " | ||||
Guideline Reference: | California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring | ||||
Spatial Representation: | The samples were collected at 1 monitoring site(s) (603MAM014) | ||||
Temporal Representation: | The samples were collected between the dates of 2015-09-14 and 2015-11-12 | ||||
Environmental Conditions: | |||||
QAPP Information: | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
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LOE ID: | 8841 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2004. (No samples were collected in 2002.) Turbidity in two of five samples was below the detection level. The remaining samples ranged from 2.1 to 3.2 NTU. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for turbidity is 5 NTU. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Five turbidity measurements expressed as NTU were taken between 2001 and 2004. No measurements were taken in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 8843 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey measured turbidity as NTRU quarterly under the Region 6 SWAMP program between 2004 and 2005. All four samples were below the detection level. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The drinking water Maximum Contaminant Level is expressed as NTU. There are no standards or criteria for turbidity as NTRU for the protection of human health. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Four quarterly turbidity measurements expressed as NTRU were taken in 2004 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 8842 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey measured turbidity as NTRU quarterly under the Region 6 SWAMP program between 2004 and 2005. All four samples were below the detection level. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's regionwide turbidity objective states:
"Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10 percent." |
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Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Four quarterly turbidity measurements expressed as NTRU were taken in 2004 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 8840 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2004. (No samples were collected in 2002.) Turbidity in two of five samples was below the detection level. The remaining samples ranged from 2.1 to 3.2 NTU. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's regionwide turbidity objective states:
"Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10 percent." |
||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Five turbidity measurements expressed as NTU were taken between 2001 and 2004. No measurements were taken in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71204 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Total Dissolved Solids |
Final Listing Decision: | 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)(2016) |
Revision Status | Revised |
Sources: | Source Unknown |
Expected TMDL Completion Date: | 2031 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | This pollutant is being considered for placement on the 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, two which assess the available data for the COLD beneficial use and one which assesses the available data for the MUN beneficial use, are available in the administrative record to assess this pollutant. 7 of 7 samples exceed the water quality objective for the COLD beneficial use; 0 of 10 samples exceed the objective for the MUN beneficial use. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. 7 of 7 samples exceed the site-specific water quality objective for the COLD beneficial use and this exceeds 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 Staff Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
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LOE ID: | 7245 | ||||
Pollutant: | Total Dissolved Solids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Concentrations of TDS in ten quarterly samples ranged from 44 to 136 mg/L. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The recommended MCL for Total Dissolved Solids (TDS) is 500 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected approximately quarterly between 2001 and 2005. (No samples were collected in 2002.) | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 96597 | ||||
Pollutant: | Total Dissolved Solids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data were collected by Lahontan staff for the Surface Water Ambient Monitoring Program (SWAMP) RWB6 Monitoring program, and for a supplemental TMDL Integrated Report Special Study. The TMDL Special Study was developed by Lahontan Planning and SWAMP staff to provide additional data to the quarterly SWAMP monitoring. The purpose was to gain a better temporal understanding of levels of specific pollutants in the waterbody. To ensure the two datasets could be viably analyzed as one, the TMDL Special Study followed the same sampling protocol as SWAMP. Accordingly, the two datasets have been combined for this assessment to reflect the intended design and to best characterize conditions in the watershed. Data for the projects were collected by Lahontan Water Board staff under the same protocol and using the same monitoring station for both projects. Data were collected between November 2014 and December 2016 with approximately once per month frequency. Concentrations in the raw data ranged from 68 to 220 mg/L. Three annual averages were computed from data, all of which exceeded the site specific objective. | ||||
Data Reference: | Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the SWAMP RWB6 Monitoring (tissue and water). | ||||
Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the TMDL Integrated Report Special Study. | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The site-specific objective for Total Dissolved Solids (TDS) in Mammoth Creek (Twin Lakes outlet to Old Mammoth Road), as referenced in the Lahontan Basin Plan Table 3-17, is an annual average not to exceed 85 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data were collected at site 603MAM014, which is found in Mammoth City Park next to Old Mammoth Road. | ||||
Temporal Representation: | Data were collected starting in November 2014 and were predominately collected on a per month basis. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The Twin Lakes outlet to Old Mammoth Road reach drains the headwaters segment and flows through the town of Mammoth, passing through several residential neighborhoods and Mammoth Park. | ||||
QAPP Information: | Data were collected in accordance with the SWAMP QAPP. | ||||
QAPP Information Reference(s): | Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program | ||||
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LOE ID: | 7240 | ||||
Pollutant: | Total Dissolved Solids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. (No samples were collected in 2002.) Concentrations of TDS in 10 samples ranged from
44 to 136 mg/L. Annual averages (calculated from 1 to 4 samples per year) ranged from 97 to 127 mg/L. The annual average objective was exceeded in 4 out of 4 years. |
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Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The site-specific objective for Total Dissolved Solids (TDS) at this station (from Lahontan Basin Plan Table 3-17) includes an annual average TDS concentration of 85 mg/L; and a 90th percentile value of 115 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected quarterly in 2001 and from 2003 to 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development¿ and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
77004 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Metals |
