# Draft 2008 California 303(d)/305(b) Integrated Report

# Supporting Information

## Regional Board 5 - Central Valley Region

Water Body Name: | Bear River (Amador Co, Lower Bear River Reservoir to Mokelumne River, N Fork)
Water Body ID: | CAR5326005020041209160741
Water Body Type: | River & Stream

DECISION ID | 4445
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)(2006)
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under sections 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. Based on section 3.2, numeric water quality objectives for pH are exceeded and the pollutant is likely to cause or contribute to the exceedance. Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The pollutant exceeds the water quality objective in the Basin Plan. 2. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 3. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 4. Nine of 77 water sample pH measurements exceeded (were lower than) the Basin Plan pH water quality objective, and these do not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 5. Nineteen of 165 water sample pH measurements exceeded (were lower than) the Basin Plan pH water quality objective, and these do not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 6. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4445

LOE ID: | 21655
Pollutant: | pH
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 165
Number of Exceedances: | 19
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Historical Water Quality Results for Analytical Laboratory Measurements 590 PG&E Company Mokelumne River Project (FERC 137, PG&E, 2003) collected 165 samples from March 2002 to July 2002. Nineteen out of 165 samples had pH values lower than 6.5 and thus did not meet the evaluation objective.
Data Reference: | Mokelumne River Project (FERC 137) and Mokelumne Watershed correspondence and reports
Water Quality Objective/Criterion: | The pH of water shall not be depressed below 6.5, raised above 8.5, or changed at any time more than 0.5 units from normal ambient pH.
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Samples were collected from Bear River, below the Bear Reservoir from 8 locations: 1) Leakage flow from the right abutment of the Lower Bear River Reservoir Dam collected at the weir, 2) Leakage flow from the right abutment of the Lower Bear River Res. Dam collected below the weir, below the spillway confluence, 3 Outflow from the instream flow release pipe below Lower Bear River Reservoir, 4) Leakage flow from left abutment below Lower Bear River Res. Dam collected at the weir, 5) Spill over Lower Bear River Res. during one sampling event only, 6) Bear River below Lower Bear River Reservoir, 7) Bear River above gaging station, 8)Bear River above Confluence with Rattlesnake Creek
Temporal Representation: | Sampling occurred from July 2000 to September 2004.
Environmental Conditions: |
QAPP Information: | Data quality: Good. Well documented QA/QC including report on Certified Analytical Reports and chain-of-custody documentation.
QAPP Information Reference(s):
LOE ID: | 2717
Pollutant: | pH
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 77
Number of Exceedances: | 9
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Nine out of 77 samples had a pH below 6.5. [Historical Water Quality Results for Analytical Laboratory Measurements PG&E Company Mokelumne River Project (FERC 137)]. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | "pH is not to be depressed below 6.5"- From the Central Valley Regional Water Quality Control Board's Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River below Lower Bear River Reservoir.
Temporal Representation: | Samples taken between 2000 and 2003.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including report on Certified Analytical Reports and chain-of-custody documentation.
QAPP Information Reference(s):

DECISION ID | 4444
Pollutant: | Copper
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)(2006)
Revision Status | Revised
Sources: | Resource Extraction
Expected TMDL Completion Date: | 2021
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Fifty-two 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 in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Fifty-two of 60 samples exceed the California Toxics Rule 4-day average criteria for dissolved Copper and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. LOE #27976 contains the revised assessment of the data from the 2006 listing. LOE # 2716 (used for the 2006 decision) contained J-flagged data and was not associated with this listing decision. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff 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.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4444

