Water Body Name: | Rock Creek (tributary to Owens River) |
Water Body ID: | CAR6032014020070824170608 |
Water Body Type: | River & Stream |
Lines of Evidence (LOEs) for Decision ID 7813 |
LOE ID: | 5635 |
Pollutant: | Chloride |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 15 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Of 15 chloride samples, 3 were estimates or below detection levels. Chloride concentrations in the remaining 12 samples ranged from 0.32 to 0.6 mg/L. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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 chloride is 250 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fifteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
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LOE ID: | 5631 |
Pollutant: | Chloride |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Of 15 chloride samples, 3 were estimates or below detection levels. Chloride concentrations in the remaining 12 samples ranged from 0.32 to 0.6 mg/L. The annual average objective was not exceeded during the five years of sampling. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The site-specific objective, in Lahontan Basin Plan Table 3-17, includes an annual average of 1.2 mg/L and a 90th percentile value of 2.0 mg/L |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fifteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10457 |
LOE ID: | 21416 |
Pollutant: | Dissolved oxygen saturation |
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 Rock Creek under the Region 6 SWAMP program between 2004 and 2005. In four quarterly samples, percent saturation of dissolved oxygen ranged from 91 to 102 percent. The objective was not violated. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Four quarterly samples were collected between October 2004 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 7694 |
LOE ID: | 5706 |
Pollutant: | Fecal Coliform |
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: | Water column surveys (e.g. fecal coliform) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled fecal coliform bacteria quarterly at Rock Creek under the Region 6 SWAMP program between July 2004 and August 2005. Bacteria counts in four of five samples were estimated values, and the fifth sample was below the detection level. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Five quarterly samples were collected between July 2004 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
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LOE ID: | 5707 |
Pollutant: | Fecal Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 5 |
Number of Exceedances: | 0 |
Data and Information Type: | Water column surveys (e.g. fecal coliform) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled fecal coliform bacteria quarterly at Rock Creek under the Region 6 SWAMP program between July 2004 and August 2005. Bacteria counts in four of five samples were estimated values, and the fifth sample was below the detection level. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Five quarterly samples were collected between July 2004 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10458 |
LOE ID: | 21429 |
Pollutant: | Nitrate |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Sixteen samples each were collected for nitrite and nitrite plus nitrate. Due to large numbers of below detection level values, numerical nitrate concentrations could be calculated only for samples taken between October 2003 and August 2005. Concentrations of nitrate as N in 8 quarterly samples ranged from 0.002 to 0.039 mg/L. Annual average concentrations of nitrate as nitrate were estimates or below detection level for 2001, 2002 and 2003. The averages for 2004 and 2005 were 0.050 and 0.120 mg/L as nitrate. The objective was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The site-specific objective for nitrate (as nitrate) in Rock Creek, from Lahontan Basin Plan Table 3-17, includes an annual average of 0.3 mg/L and a 90th percentile value of 0.5 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples each for nitrite and nitrite plus nitrate were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
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LOE ID: | 21434 |
Pollutant: | Nitrate |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 16 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Sixteen quarterly samples each were collected for nitrite and nitrite plus nitrate. Due to large numbers of below deteciton level values, numerical nitrate concentrations could not be calculated for 8 of 16 samples. Concentrations of nitrate as N in the remaining 8 samples ranged from 0.002 to 0.039 mg/L. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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 expressed "as nitrate", equivalent to 10 mg/L expressed "as N." |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples each for nitrite and nitrite plus nitrate were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10424 |
LOE ID: | 21414 |
Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 16 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Seven of 16 quarterly samples for nitrite plus nitrate were below the detection level. Concentrations of nitrite plus nitrate in the remaining samples ranged from 0.001 to 0.039 mg/L. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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.. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10425 |
LOE ID: | 21413 |
Pollutant: | Nitrite |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 16 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Eight of 16 quarterly samples for nitrite were below the detection level. All of the 8 remaining samples had nitrite concentrations of 0.001 mg/L. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10463 |
LOE ID: | 21415 |
Pollutant: | Oxygen, Dissolved |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 15 |
Number of Exceedances: | 1 |
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Concentrations of dissolved oxygen in 15 quarterly samples ranged from 7.8 to 8.2 mg/L. One sample (at 7.8 mg/L) was below the minimum concentration in the objective. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The objective (from Lahontan Basin Plan Table 3-6) is a 1-day minimum dissolved oxygen concentration of 8 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fifteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 16118 |
LOE ID: | 5637 |
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 Rock Creek under the Region 6 SWAMP program between 2002 and 2005. Fourteen samples were collected for PO4 as P. Six of these samples were below the detection level; the remainder ranged from 0.001 to 0.006 mg/L. Calculated total orthophosphate values for 8 samples collected between 2003 and 2005 ranged from 0.003 to 0.018 mg/L. Annual averages could not be computed for 2002 and 2003 due to the below detection level values. The annual averages for 2003 to 2004, based on 4 and 3 samples per year, were 0.0045 and 0.005 mg/L. The objective was not exceeded.
