| Study ID | AJOH0065 |
| Study Name | Analyzing Chlorinated Pesticide Residues in Fish from Washington Background Lakes and Emerging PBTs in Fish Tissue |
| EIM Data Entry Review Status | Reviewed |
| Study Type | General environmental study |
| Study Purpose | Chlorinated pesticides will be characterized in edible tissues of fish from background lakes in Washington. The data are needed to 1) prioritize waterbodies currently listed as water quality limited for fish consumption due to pesticides, and 2) determine the potential for new waterbody listings for these chemicals if Ecology adopts human health criteria based on higher fish consumption rates. Ecology will collect fish from 24 lakes in four regions statewide during the summer and fall of 2011. Approximately 50 composite fillet samples will be analyzed for 29 chlorinated pesticides or breakdown products using low-level methods. The following legacy insecticides are of primary interest: DDT, dieldrin, chlordane, heptachlor, hexachlorobenzene, aldrin, alpha BHC, and toxaphene.
In addition, a screening survey was conducted to assess the occurrence of PBTs that have either not previously been analyzed in local fish populations or are a focus of Chemical Action Plans to reduce or eliminate toxic threats. The following chemicals were analyzed in common carp and largescale suckers collected from Lake Washington, the Columbia and Yakima Rivers, and Lake Spokane: hexabromocyclododecane, tetrabromobisphenol A, chlorinated paraffins, polybrominated diphenyl ethers, polychlorinated naphthalenes, perfluorinated organic compounds, lead, and cadmium. |
| Field Collection Date Range | 9/22/2009 - 2/14/2012 |
| Data First/Last Loaded Date |  |
| Data Last Updated Date | |
| Ecology Program or Other Responsible Entity | Ecy Environmental Assessment Program |
| Ecology Contact | Art Johnson |
| Ecology Monitoring Program | |
| Submitting Organization | |
| Study QA Planning Level | LEVEL 4: Approved QAPP or SAP. |
| Study QA Project Plan Description | Ecology will collect fish from 24 lakes in four regions statewide during the summer and fall of 2011. Approximately 50 composite fillet samples will be analyzed for 29 chlorinated pesticides or breakdown products using low-level methods. The following legacy insecticides are of primary interest: DDT, dieldrin, chlordane, heptachlor, hexachlorobenzene, aldrin, alpha BHC, and toxaphene. The QAPP for Emerging Chemicals was an addendum (https://fortress.wa.gov/ecy/publications/publications/1103108addendum1.pdf ) to the Chlorinated Pesticide Background QAPP (https://fortress.wa.gov/ecy/publications/publications/1103108.pdf. |
| Study QA Assessment Level | Level 5: Data Verified and Assessed for Usability in a Peer-Reviewed Study Report |
| Study Result Description | Legacy chlorinated pesticides and breakdown products were analyzed in 48 fish fillet samples collected from 28 background lakes across Washington State. The data were collected to help prioritize 303(d)-listed waterbodies for water cleanup plans and support revisions to the water quality standards for chlorinated pesticides.
The most frequently detected compounds (80% or more of samples) included 4,4’ isomers of DDT and its breakdown products DDE and DDD, dieldrin, chlordane components, hexachlorobenzene, and mirex. 4,4’-DDE occurred in the highest concentrations and increased moving from western to eastern Washington, a pattern not seen for any of the other pesticides. A number of the lakes sampled in the background study could qualify for 303(d) listing if higher fish consumption rates were adopted in the water quality standards.
HBCDD, PCNs, PBDEs, PFCs, CPs, and Pb were detected in all or in most samples. Concentration levels were approximately 100 - 1,000 ng/Kg for HBCDD and PCNs, 2,000 - 100,000 ng/Kg for PBDEs and PFCs, and 300,000 - 1,500,000 ng/Kg for CPs (parts per trillion, wet weight). Pb detections were at 0.10 - 0.50 mg/Kg (parts per million). TBBPA and Cd were not detected in any samples at or above 500 - 900 ng/Kg and 0.10 mg/Kg, respectively. As far as could be determined, this study marks the first time the presence of HBCDD, PCNs, and CPs have been reported in Pacific Northwest freshwater fish. |
| Study Comment | This study contains data from two reports: An Assessment of the Chlorinated Pesticide Background in Washington State Freshwater Fish and Implications for 303(d) Listings as well as PBTs Analyzed in Bottom Fish from Four Washington Rivers and Lakes:
Hexabromocyclododecane,
Tetrabromobisphenol A,
Chlorinated Paraffins,
Polybrominated Diphenylethers, Polychlorinated Naphthalenes, Perfluorinated Organic Compounds, Lead, and Cadmium. |
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