Final Listing Decision: | Delist from 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Delist from 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Reason for Delisting: | Change from general pollutant to specific pollutant listing (e.g. metals to copper) |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for removal on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: Mammoth Creek as a whole was listed for "Metals" in the early 1990s on the basis of fish tissue data from the State Water Resources Control Board's Toxic Substances Monitoring Program (TSMP). The TSMP results included "Elevated Data Levels" (EDLs) for several metals. EDLs were statistically high compared to other data statewide, but did not exceed human fish consumption criteria, including the then-applicable OEHHA criteria. In 1998 the State Water Board provided the opportunity to remove listings for TSMP data that did not exceed human consumption criteria. Mammoth Creek was not recommended to be delisted for "Metals" at the time because Lahontan Water Board staff wanted to investigate stormwater impacts on the creek. In 2006, the State Water Board listed Mammoth Creek as a whole for mercury due to exceedance of the newer OEHHA "screening value" for tissue. State Board staff did not identify exceedances of human consumption criteria for other metals. For the 2008 assessment cycle, Mammoth Creek has been divided into three segments. No additional new listings for specific metals are being recommended on the basis of tissue or water data. The general "metals" listing for the creek as a whole is not recommended to be carried over to this segment because a specific listing for mercury is in place. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 6964 | ||||
Pollutant: | Metals | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference pre-2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Unspecified | ||||
Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Unspecified | ||||
Temporal Representation: | Unspecified | ||||
Environmental Conditions: | Unspecified | ||||
QAPP Information: | Unspecified | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71368 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Aluminum |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the federal aquatic life criteria or the California primary or secondary Maximum Contaminant Levels (MCLs). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of the samples exceeded the MCLs or the federal freshwater aquatic life criteria 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7199 | ||||
Pollutant: | Aluminum | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Of 10 dissolved aluminum samples, three were estimated values. The remaining samples had both dissolved aluminum concentrations ranging from 1 to 6 ug/L. The criteria were not violated | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The U.S. Environmental Protection Agency's national water quality criteria for aluminum for the protection of freshwater aquatic life are a 4-day average of 87 ug/L and a 1-hour average of 750 ug/L. | ||||
Objective/Criterion Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 samples per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7200 | ||||
Pollutant: | Aluminum | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total aluminum in 10 samples ranged from 6 to 88 ug/L The MCLs were not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The primary MCL for aluminum is 1000 ug/L and the secondary MCL is 200 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71155 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Antimony |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the applicable criteria and 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved antimony samples exceeded the federal aquatic life criteria. None of 10 total antimony samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7234 | ||||
Pollutant: | Antimony | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. All of 10 samples for total antimony were below the detection level. Under Section 6.1.5.5 of the Listing Policy, the MCL is considered to be attained. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for antimony is 6 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7233 | ||||
Pollutant: | Antimony | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved antimony were below detection level in 8 of 10 samples. One sample was an estimated value and the antimony concentration in the remaining sample was 0.1 ug/L.. The criteria were not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The USEPA Lowest Observed Effect Levels (LOEL) criteria for protection of aquatic life include an acute antimony value of 9000 ug/L, a chronic value of 1600 ug/L and a limit for toxicity to algae of 610 ug/L | ||||
Objective/Criterion 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. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. . | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
80252 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Arsenic |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the applicable water quality standard. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. None of 10 dissolved arsenic samples exceeded the California Toxics Rule standards. None of 10 total arsenic samples exceeded the Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7201 | ||||
Pollutant: | Arsenic | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. One of 10 quarterly samples was an estimated value. Concentrations of dissolved arsenic in the remaining 9 samples ranged from 2 to 4 ug/L. The California Toxics Rule standards were not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule arsenic standards for the protection of freshwater aquatic life are as follows:
4-day average = 150 ug/L 1-hour average = 340 ug/L. |
||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the ¿Spawning, Reproduction and Development¿ and Migration of Aquatic Organisms beneficial uses. Arsenic in this watershed comes from natural volcanic and geothermal sources. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7202 | ||||
Pollutant: | Arsenic | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. In 10 samples collected approximately quarterly, concentrations of total arsenic ranged from 2 to 5 ug/L. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for arsenic is 10 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71205 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Beryllium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. There are no applicable standards or criteria for dissolved beryllium. None of the total beryllium samples exceeds the California Maximum Contaminant Level. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of the total beryllium samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7204 | ||||
Pollutant: | Beryllium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total beryllium in 9 of 10 samples were below the detection level. The tenth sample was an estimated value. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The California MCL for beryllium is 4 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples 1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7203 | ||||
Pollutant: | Beryllium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved beryllium in 10 quarterly samples were below the detection level. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal standards or criteria for dissolved beryllium for the protection of freshwater aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoty Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71463 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the site specific water quality objective or the California State Notification Level criterion. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 4 samples exceeded the site-specific objective or the California State Notification Level criterion and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7206 | ||||
