| |
DECISION ID |
6858 |
| |
| Pollutant: |
Selenium |
| Final Listing Decision: |
Decision in Progress |
| 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 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. A sufficient number of samples exceed the 2 ėg/g OEHHA tissue screening value guideline for Selenium. Under section 3.5 of the Listing Policy any water body segment where tissue pollutant levels in organisms exceed a pollutant specific evaluation guideline shall be placed on the section 303(d) list.
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. Three of 5 samples exceeded the OEHHA tissue-screening value of Selenium and this exceeds the allowable frequency listed in Table 3.1 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: |
|
| |
| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB 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. |
| |
| USEPA Decision: |
|
| |
| |
| |
| LOE ID: |
2968 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Tissue |
| Matrix: |
Tissue |
| Fraction: |
Total |
| |
| Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
| |
| Number of Samples: |
5 |
| Number of Exceedances: |
3 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Asses Water Quality: |
Three out of 5 samples exceeded (TSMP, 2002). A total of 5 filet samples of largemouth bass were collected. Bass were collected in 1992, 1999, and 2001-02. Bass exceeded the guideline in 1999 and 2001-02. |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
Colorado River Basin RWQCB Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
OEHHA Screening Value 2 ug/g. |
| Guideline Reference: |
Placeholder reference 2006 303(d) |
| |
| Spatial Representation: |
Two stations were sampled: about 2 miles downstream of the Needles Marina Resort and from Squaw Lake boat launch ramp to 1/4 mile north of Senator Lake. |
| Temporal Representation: |
Samples were collected annually in 1992, 1999 and 2001-02. |
| 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.
Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game. |
| QAPP Information Reference(s): |