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To identify ongoing sources of PCB contamination in the Lower Beaverdam Creek (LBC), a tributary that feeds into the Anacostia River in Washington D.C. Previous work has shown elevated concentrations of PCBs in several locations within LBC. This project set out to further investigate ongoing PCB sources in the less characterized upper portion, where LBC meets up and runs parallel to Pennsy Drive in Hyattsville, MD |
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To identify ongoing sources of PCB contamination in the Lower Beaverdam Creek (LBC), a tributary that feeds into the Anacostia River in Washington D.C. Previous work has shown elevated concentrations of PCBs in several locations within LBC. This project set out to further investigate ongoing PCB sources in the less characterized upper portion, where LBC meets up and runs parallel to Pennsy Drive in Hyattsville, MD |
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Ben Marino, Upal Ghosh, Nathalie Lombard, Yu Ting, Jasmine Ives, and Eswar Chandra. Technical Memorandum: Source Tracking of PCB Contamination in Lower Beaverdam Creek. Department of Chemical, Biochemical, and Environmental Engineering
University of Maryland, Baltimore County. December 6, 2024 |
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN><SPAN>12 passive samplers made of polyethylene sheets were deployed in various locations along the stretch of LBC that runs parallel to Pennsy Drive in Hyattsville, MD. The samplers are placed in a metal mesh envelope which is attached to a u-post to secure the sampler to the location site. The samplers were positioned to sample the overlying water in the creek. Nine samplers were deployed in LBC, and three samplers were deployed in smaller tributaries that feed into LBC, to identify areas of elevated PCB concentrations in the surface water. Only surface water passive samplers were deployed (i.e., no porewater samplers were deployed in this project). The samplers were deployed on April 17</SPAN></SPAN><SPAN><SPAN>th</SPAN></SPAN><SPAN><SPAN>, 2024 and retrieved on June 18</SPAN></SPAN><SPAN><SPAN>th</SPAN></SPAN><SPAN><SPAN>, 2024, for a total deployment time of 62 days. The samplers were taken back to the Ghosh lab at UMBC where PCBs were extracted from the passive samplers with hexane, treated with copper to remove sulfur from the samples, and run through a silica gel column to remove organic compounds that interfere with PCB detection on the analytical machinery. The samples were run on a Agilent 6890N Gas Chromatograph with electron capture detection for quantification and data analysis. The measurements were converted to freely dissolved water concentrations using the sample concentration, the partition coefficient between water and the sampler, and corrected for non-equilibrium using Performance Reference Compounds (PRCs) pre-loaded on the passive samplers. Standard Operating Procedure (SOP) developed by the Ghosh lab are available for each of these sample preparation and analytical methods. </SPAN></SPAN></P></DIV></DIV> |
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UMBC2024PennsyDrPassiveSW |
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["pcb passive samplers MDE UMBC"] |
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en-US |
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150000000 |
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