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Passive samplers and mussel
deployment, monitoring, and
sampling for organic constituents in
Anacostia River tributaries: Final
report
2016-2018
CBFO-C-20-03 https://app.box.com/s/ef6khw62m7yo05x8nvs6zrwh8fke9vfu/file/1292091292796
A 2-year monitoring program was implemented in support of the Remedial Investigation/Feasibility Study for the Anacostia River. The project is a collaborative effort among the U.S. Fish and Wildlife Service SFWS), the University of Maryland Baltimore County (UMBC), and the University of Maryland College Park (UMCP), with financial and technical support from the DC Department of Energy and Environment (DOEE). The objectives of the study were to: 1) measure concentrations of key pollutants in the water column and sediment porewater at several locations in the Anacostia River and tributaries; 2) measure concentrations of key pollutants in the air phase; 3) provide interpretation of the measurements and estimate loads to the River; and 4) assess health indicators and measure uptake of pollutants by a filter-feeding organism (Elliptio complanata). A major focus of this study was to accurately measure the freely-dissolved concentrations of the pollutants that can be directly related to toxicity and bioaccumulation in aquatic organisms in the river and to assess pollutant exchange with the sediment and air. This report presents results from the monitoring period of July 2016 to May 2018 for levels of polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and polycyclic aromatic hydrocarbons (PAHs) in different matrices in the Anacostia River and several tributaries. The freely-dissolved concentrations in the surface water and sediment porewater, and the air concentrations were measured using passive sampling. A summary of the key findings from the 2-year monitoring period are presented below. Pollutant levels in the Anacostia River and tributaries. Freely-dissolved PCB concentrations in the tributaries were lower than those in the Anacostia River, with the exception of Lower Beaverdam Creek (LBC), which exhibited PCB levels up to twenty times higher than the concentrations in the Anacostia River. Freely-dissolved concentrations in water phases (water column and sediment porewater) were similar between Summer 2016 and Summer 2017, but seasonal changes were observed with notably a factor of two decrease in the water column from Summer to Fall 2017. For all tributaries and the river, PCB concentrations measured were above the EPA Water Quality Criteria for Human Health protection for the consumption of water and organisms (0.064 ng/L; at 1 in a million incremental risk of cancer) throughout the seasons.
<DIV STYLE="text-align:Left;"><P><SPAN>Freely-dissolved PCB concentrations in the tributaries were lower than those in the Anacostia River, with the exception of Lower Beaverdam Creek (LBC), which exhibited PCB levels up to twenty times higher than the concentrations than the Anacostia River. Freely-dissolved concentrations in water phases (water column and sediment porewater) were similar between Summer 2016 and Summer 2017, but seasonal changes were observed with notably a factor of two decrease in the water column from Summer to Fall 2017. For all tributaries and the river, PCB concentrations measured were above the EPA Water Quality Criteria for Human Health protection for the consumption of water and organisms (0.064 ng/L; at 1 in a million incremental risk of cancer) throughout the seasons.</SPAN></P></DIV>
Upal Ghosh, Nathalie Lombard, Mandar Bokare University of Maryland Baltimore County Department of Chemical, Biochemical and Environmental Engineering Baltimore, MD
Alfred Pinkney U.S. Fish and Wildlife Service Chesapeake Bay Field Office Annapolis, MD Lance Yonkos, Rachel Harrison University of Maryland College Park Department of Environmental Science and Technology College Park, MD
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