LOE ID: | 27977
Pollutant: | Copper
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 12
Number of Exceedances: | 11
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Eleven of 12 samples exceeded the California Toxics Rule 4-day average criteria for dissolved Copper. Data was collected for the Monitoring Summary for Lower Bear River Reservoir Dam Surface Water and Runoff.
Data Reference: | Mokelumne River Project (FERC 137) and Mokelumne Watershed correspondence and reports
Water Quality Objective/Criterion: | California Toxics Rule 4-day average criteria for dissolved Copper.
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: | Samples were collected at Bear River below Lower Bear River Reservoir.
Temporal Representation: | Samples were collected from August 2006 - May 2007.
Environmental Conditions: |
QAPP Information: | CH2M Hill. 2007. Monitoring Summary for Lower Bear River Reservoir Dam Surface Water and Runoff. October 2007.
QAPP Information Reference(s):
LOE ID: | 28189
Pollutant: | Copper
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 18
Number of Exceedances: | 13
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Thirteen of 18 samples exceeded the California Toxics Rule 4-day average criteria for dissolved Copper. Data was collected for the Mokelumne River Annual Water Quality Monitoring Results for Dissolved Copper.
Data Reference: | Mokelumne River Project (FERC 137) and Mokelumne Watershed correspondence and reports
Water Quality Objective/Criterion: | California Toxics Rule 4-day average criteria for dissolved Copper.
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: | Samples were collected at Bear River below Lower Bear River Reservoir (BR1).
Temporal Representation: | Samples were collected from March 2005 through September 2008.
Environmental Conditions: |
QAPP Information: | PG&E. Mokelumne River Project, FERC Project No. 137, Water Quality Monitoring Program Report.
QAPP Information Reference(s):
LOE ID: | 27976
Pollutant: | Copper
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 30
Number of Exceedances: | 28
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Twenty-eight of 30 samples exceeded the California Toxics Rule 4-day average criteria for dissolved Copper. Data was collected for the Mokelumne River Annual Water Quality Monitoring Results for Dissolved Copper.
Data Reference: | Mokelumne River Project (FERC 137) and Mokelumne Watershed correspondence and reports
Water Quality Objective/Criterion: | California Toxics Rule 4-day average criteria for dissolved Copper.
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: | Samples were collected at Bear River below Lower Bear River Reservoir (BR1), Bear River above guaging station (BR2), Bear River above Confluence with Rattlesnake Creek (BR-RSC1), and Bear River below Confluence with Rattlesnake Creek (BR-RSC2).
Temporal Representation: | Samples were collected from February 2003 through September 2003.
Environmental Conditions: |
QAPP Information: | PG&E. Mokelumne River Project, FERC Project No. 137, Water Quality Monitoring Program Report.
QAPP Information Reference(s):

DECISION ID | 4458
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)(2006)
Revision Status | Original
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under sections 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Sixteen lines of evidence are available in the administrative record to assess this pollutant. Based on section 3.2, numeric water quality objectives for dissolved oxygen are not exceeded and the pollutant is not likely to cause or contribute to the exceedance. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification in favor of placing this water segment-pollutant combination the toxic 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. Four of 80 samples exceeded the Basin Plan water quality objective for dissolved oxygen, and these do 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.
RWQCB Board Decision / Staff Recommendation: | This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4458