Pollutant: | Boron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between July 28, 2004 and July 21, 2004. The concentration of dissolved boron in one of four samples was below the detection level. Another sample was an estimated value. The dissolved boron concentrations in the two remaining samples were 8.3 and 11 ug/L. The criterion was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California State Notification Level criterion for boron is 1000 ug/L. | ||||
Objective/Criterion Reference: | Drinking Water Notification and Response Levels: An Overview | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Four samples were collected approximately quarterly between July 2004 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 8837 | ||||
Pollutant: | Boron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between July 28, 2004 and July 21, 2005. The concentration of dissolved boron in one of four samples was below the detection level. Another sample was an estimated value. The dissolved boron concentrations in the two remaining samples were 8.3 and 11 ug/L. The site specific objective was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The site-specific objective for Mammoth Creek at Highway 395 (in Lahontan Basin Plan Table 3-17) applies to this station through the Tributary Rule. It includes an annual average boron concentration of 0.03 mg/L and a 90th percentile value of 0.05 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Four samples were collected approximately quarterly between July 2004 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71764 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Cadmium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples for total or dissolved cadmium exceeds the applicable standard. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved cadmium samples exceeded the California Toxics Rule standards. None of 10 total cadmium samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7208 | ||||
Pollutant: | Cadmium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total cadmium in 9 of 10 samples were below the detection level. A tenth sample was an estimated value. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The California MCL for cadmium is 5 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7207 | ||||
Pollutant: | Cadmium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Concentrations of dissolved cadmium in 10 samples were all below the detection level. Per listing policy Section 6.1.5.5 the California Toxics Rule standards are assumed to be attained. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for cadmium are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard ranges from 0.74 to 2.96 ug/L. The chronic toxicity standard ranges from 0.66 to 1.74 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Twelve samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71938 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Calcium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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 of evidence are available in the administrative record to assess this pollutant. There are no applicable California or federal standards or criteria for calcium. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. There are no applicable standards or criteria and the data cannot be assessed using 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7195 | ||||
Pollutant: | Calcium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of total calcium in 10 samples ranged from 5.14 to 17.4 mg/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for calcium. It is generally monitored as a component of another water quality parameter such as hardness, Total Dissolved Solids, or Sodium Adsorption Ratio. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten quarterly samples were collected between August 2001 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7194 | ||||
Pollutant: | Calcium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved calcium in 10 samples ranged from 5.88 to 16.4 mg/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for calcium. It is generally monitored as a component of another water quality parameter such as hardness, Total Dissolved Solids, or Sodium Adsorption Ratio. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten quarterly samples were collected between August 2000 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71359 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Chloride |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. None of the samples or annual average datapoints exceeds the applicable standards. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 4 annual average datapoints exceeded the site-specific objective. At least 5 annual average datapoints are needed for assessment with Listing Policy Table 3.2. None of 10 samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 8860 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Ten chloride samples included one estimated and one below detection level value. Concentrations in the remaining samples ranged from 0.24 to 1.06 mg/L. One of four calculated annual averages was an estimated value; the others were 0.51, 0.60 and 0.69 mg/L. The objective was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The applicable site-specific objective (from Basin Plan Table 3-17) includes an annual average chloride concentration of 0.8 mg/L and a 90th percentile value of 1.4 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 8861 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Ten chloride samples included one estimated and one below detection level value. Concentrations in the remaining samples ranged from 0.24 to 1.06 mg/L. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCLfor chloride is 250 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
78811 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Chlorpyrifos |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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 are is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant; however, the result was not used in the assessment because the laboratory method detection limit was above the guideline and the result was non-detect. Therefore the results could not be used to determine if the sample results exceeded the water quality guidelines. 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. The result was not used in the assessment because the laboratory method detection limit was above the guideline so compliance with the guideline could not be determined. This sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 16 samples is needed for application of 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 44367 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | One sample result was not used in the assessment because the laboratory method detection limit was above the guideline and the result was non-detect. Therefore the results could not be quantified with the level of certainty required by the Listing Policy. | ||||
Data Reference: | Statewide Project Urban Pyrethroid Status Monitoring | ||||
SWAMP Data: | 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. (Basin Plan). | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | There is no chlorpyrifos evaluation guideline specific to "sediment, interstitial water" (pore water). The following evaluation guideline was used to evaluate an exceedance in water quality standards: the freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005). | ||||
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 Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) was collected at 1 monitoring site [ Mammoth Ck @ Minaret - 603SUP028] | ||||
Temporal Representation: | Data was collected on a single day 10/30/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | The SWAMP QAPP (2008) was followed. | ||||
QAPP Information Reference(s): | Surface Water Ambient Monitoring Program Quality Assurance Program Plan | ||||
DECISION ID |
