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

# Supporting Information

## Regional Board 5 - Central Valley Region

Water Body Name: | Bear River, Upper (from Combie Lake to Camp Far West Reservoir, Nevada and Placer Counties)
Water Body ID: | CAR5163301020011128161810
Water Body Type: | River & Stream

DECISION ID | 4574
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)(2006)
Revision Status | Original
Sources: | Resource Extraction
Expected TMDL Completion Date: | 2015
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for removal from the section 303(d) list under sections 4.1 and 4.5 of the Listing Policy. Under section 4.1, a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess pollutant. 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. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of 28 samples exceed the mercury Evaluation Guideline for the narrative toxicity objective. In accordance with section 4.1 and Table 4.1 of the Listing Policy, for a sample size of 28, delisting can occur only if there are 2, or fewer, exceedances. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation: | No new data were assessed for 2008. The decision has not changed.
SWRCB 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.
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4574

LOE ID: | 2599
Pollutant: | Mercury
LOE Subgroup: | Subgroup Missing
Matrix: | Water
Fraction: | Total
Beneficial Use: | Municipal & Domestic Supply
Number of Samples: | 25
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | None of the 25 samples from Bear Creek exceeded the Drinking Water MCL value (USGS, 2005).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Drinking Water MCL Title 22 Primary (0.002 mg/L).
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Twenty-five samples were taken at each of the following locations on the Bear River: below Rollins Reservoir; below Wolf Creek; below Steep Hollow Creek.
Temporal Representation: | Samples were taken monthly beginning in August 2000 at Wolf Creek; in July 2001 below Rollins Reservoir and below Steep Hollow Creek and ending June 2003.
Environmental Conditions: |
QAPP Information: | Data from USGS reports are considered of adequate quality per section 6.1.4 of the Policy.
QAPP Information Reference(s):
LOE ID: | 2601
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: | 3
Data and Information Type: | Fish tissue analysis
Data Used to Assess Water Quality: | Three fish were collected. Tissue concentrations ranged from 0.38 to 0.40 ppm. All exceeded the objective (SWRCB, 2003).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: | OEHHA guideline used (0.3 mg/kg) (Brodberg and Pollock, 1999).
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | All the fish were collected at Dog Bar Road.
Temporal Representation: | All fish were collected on September 23, 1999.
Environmental Conditions: |
QAPP Information: | All samples were collected using USGS methods and quality control.
QAPP Information Reference(s):