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

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name: Bodie Creek
Water Body ID: CAR6302003119980803161248
Water Body Type: River & Stream
 
DECISION ID
5341
 
Pollutant: Mercury
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Original
Sources: Source Unknown
Expected TMDL Completion Date: 2019
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 and 3.5 of the Listing Policy. Two lines of evidence are available in the administrative record to assess this pollutant.

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. Two of the 2 tissue samples exceeded the OEHHA Screening Value, and 3 out of 7 water samples exceeded the CTR criteria for total mercury and this exceeds the allowable frequency of table 3.1 or the Listing Policy. This listing replaces the previous 'metals' listing for this water body.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are 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 5341
 
LOE ID: 2853
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Sediment
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 Lahontan cutthroat trout were collected. Trout were collected in 1992 and 2002. Both samples exceeded the guideline (TSMP, 2002).
Data Reference: Placeholder reference 2006 303(d)
 
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: Placeholder reference 2006 303(d)
 
Evaluation Guideline: OEHHA Screening Value 0.3 μg/g (Brodberg & Pollock, 1999).
Guideline Reference: Placeholder reference 2006 303(d)
 
Spatial Representation: One station located 1/4 mile upstream of road crossing at Flying M hunting club.
Temporal Representation: Samples were collected in 1992 and 2002.
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, 2001-2002. Department of Fish and Game.
QAPP Information Reference(s):
 
LOE ID: 2854
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 7
Number of Exceedances: 3
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Seven samples with 3 exceeding the criteria for total mercury (LRWQCB, 2004d).
Data Reference: Placeholder reference 2006 303(d)
 
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.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline: CTR value for total mercury is 0.50 ppb (50 ng/L).
Guideline Reference: Placeholder reference 2006 303(d)
 
Spatial Representation: Four sampling sites in Bodie Creek. BC-1: Headwaters, upstream of major mining impacts; BC-2: In Bodie State Park area, where creak flows through remnant tailings piles; BC-3: Upstream of Taylor Gulch, near former Syndicate mill site; BC-4 Upstream of Flying M Club, near fish tissue sampling site (TSMP).
Temporal Representation: April through June, 2004
Environmental Conditions:
QAPP Information: Bodie Creek Sampling and Analysis Plan, Lahontan RWQCB, April 2004.
QAPP Information Reference(s):