72111 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Chromium (total) |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the applicable water quality standard(s). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved chromium samples exceeded the California Toxics Rule standards. None of 10 total chromium samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7209 | ||||
Pollutant: | Chromium (total) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of dissolved chromium in 10 samples were all below the detection level. Per listing policy Section 6.1.5.5 the California Toxics Rule standards are assumed to be attained. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for chromium VI are: 4-day average = 11 ug/L; 1 hour average = 16 ug/L). The chromium III standards are hardness dependent. At the hardness levels reported for this station, the acute toxicity standard ranges from 153.50 to 421.35 ug/L. The chronic toxicity standard ranges from 49.80 to 136.68. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2008. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7210 | ||||
Pollutant: | Chromium (total) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total chromium in 10 quarterly samples were all below the detection level. Per listing policy Section 6.1.5.5 the California Toxics Rule standards are assumed to be attained. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for chromium is 50 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72446 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Cobalt |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. There are no applicable California or federal water quality standards or criteria for cobalt. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. There are no applicable standards or criteria and the data cannot be assessed using 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
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LOE ID: | 7212 | ||||
Pollutant: | Cobalt | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved cobalt in 10 samples ranged from 0.033 to 0.091 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for cobalt for the protection of aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between August 2001 and July 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7211 | ||||
Pollutant: | Cobalt | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of total cobalt in 2 of 10 samples were below the detection level. Concentrations in the remaining 8 samples ranged from 0.097 to0.259 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for cobalt for the protection of human health. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between August 2001 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72337 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Copper |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the dissolved copper or total copper samples exceeds the applicable standard(s). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved copper samples exceeded the California Toxics Rules standards. None of 10 total copper samples exceeded. the California Maximum Contaminant Level. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 7214 | ||||
Pollutant: | Copper | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total recoverable copper in 3 of 10 samples were below the detection level. Another three samples were estimated values. Concentrations of total copper in the remaining samples ranged from 0.7 to 1.0 ug/L. The MCLs were not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The primary MCL for copper is 1300 ug/L and the secondary MCL is 1000 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7213 | ||||
Pollutant: | Copper | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Of 10 samples for dissolved copper, 4 were below the detection level, 4 were estimated values, and dissolved copper concentrations in the remaining samples were 0.3 and 0.9 ug/L. The CTR standards were not violated | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for copper are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard ranges from 3.10 to 9.92 ug/L, and the chronic toxicity standard ranges from 2.27 to 6.80 ug/L | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
78859 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Diazinon |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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. None of the sample exceeds 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 do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. None of the sample exceeded the guideline and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 16 samples is needed for application of 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 44385 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold 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 SWAMP data for Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Statewide Project Urban Pyrethroid Status Monitoring | ||||
SWAMP Data: | 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. (Basin Plan). | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | There is no diazinon evaluation guideline specific to "sediment, interstitial water" (pore water). The following evaluation guideline was used to evaluate an exceedance in water quality standards: the freshwater chronic 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 Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) was collected at 1 monitoring site [ Mammoth Ck @ Minaret - 603SUP028] | ||||
Temporal Representation: | Data was collected on a single day 10/30/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | The SWAMP QAPP (2008) was followed. | ||||
QAPP Information Reference(s): | Surface Water Ambient Monitoring Program Quality Assurance Program Plan | ||||
DECISION ID |
71464 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Dissolved oxygen saturation |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. None of the samples exceeds 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the diel, seasonal and annual variability expected in streamflows and dissolved oxygen concentrations in streams of the Lahontan Region. 3. None of 8 samples exceeded the water quality 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 7180 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2003 and 2005. Percent saturation of dissolved oxygen ranged from 96 to 107 percent. The objective was not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's narrative objective states that percent saturation shall not be depressed by more than 10 percent and minimum dissolved oxygen concentration shall not be less than 80 percent saturation. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Eight samples were collected approximately quarterly between October 2003 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71525 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Hardness as CaCO3 |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. There are no applicable state or federal standards or criteria for hardness. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. There are no applicable water quality standards or criteria. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8859 | ||||
Pollutant: | Hardness as CaCO3 | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Hardness in 10 samples ranged from 21.11 to 72.43 mg/L CaCO3. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal standards or criteria for hardness. Hardness is monitored for purposes such as determination of the applicable criteria and standards for metals whose toxicity is hardness-dependent. The U.S. Environmental Protection Agency's 1986 "Gold Book" includes generally accepted categories of hardness. Calcium and magnesium are the major ions contributing to hardness, and hardness is generally expressed as calcium carbonate. Water with a hardness equivalent to 0-75 mg equivalent CaC03/L is considered "soft." | ||||
