P674 Toxicity of Silver in Water and Sediment to the Amphipod Hyalla azteca. Call, D*,1, Polkinghorne, C2, Markee, T2, Brooke, L2, Geiger, D2, Gorsuch, J3, Robillard, K3, 1 University of Dubuque, Dubuque, IA2 University of Wisconsin-Superior, Superior, WI3 Eastman Kodak Company, Rochester, NY

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P675 A Primary Study on Biotoxicity Test Using Nitrifying Bacteria in Sediment. Chun-hong, Dong*,1, Hong-ying, Hu2, Yi, Qian3, 1 Department of Environmental Science and Engineering, Tsinghua University, Beijing, China2 Department of Environmental Science and Engineering, Tsinghua University, Beijing, China3 Department of Environmental Science and Engineering, Tsinghua University, Beijing, China

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P676 Sediment Quality Assessment of Three Urban Lakes - Lakes Washington, Sammamish and Union. Lester, Deborah*,1, Wilson, Dean1, 1 King County Department of Natural Resources, Water and Land Resources Division, Seattle, WA, USA

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P677 Use of a Correction Factor for Interpreting Historical Amphipod Bioassays at Navy Offshore Facilities in San Francisco Bay, California. Ward, Jeffrey*,1, Michael, D2, Holder, J3, Leather, J5, Pound, M4, 1 Battelle Marine Sciences Laboratory, Sequim, WA, USA2 Neptune and Company, Los Alamos, NM, USA3 ENTRIX, Inc, Ventura, CA, USA5 SPAWAR Systems Center San Diego, San Diego, CA, USA4 Southwest Division Naval Facilities Engineering Command, San Diego, CA, USA

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P678 Joint Exposure to Cadmium & Phenanthrene Elicit Antagonistic Responses in a Population of a Freshwater Oligochaete. Gust, Kurt*,1, Fleeger, John1, 1 Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, US

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P679 Combined effects of 2,4,6-trinitrotoluene and phenanthrene: Increased toxicity to Hyalella azteca. Duke, Bryand*,1, Steevens, Jeffrey2, 1 ASI Corporation, Vicksburg, MS, USA2 U.S. Army ERDC, Vicksburg, MS

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P680 A Sediment Toxicity Assessment at a Nuclear Plant in Western Kentucky and Management Suggestions. Meister, Scott*,1, Halbrook, Richard1, 1 Southern Illinois University, Carbondale, IL

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P681 Comparing risks to manage contaminated sediments. Bridges, Todd*,1, von Stackelberg, Katherine2, Cura, Jerome2, 1 US Army Engineer Research and Development Center, Vicksburg, MS, USA2 Menzie-Cura and Associates, Chelmsford, MA, USA

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