One additional sample collected in November 2001 was analyzed for hydrolyzable phosphorus and phosphate; the result was below the detection level. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The site-specific objective, in Lahontan Basin Plan Table 3-17, for dissolved orthophosphate includes an annual average of 0.01 mg/L and a 90th percentile value of 0.01 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fourteen quarterly samples for PO4 as P were collected between 2002 and 2005. Eight calculations were done for orthophosphate. One sample for hydrolyzable phosphorus plus phosphate was taken on November 27, 2001. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10467 |
LOE ID: | 21419 |
Pollutant: | Phosphorus |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 12 |
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 Rock Creek under the Region 6 SWAMP program between 2002 and 2005. Concentrations of total phosphorus in 12 quarterly samples ranged from 0.004 to 0.016 mg/L. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The Lahontan Basin Plan does not include a site-specific objective (SSO) for total phosphorus in Rock Creek. The 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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Twelve quarterly samples were collected between 2002 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 16121 |
LOE ID: | 21420 |
Pollutant: | Sediment |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 15 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Suspended sediment concentrations in 15 quarterly samples ranged from below the detection level (in one sample) to 6 mg/L. Concurrent flow (instantaneous discharge) measurements ranged from 6.2 to 50 cubic feet per second. Suspended sediment loads were calculated for 9 samples collected between 2003 and 2005; loads ranged from below the detection level to 0.45 tons per day. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The Lahontan Basin Plan's narrative 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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fifteen quarterly samples were collected between 2001 and 2005. Nine load calculations were done. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 7695 |
LOE ID: | 5643 |
Pollutant: | Specific Conductance |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 16 |
Number of Exceedances: | 0 |
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Specific conductance in 16 field measurements ranged from 21 to 55 uS/cm. One laboratory measurement was taken for a sample collected in July 2003; it had a specific conductance of 10 uS/cm. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly field measurements of specific conductance were taken between 2001 and 2005. One laboratory measurement was taken for a sample collected in July 2003. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 7696 |
LOE ID: | 5650 |
Pollutant: | Temperature, water |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 16 |
Number of Exceedances: | 0 |
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Sixteen water temperature measurements ranged from 0 to 16 degrees Celsius. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The relevant 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 fo 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 ... above or below the natural temperature. For waters designated COLD, the temperature shall not be altered. Temperature objectives for COLD interstate waters and WARM interstate waters are as specified in the Water Quality Control Plan for Control of Temperature in The Coastal and Interstate Waters and Encosed Bays and Estuaries of California including any revisions." |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen measurements of water temperature were taken approximately quarterly between 2001 and 2005. . |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10426 |
LOE ID: | 5645 |
Pollutant: | Total Dissolved Solids |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total Dissolved |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 5 |
Number of Exceedances: | 5 |
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Concentrations of TDS in 16 quarterly samples (2 to 4 samples per year) ranged from 18 to 47 mg/L. The annual average objective was exceeded in 5 of 5 years. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The site-specific objective for Total Dissolved Solids (TDS) in Lahontan Basin Plan Table 3-17, includes an annual average of 21 mg/L and a 90th percentile value of 23 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples (2 to 4 per year) were collected between 2001 and 2005.. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
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LOE ID: | 5648 |
Pollutant: | Total Dissolved Solids |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total Dissolved |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 16 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. TDS concentrations in 16 samples ranged from 18 to 47 mg/L. The MCL was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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 Total Dissolved Solids (TDS) is 500 mg/L. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10466 |
LOE ID: | 21417 |
Pollutant: | Total Kjeldahl Nitrogen (TKN) |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 16 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Concentrations of total Kjeldahl nitrogen in 3 of 16 quarterly samples were estimated values. Concentrations in the remaining samples ranged from 0.06 to 0.18 mg/L. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The Lahontan Basin Plan does not include a site-specific objective (SSO) for total Kjeldahl nitrogen (TKN) in Rock Creek. The 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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Sixteen quarterly samples were collected between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 16119 |
LOE ID: | 21418 |
Pollutant: | Total Nitrogen as N |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 3 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. Total nitrogen was calculated from its constituents for 8 quarterly samples collected between October 2003 and August 2005.