Objective/Criterion 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. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 8858 | ||||
Pollutant: | Hardness as CaCO3 | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Hardness in 10 samples ranged from 21.11 to 72.43 mg/L CaCO3. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no state or federal standards or criteria for hardness. Hardness is monitored for purposes such as determination of the applicable criteria and standards for metals whose toxicity is hardness-dependent. The U.S. Environmental Protection Agency's 1986 "Gold Book" includes generally accepted categories of hardness. Calcium and magnesium are the major ions contributing to hardness, and hardness is generally expressed as calcium carbonate. Water with a hardness equivalent to 0-75 mg equivalent CaC03/L is considered "soft." | ||||
Objective/Criterion 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. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
77715 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Iron |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. The aquatic life criterion was not exceeded. Three of the samples exceed the California Maximum Contaminant Level (MCL). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the full range of seasonal and annual variability in streamflows and constituent concentrations expected in streams of the Lahontan Region. 3. Three of 10 samples exceeded the MCL 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. State Board Review and Conclusion: The April 19, 2010 State Water Board staff report for the 2010 Integrated Report recommended to place this water body on the 303(d) list for iron based on the State Water Board staff determination that the data were collected over a broad period of time to meet section 6.1.5.3 of the Listing Policy. At the June 15, 2010 State Water Board meeting for approval of the 2010 Integrated Report, the State Water Board directed staff to reevaluate the listing recommendation for this water body-pollutant combination. Based on this reevaluation, State Water Board staff recommended the listing recommendation be revised to not place this water body-pollutant combination on the 303(d) list because the data show that they may not be temporally respresentative because the exceedences occurred in wetter months. On August 4, 2010 the State Water Board approved the staff recommendation to not place this water body-pollutant combination on the 303(d) list. The final language for the recommendation is the same as written under the "Regional Board Conclusion" above. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7215 | ||||
Pollutant: | Iron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Dissolved iron concentrations in 10 samples ranged from 15 to 115 ug/L. The criterion was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The U.S. Environmental Protection Agency's national freshwater aquatic life criterion for iron is a 4-day average of 1000 ug/L. | ||||
Objective/Criterion Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 7216 | ||||
Pollutant: | Iron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005.
Total recoverable iron concentrations in 10 samples ranged from 80 to 400 ug/L. Three samples exceeded the California MCL. |
||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for iron is 300 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71822 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Lead |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the dissolved lead or total lead samples exceeds the applicable standard(s). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved lead samples exceeded the California Toxics Rule standards. None of 10 total lead samples exceeded the California Maximum Contaminant Level. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7217 | ||||
Pollutant: | Lead | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Dissolved lead concentrations in 9 of 10 samples were below the detection level. The remaining sample was an estimated value. The standards were not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for lead are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard ranges from 8.92 to 42.83 ug/L and the chronic toxicity standard ranges from 0.35 to 1.67 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7218 | ||||
Pollutant: | Lead | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Of 10 samples, 3 had concentrations of total lead below the detection level and one was an estimated value. Conentrations in the remaining samples ranged from 0.06 to 0.17 ug/L. The MCL was not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for lead is 15 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72500 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Magnesium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. There are no applicable California of federal water quality standards or criteria for magnesium. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. There are no applicable standards or criteria and the data cannot be assessed using 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7196 | ||||
Pollutant: | Magnesium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of total magnesium in 10 samples ranged from 1.45 to 8.2 mg/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for magnesium. It is generally monitored as a component of another water quality parameter such as hardness, Total Dissolved Solids, or Sodium Adsorption Ratio. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten quarterly samples were collected between August 2001 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7197 | ||||
Pollutant: | Magnesium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved magnesium in 10 samples ranged from 1.56 to 8.19 mg/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for magnesium. It is generally monitored as a component of another water quality parameter such as hardness, Total Dissolved Solids, or Sodium Adsorption Ratio. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten quarterly samples were collected between August 2000 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71519 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Molybdenum |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. There are no applicable standards or criteria for molybdenum. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. There are no applicable water quality standards or criteria and the data cannot be assessed using 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7224 | ||||
Pollutant: | Molybdenum | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of total molybdenum in 10 samples ranged from 2 to 2.6 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no applicable water quality standards or criteria for molybdenum for protection of the Municipal and Domestic Supply beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7223 | ||||
Pollutant: | Molybdenum | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved molybdenum in 10 samples ranged from 2 to 2.7 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal water quality standards or criteria for molybdenum for the protection of aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between August 2001 and July 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71176 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Nickel |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: 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. None of the samples exceeds the applicable California Toxics Rule standards or California Maximum Contaminant Level (MCL). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved nickel samples exceeded the California Toxics Rule standards. None of 10 total nickel samples exceeded the MCL. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7226 | ||||
Pollutant: | Nickel | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005.
