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METHODS AND METRICS FOR EVALUATING ENVIRONMENTAL DREDGING AT THE ASHTABULA RIVER AREA OF CONCERN (AOC)
Mills, M., R. Brenner, J. Schubauer-Berigan, J. Lazorchak, and J. Meier.
EPA 600-R-16-322, 215 pp, 2016
Environmental dredging relies on rapid mechanical removal of the contaminated sediment layer and subsequent off-site confined disposal. Environmental dredging was selected as the remedy of choice for remediation and cleanup of the Ashtabula River area of concern (AOC), a highly contaminated sediment site in northeastern Ohio. PCBs constituted the primary COC for this site, with PAHs and inorganic chemicals comprising secondary COCs. Dredging on this AOC was carried out from fall 2006 through fall 2007. The site was extensively characterized in the spring and summer of 2006 prior to dredging. A comprehensive evaluation and monitoring program was conducted by EPA during the dredging period, immediately following dredging in early 2008, and then through 2011 to assess long-term recovery. This report summarizes and interprets the results of the 6-year study to monitor pollutant fate and transport and ecosystem recovery through the use of bathymetry; sampling and chemical analysis of sediment, water, and indigenous fish; and deployment and follow-up retrieval and analysis of macrobenthos and passive samplers. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100QSTV.txt
EPA 600-R-16-322, 215 pp, 2016
Environmental dredging relies on rapid mechanical removal of the contaminated sediment layer and subsequent off-site confined disposal. Environmental dredging was selected as the remedy of choice for remediation and cleanup of the Ashtabula River area of concern (AOC), a highly contaminated sediment site in northeastern Ohio. PCBs constituted the primary COC for this site, with PAHs and inorganic chemicals comprising secondary COCs. Dredging on this AOC was carried out from fall 2006 through fall 2007. The site was extensively characterized in the spring and summer of 2006 prior to dredging. A comprehensive evaluation and monitoring program was conducted by EPA during the dredging period, immediately following dredging in early 2008, and then through 2011 to assess long-term recovery. This report summarizes and interprets the results of the 6-year study to monitor pollutant fate and transport and ecosystem recovery through the use of bathymetry; sampling and chemical analysis of sediment, water, and indigenous fish; and deployment and follow-up retrieval and analysis of macrobenthos and passive samplers. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100QSTV.txt
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