Evaluating Dredging Effectiveness at the Ashtabula River Challenge Since 2006, Battelle has supported the U.S. EPA Office of Research and Development (ORD) and Great Lakes National Program Office (GLNPO) at the Ashtabula River, OH, Great Lakes Legacy Act (GLLA) project site. The Ashtabula River was designated as a Great Lakes Area of Concern (AOC) due to contamination with polychlorinated biphenyls (PCBs), metals and other industrial wastes. GLNPO conducted dredging operations in 2006 and 2007 to remove contaminated sediments. ORD and GLNPO contracted Battelle to develop and evaluate assessment and monitoring methods along biological, chemical and physical lines of evidence (LOEs) in order to evaluate the short- term and long-term effectiveness of the remediation at the Ashtabula River pro

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