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SCIENCE SUPPORT FOR EVALUATING NATURAL RECOVERY OF POLYCHLORINATED BIPHENYL CONCENTRATIONS IN FISH FROM CRAB ORCHARD LAKE, CRAB ORCHARD NATIONAL WILDLIFE REFUGE, ILLINOIS
Kunz, B.K., J.E. Hinck, R.D. Calfee, G.L. Linder, and E.E. Little.
U.S. Geological Survey Open-File Report 2018-1006, 30 pp, 2018

PCB contamination at Crab Orchard National Wildlife Refuge was identified in the 1970s, and a PCB-based fish-consumption advisory has been in effect since 1988 for Crab Orchard Lake. Some of the most contaminated areas of the refuge were actively remediated, and natural ecosystem recovery processes are expected to provide for further reduction of residual PCB concentrations in the lake. To understand environmental drivers of recent (2017) PCB residues in fish tissue and patterns in PCB residues through time, a project is planned in two phases. Task 1, reported here, includes a review of existing literature and a brief overview of environmental and biochemical/ physiological processes that drive PCB residues in fish tissue. The review includes a brief, scientifically based explanation of approaches used to establish fish-consumption advisories. The plan for Task 2 calls for compiling and summarizing existing data on PCB residues in fish tissue samples from Crab Orchard Lake, and then comparing Crab Orchard data with fish data from other Midwestern lakes. https://pubs.er.usgs.gov/publication/ofr20181006



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