LOE ID: | 2726
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 7
Number of Exceedances: | 1
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | One out of 7 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Leakage flow from the right abutment of the Lower Bear River Res. Dam collected below the weir, below the spillway confluence. Latitude (38° 32.23 N); Longitude (120° 15.44 W).
Temporal Representation: | Samples taken monthly from 5/15/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2727
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 7
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 7 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Outflow from the instream flow release pipe below Lower Bear River Res. upstream of station BR1. Latitude (38° 32.21 N); Longitude (120° 15.40 W).
Temporal Representation: | Samples taken monthly from 5/15/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2728
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 7
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 7 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Leakage flow from left abutment below Lower Bear River Res. Dam collected at the weir. Latitude (38° 32.26 N); Longitude (120° 15.41 W).
Temporal Representation: | Samples taken monthly from 6/11/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2729
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 7
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 7 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boar's Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Leakage flow from left abutment below Lower Bear River Res. Dam collected below the weir. Latitude (38° 32.23 N); Longitude (120° 15.42W).
Temporal Representation: | Samples taken monthly from 6/11/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2730
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
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: | Zero out of 1 sample had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Spill over Lower Bear River Res. during one sampling event only. Latitude (38° 32.26 N); Longitude (120° 15.44 W).
Temporal Representation: | Samples taken on 6/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2731
Pollutant: | Oxygen, Dissolved
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 5 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River above gaging station. Latitude (38° 29.604N); Longitude (120° 17.304 W).
Temporal Representation: | Samples taken monthly from 8/29/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2721
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
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: | Zero out of 1 sample had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Unnamed tributary on the upper west shore of Lower Bear River Reservoir (due to snowmelt). Latitude (38° 33.23 N); Longitude (120° 13.30 W).
Temporal Representation: | Sample taken 3/27/2002
Environmental Conditions: | Sample could not be taken on 4/23/2002 due to tributary being 'DRY'.
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2718
Pollutant: | Oxygen, Dissolved
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 10 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River below Lower Bear River Reservoir. Latitude (38º 32.14 N); Longitude (120º 15.48W).
Temporal Representation: | Samples taken monthly from 3/27/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2733
Pollutant: | Oxygen, Dissolved
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 5 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River below Confluence with Rattlesnake Creek. Latitude (38° 31.035 N); Longitude (120° 16.105 W).
Temporal Representation: | Samples taken monthly from 8/29/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2732
Pollutant: | Oxygen, Dissolved
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | None of the 5 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan)
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River above Confluence with Rattlesnake Creek Latitude (38° 31.145 N) Longitude (120° 16.008 W)
Temporal Representation: | Samples taken monthly 8/29/2002 to 12/11/2002
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2720
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 3
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 3 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Unnamed tributary entering midway up the west shore of Upper Bear River Reservoir. Latitude (38° 33.90 N); Longitude (120° 13.23 W).
Temporal Representation: | Samples taken monthly from 4/23/2002 to 6/11/2002.
Environmental Conditions: | No sample was taken in July 2002 due to the tributary being 'DRY'.
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2725
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 7
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 7 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Leakage flow from the right abutment of the Lower Bear River Res. Dam collected at the weir. Latitude (38° 32.30 N); Longitude (120° 15.48 W).
Temporal Representation: | Samples taken monthly from 6/11/2002 to 12/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2722
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
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: | Zero out of 1 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Unnamed tributary on the upper west shore of Lower Bear River Reservoir (due to snowmelt). Latitude (38° 33.21 N); Longitude (120° 13.32 W).
Temporal Representation: | Sample taken 3/27/2002.
Environmental Conditions: | No sample could be taken 4/23/2002 due to the tributary being 'DRY'.
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2723
Pollutant: | Oxygen, Dissolved
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Dissolved
Beneficial Use: | Cold Freshwater Habitat
Number of Samples: | 5
Number of Exceedances: | 2
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Two out of 5 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Board's Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Upper Bear River Reservoir outflow to Lower Bear River Reservoir. Latitude (38° 33.44 N); Longitude (120° 12.89 W).
Temporal Representation: | Samples taken monthly from 3/27/2002 to 7/17/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2724
Pollutant: | Oxygen, Dissolved
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Zero out of 4 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD)-From the Central Valley Regional Water Quality Control Boards Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Little Bear River on the northwest shore of Lower Bear River Reservoir. Latitude (38° 33.57 N); Longitude (120° 14.86 W).
Temporal Representation: | Samples taken monthly from 3/27/2002 to 6/11/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):
LOE ID: | 2719
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: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | One out of 5 samples had a DO concentration below 7.0 mg/L. (PG&E, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Dissolved Oxygen (DO) concentrations shall not be reduced below 7.0 mg/L (for waters designated as COLD) - From the Central Valley Regional Water Quality Control Board's Water Quality Control Plan (Basin Plan).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Bear River above Upper Bear River Res., below its confluence with Tragedy Creek. Latitude (38° 34.40 N) ; Longitude (120° 12.56W).
Temporal Representation: | Samples taken monthly from 3/27/2002 to 7/17/2002.
Environmental Conditions: |
QAPP Information: | Well documented QA/QC including 174 page report on Certified Analytical Reports and Chain-of-Custody Documentation.
QAPP Information Reference(s):