Concentrations of total nickel in 2 of 10 samples were below the detection level. Concentrations in the remaining 8 samples ranged from 0.28 to 0.57 ug/L. The MCL was not violated. |
||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for nickel is 100 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Twin Lakes" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 7225 | ||||
Pollutant: | Nickel | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved nickel in 2 of 10 samples were below the detection level. The remaining samples had dissolved nickel concentrations ranging from 0.22 to 0.32 ug/L. The CTR standards were not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for nickel are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard ranges from 125.60 to 356.41 ug/L. The chronic toxicity standard ranges from 13.96 to 39.63 ug/L | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71947 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous assessment cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged and is as follows: This pollutant is being considered for placement on the 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. Three 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the diel, seasonal and annual variability expected in streamflows and dissolved oxygen concentrations in streams of the Lahontan Region. 3. Three of 9 samples exceeded the water quality 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7178 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. The dissolved oxygen concentrations in 9 samples ranged from 6.5 to 10.7 mg/L. Three samples were below the 8 mg/L minimum concentration. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The objective, from Lahontan Basin Plan Table 3-6, is a one- day minimum dissolved oxygen concentration of 8 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Nine samples were collected approximately quarterly between August 2001 and July 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71472 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Phosphate |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the annual average datapoints exceeds the site-specific 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of four annual average datapoints exceeded the site-specific 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 8850 | ||||
Pollutant: | Phosphate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Concentrations of PO4-P in 10 samples ranged from 0.019 to 0.066 mg/L. Calculated PO4 concentrations ranged from 0.058 to 0.202 mg/L. The objective was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The applicable site-specific objective (from Basin Plan Table 3-17) includes an annual average dissolved orthophosphate concentration of 0.27 mg/L and a 90th percentile value of 0.050 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples each (1 to 4 per year) were collected for PO4-P between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71714 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Phosphorus |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. No biological data are available for assessment whether any of the chemical samples exceeds 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 do not satisfy the data quality requirements of section 6.1.4 of the Policy due to an error in the SWAMP QAPP regarding holding times for total phosphorus samples.. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. No biological data are available for assessment of compliance with the objective for biostimulatory substances using 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
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LOE ID: | 8852 | ||||
Pollutant: | Phosphorus | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total phosphorus ranged from 0.035 to 0.101 mg/L. No biological data were available for assessment of compliance with the objective for biostimulatory substances. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There is no site-specific numeric objective for total phosphorus for Mammoth Creek. The Lahontan Basin Plan's narrative objective for biostimulatory substances states:
"Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect the water for beneficial uses." |
||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | Sampling and analysis were done according to the SWAMP QAPP. However, in July 2009 an error was discovered in the QAPP related to holding times for total phosphorus samples that affects the validity of data for the Lahontan Region The holding time for samples that are not acid-preserved.should be 48 hours rather than 28 days as indicated in the QAPP. "Low level" phosphorus analyses, without acid preservation, are used in the Lahontan Region's SWAMP program. . | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72327 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Sediment |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: The Lahontan Basin Plan's narrative water quality objective is an antidegradation based objective that provides that there shall be no increases in suspended sediment concentrations or loads. This pollutant is being considered for placement on the section 303(d) list under section 3.10 of the Listing Policy, which deals with trends in water quality. One line of evidence is available in the administrative record to assess this pollutant. It includes 10 suspended sediment concentration values and 8 suspended sediment load values calculated from instantaneous discharge measurements. Suspended sediment concentrations and loads are dependent on flows and can change rapidly over a short time during storm or snowmelt runoff events. Quarterly samples are insufficient to capture these short term events and therefore are insufficient to define natural background suspended sediment concentrations and loads, or to detect trends. Listing Policy Section 3.10 requires that natural background conditions be established. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. Sampling frequency was insufficient to establish natural background conditions and therefore does not meet the requirements of Listing Policy Section 3.10. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
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LOE ID: | 8869 | ||||
Pollutant: | Sediment | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey (USGS) sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. (No samples were collected in 2002.) Suspended sediment concentrations in 10 samples ranged from 2 to 16 mg/L. The USGS calculated sediment loads based on 8 instantaneous discharge flow measurements collected from 2003 to 2005. Flows ranged from 7.3 to 60 cubic feet per second. The associated loads ranged from 0.07 to 0.57 tons per day. The data were not sufficient to document baseline and trend conditions to assess compliance with the objective. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Lahontan Basin Plan's objective states: "The suspended sediment load and suspended sediment discharge rate of surface waters shall not be altered in such a manner as to cause nuisance or adversely affect the water for beneficial uses." | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected quarterly in 2001 and from 2003 to 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development¿ and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71833 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Selenium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. None of the samples exceeds the applicable water quality standard. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved selenium samples exceeded the California Toxics Rule standards. None of 10 total selenium samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
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LOE ID: | 7236 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Ten out of ten samples were below detection levels. The MCL was not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for selenium is 50 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 7235 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Concentrations of dissolved selenium in 10 samples were all below the detection levels. The California Toxics Rule standards were not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule selenium standards for the protection of freshwater aquatic life are as follows: 4 day average = 5.0 ug/L; 1 hour average = 20 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71834 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Silver |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. None of the samples exceeds the applicable water quality standard(s). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved silver samples exceeded the California Toxics Rule standards. None of 10 total silver samples exceeded the California Maximum Contaminant Level. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 7228 | ||||
Pollutant: | Silver | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005.