Concentrations of total nitrogen ranged from 0.088 to 0.168 mg/L. The annual average objective was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The site-specific objective, in Lahontan Basin Plan Table 3-17, includes an annual average of 0.4 mg/L and a 90th percentile value of 0.7 mg/L |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Total nitrogen was calculated for 8 samples from constituents sampled quarterly between October 2003 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10472 |
LOE ID: | 5653 |
Pollutant: | Turbidity |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
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 Rock Creek under the Region 6 SWAMP program between October 2004 and August 2005. Four quarterly turbidity measurements expressed as NTRU were all below the detection level. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Four quarterly turbidity measurements expressed as NTRU were taken between October 2004 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
| |
LOE ID: | 21424 |
Pollutant: | Turbidity |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 4 |
Number of Exceedances: | 1 |
Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
Data Used to Assess Water Quality: | The U.S. Geological Survey sampled Rock Creek under the Region 6 SWAMP program between October 2003 and July 2004. Three of four quarterly turbidity measurements were below the detection level ; the remaining value was 5.2 NTU, slightly above the MCL. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Four quarterly turbidity measurements expressed as NTU were taken between October 2003 and July 2004. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
| |
LOE ID: | 21423 |
Pollutant: | Turbidity |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
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 Rock Creek under the Region 6 SWAMP program between October 2003 and July 2004. Three of four turbidity measurements expressed as NTU were below the detection level; the fourth was 5.2 NTU. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Four quarterly turbidity measurements expressed as NTU were taken between October 2003 and July 2004. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): | |
| |
LOE ID: | 5656 |
Pollutant: | Turbidity |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
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 Rock Creek under the Region 6 SWAMP program between October 2004 and August 2005. Four turbidity measurements expressed as NTRU were all below the detection level. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
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. There are no human health standards or criteria for turbidity expressed as NTRU. |
Objective/Criterion Reference: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Four quarterly turbidity measurements expressed as NTRU were taken between October 2004 and August 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 16120 |
LOE ID: | 5636 |
Pollutant: | pH |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 15 |
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 Rock Creek under the Region 6 SWAMP program between 2001 and 2005. The pH values in 15 field measurements ranged from 7 to 8 units. The objective was not exceeded. |
Data Reference: | 2007. SWAMP Data for the Owens Hydrologic Unit |
Water Quality Objective/Criterion: | The Lahontan Basin Plan's regionwide objective for pH 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: | 2007. Water Quality Control Plan for the Lahontan Region (as amended). |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | One station, Rock Creek above Diversion, was sampled. |
Temporal Representation: | Fifteen quarterly pH measurements were taken between 2001 and 2005. |
Environmental Conditions: | Rock Creek is a tributary of the Owens River, originating near the Sierra Nevada crest. Water from the lower reach of the creek is diverted into the Los Angeles Aqueduct. In addition to the Cold Freshwater Habitat beneficial use, Rock Creek is designated for the Spawning, Reproduction and Development use. |
QAPP Information: | The data meet the quality assurance requirements of the SWAMP QAPP. |
QAPP Information Reference(s): |