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

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name: Donner Lake
Water Body ID: CAL6352002119980806104900
Water Body Type: Lake & Reservoir
 
DECISION ID
6488
 
Pollutant: Priority Organics
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)(2006)
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: 303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Board will update this decision when new data and information become available and are assessed. Delisting cannot be justified at this time.

The original listing for "Priority Organics" was for violation of Office of Environmental Health Hazard Assessment (OEHHA) MTRL fish tissue criteria for PCBs and chlordane. The MTRLs were updated prior to the 2002 assessment cycle, and only the MTRL for PCBs was being violated at the time. For 2006, State Water Board staff prepared a line of evidence assessing the PCB data against OEHHA's Screening Value criterion. Two out of two samples violated that criterion.

Region 6 sponsored additional tissue sampling from Donner Lake, and the data from that study, along with the data used in the original listing, are now undergoing quality assurance/quality control checks, The final data from this study will be used in the next assessment cycle and may result in replacement of the "Priority Organics" listing with more specific listings for individual chemicals.
 
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 removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 6488
 
LOE ID: 4603
 
Pollutant: Priority Organics
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Not Recorded
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
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)
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
LOE ID: 753
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 2
Number of Exceedances: 2
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Two out of 2 samples exceeded. Two filet composite samples of lake trout were collected. Lake trout were collected in 1993 and 1996. The guideline was exceeded in both samples (TSMP, 2002).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Basin Plan: There shall be no detectable increase in bioaccumulation of pesticides in aquatic life.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline: OEHHA Screening Value is 20 ng/g for total PCBs (Brodberg & Pollock, 1999).
Guideline Reference: Placeholder reference 2006 303(d)
 
Spatial Representation: One station located about 1 mile west of the dam.
Temporal Representation: Samples were collected 9/16/93 and 9/18/96.
Environmental Conditions:
QAPP Information: Toxic Substances Monitoring Program 1992-93 Data Report.
Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 1996-2000. Department of Fish and Game.
QAPP Information Reference(s):