Concentrations of total silver in 10 samples were below the detection level. Per Listing Policy section 6.1.5.5, the MCL was not violated. |
||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for silver is 100 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7227 | ||||
Pollutant: | Silver | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved silver in 10 samples were below the detection level. Per Listing Policy Section 6.1.5.5, the CTR standards were not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule freshwater aquatic life standards for silver are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard (as an instantaneous maximum) ranges from 0.24 to 1.98 mg/L.: | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71370 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Specific Conductance |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: This pollutant is being considered for placement on the 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. None of the samples exceeds the California Maximum Contaminant Level (MCL). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 samples exceeded the MCL 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8838 | ||||
Pollutant: | Specific Conductance | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Ten field measurements of specific conductance ranged from 62 to 197 uS/cm. An additional two laboratory measurements taken in 2001 were 163 and 194 uS/cm. The MCL was not exceeded. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for specific conductance is 900 microsiemens per centimeter (uS/cm). | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten field measurements were taken approximately quarterly between August 2001 and July 2005. Two additional laboratory measurements were taken in August and November 2001. No measurements were taken in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71780 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Temperature, water |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: The Lahontan Basin Plan's narrative temperature objective is an antidegradation-based objective that requires that there be no change in temperature in waters designated for the Cold Freshwater Habitat (COLD) beneficial use. The objective does not include specific numerical limits for protection of the COLD use. Listing Policy Section 3.10 contains directions for assessment based on trends in water quality. These directions include requirements to establish specific baseline conditions and specify the influence of seasonal and interannual effects. One line of evidence is available to support this decision. There are not enough temperature samples to establish baseline conditions (including diel, seasonal, annual and interannual variations in temperature) or to detect declining trends in the temperature regime if such trends exist. Because temperature samples were collected only quarterly, weekly and monthly average data are not available for comparison with guidelines in the scientific literature for the temperature requirements of sensitive aquatic species such as salmonids, as directed in Listing Policy Section 6.1.5.9. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
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LOE ID: | 7175 | ||||
Pollutant: | Temperature, water | ||||
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: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) Water temperatures in 9 measurements ranged from 0 to18 degrees Celsius. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The applicable language from the Lahontan Basin Plan's temperature objective states: "The natural receiving water temperature of all waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such an alteration in temperature does not adversely affect the water for beneficial uses.
For waters designated WARM, water temperature shall not be altered by more than five degrees Fahrenheit (5o F) above or below the natural temperature. For waters designated COLD, the temperature shall not be altered." |
||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Nine temperature measurements were taken approximately quarterly between August 2001 and July 2005. No measurements were taken in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
70988 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Thallium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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 available in the administrative record to assess this pollutant. None of the samples for total thallium or dissolved thallium exceeds the applicable criteria or standard. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 dissolved thallium samples exceeded the freshwater aquatic life criteria. None of 10 total thallium samples exceeded the California Maximum Contaminant Level 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
|
|||||
LOE ID: | 7221 | ||||
Pollutant: | Thallium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005.
Concentrations of total recoverable thallium in 10 samples were below the detection level. Per Listing Policy section 6.1.5.5, the MCL was not violated. |
||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The U.S. Environmental Protection Agency's Lowest Observed Effect Levels (LOEL) criteria include an acute toxicity value of 1400 ug/L,and a chronic toxicity value of 40 ug/L. The criteria also include an "Other" limit of 20 ug/L based on 2600 hour exposure of one fish species.. | ||||
Objective/Criterion 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. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development¿and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7222 | ||||
Pollutant: | Thallium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005.
Concentrations of total recoverable thallium in 10 samples were below the detection level. Per Listing Policy section 6.1.5.5, the MCL was not violated. |
||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for thallium is 2 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71125 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Total Kjeldahl Nitrogen (TKN) |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. There are no biological data available for assessment whether of the chemical samples exceeds the water quality objective for biostimulatory substances. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. There are no biological data available for assessment of compliance with the objective for biostimulatory substances under 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8846 | ||||
Pollutant: | Total Kjeldahl Nitrogen (TKN) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program between 2001 and 2005. Concentrations of TKN in 10 samples ranged from 0.001 to 0.058 mg/L. No biological data are available for assessment of compliance with the water quality objective for biostimulatory substances. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There is no site-specific numeric objective for Total Kjeldahl Nitrogen (TKN) for Mammoth Creek. The Lahontan Basin Plan's narrative objective for biostimulatory substances states:
"Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect the water for beneficial uses." |
||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples (1 to 4 per year) were collected between 2001 and 2005. No samples were collected in 2002. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
78860 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff 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. The single sample exceeds 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 do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample exceeded the guideline and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 16 samples is needed for application of 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 32066 | ||||
Pollutant: | Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | One sample was collected to evaluate sediment toxicity. The sample did not exhibit significant toxicity. The toxicity test included survival and growth 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: | Statewide Project Urban Pyrethroid Status Monitoring | ||||
SWAMP Data: | 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 6 Basin Plan. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
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. | ||||
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 sample was collected at station 603SUP028. | ||||
Temporal Representation: | The sample was collected in October 2006. | ||||
Environmental Conditions: | |||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. | ||||
QAPP Information Reference(s): | Surface Water Ambient Monitoring Program Quality Assurance Program Plan | ||||
DECISION ID |
72387 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Vanadium |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. There are no applicable standards or criteria for dissolved vanadium. None of the total vanadium samples exceeds the applicable criterion. 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. Quarterly samples do not capture the seasonal and annual variability expected in streamflows and constituent concentrations in streams of the Lahontan Region. 3. None of 10 samples for total vanadium exceeded the California Notification Level criterion and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 7230 | ||||
Pollutant: | Vanadium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of total vanadium in 5 of 10 samples were below the detection level. The presence of vanadium in the remaining 5 samples was verified but not quantified. The criterion was not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Notification Level criterion for vanadium in drinking water is 50 ug/L. | ||||
Objective/Criterion Reference: | Drinking Water Notification and Response Levels: An Overview | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7229 | ||||
Pollutant: | Vanadium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. Concentrations of dissolved vanadium in 2 of 10 samples were below the detection level. Vanadium concentrations in the remaining 8 samples ranged from 0.3 to 0.9 ug/L. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | There are no California or federal standards or criteria for dissolved vanadium for the protection of freshwater aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72554 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | Zinc |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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. None of the samples exceeds the applicable water quality standard(s). 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 satisfy the data quality requirements of section 6.1.4 of the Policy. 2. The data used do not satisfy the data quantity requirements of section 6.1.5 of the Policy. 3. None of 10 dissolved zinc samples exceeded the California Toxics Rule standards. None of 10 total zinc samples exceeded the California Maximum Contaminant Level. 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 Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 7231 | ||||
Pollutant: | Zinc | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station under the Region 6 SWAMP program approximately quarterly between 2001 and 2005. One of 10 samples for dissolved zinc was below the detection level, and 2 were estimated values. Concentrations of dissolved zinc in the remaining samples ranged from 0.6 to 2.8 ug/L. The CTR standards were not violated.
Concentrations of dissolved zinc in 12 samples ranged from 0.8 to 3 ug/L Three samples were estimated values and two were below detection levels The standards were not violated.. |
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Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The California Toxics Rule (CTR) freshwater aquatic life standards for zinc are dependent on hardness. At the hardness levels reported for this station, the acute toxicity standard ranges from 31.37 to 89.16 ug/L, and the chronic toxicity standard ranges from 31.63 to 89.89 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 7232 | ||||
Pollutant: | Zinc | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. Of ten samples for total recoverable zinc, one was below the detection level and four were estimated values. Concentrations of total recoverable zinc in the remaining 4 samples ranged from 3 to 4 ug/L. The MCL was not violated. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's "Chemical Constituents" objective. The MCL for zinc is 5 mg/L, equivalent to 5000 ug/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Ten samples were collected approximately quarterly between 2001 and 2005. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
71942 |
Region 6 |
Mammoth Creek (Twin Lakes outlet to Old Mammoth Road) |
||
Pollutant: | pH |
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Staff Conclusion: | Regional Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous listing cycle. No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows: The Lahontan Basin Plan's narrative pH objective is an antidegradation-based objective that requires that there be no change greater than 0.5 pH units in waters designated for the Cold Freshwater Habitat (COLD) or Warm Freshwater Habitat beneficial uses. Listing Policy Section 3.10 contains directions for assessment based on trends in water quality. These directions include requirements to establish specific baseline conditions and specify the influence of seasonal and interannual effects. One line of evidence is available to support this decision. There are not enough pH samples to establish baseline conditions (including diel, seasonal, annual and interannual variations) or to detect changes in the pH regime due to controllable factors, if such trends exist. |
Regional Board Staff Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
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LOE ID: | 8839 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) | ||||
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled this station approximately quarterly under the Region 6 SWAMP program between 2001 and 2005. (No samples were collected in 2002.) The range of pH in 8 field measurements was 7.5 to 8.4 units. An additional two laboratory measurements were 8 and 7.8 units. There are insufficient data to document natural background conditions or to detect trends. | ||||
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The regionwide water quality objective for pH in the Lahontan Basin Plan states:
"In fresh waters with designated beneficial uses of COLD or WARM, changes in normal ambient pH levels shall not exceed 0.5 pH units. For all other waters of the region, the pH shall not be depressed below 6.5 nor raised above 8.5 units. The Regional Board recognizes that some waters of the Region may have natural pH levels outside of the 6.5 to 8.5 range. Compliance with the pH objective for these waters will be determined on a case-by-case basis." |
||||
Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | One station, "Mammoth Creek at Old Mammoth Road" was sampled. | ||||
Temporal Representation: | Eight field pH measurements were taken approximately quarterly between August 2001 and July 2005. No measurements were taken in 2002. An additional two laboratory measurements were taken in August and November 2001. | ||||
Environmental Conditions: | Mammoth Creek is a tributary of the Owens River with headwaters near the Sierra Nevada crest. The lower reach of Mammoth Creek is influenced by geothermal springs and is called Hot Creek. In addition to the Cold Freshwater Habitat beneficial use, Mammoth Creek is designated for the Spawning, Reproduction and Development and Migration of Aquatic Organisms beneficial uses. | ||||
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. | ||||
QAPP Information Reference(s): | |||||