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MDE_Sediment_LBC_Data_Nov_2019_Updated
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Lower Beaverdam Creek
PCB Investigation Sediment
Updated February 2021
Maryland Department of the Environment
Land Restoration Program
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Twenty locations were identified along the entire length of LBC, two of its tributaries (Cabin Branch and</SPAN></P><P><SPAN>Cattail Branch), and reference points in the NEB and NWB for surface water and sediment sampling, in</SPAN></P><P><SPAN>consultation with MDE’s Water and Science Administration as well as Prince George’s County</SPAN></P><P><SPAN>Department of the Environment. Samples were collected according to the work plan for this effort.</SPAN></P><P><SPAN>Sample locations, rationale, and identification are provided in Table 1. Sample locations are shown on</SPAN></P><P><SPAN>Figure 1. All sampling was conducted on November 20, 2019, by two separate field teams. In the 30 days</SPAN></P><P><SPAN>prior to sampling, there was significant rainfall (5.72 inches at the rain gage near Beltsville, MD).</SPAN></P><P><SPAN>However, most of this occurred at the end of October. Between November 2, 2019 and November 20,</SPAN></P><P><SPAN>2019, only 0.38 inches of rain was recorded at this station. A moderate rainfall occurred on November</SPAN></P><P><SPAN>19, the day before sampling, with 0.2 inches of rain recorded at nearby weather stations. However,</SPAN></P><P><SPAN>water velocity and streamflow data from the USGS gage station on LBC indicate that by the time</SPAN></P><P><SPAN>sampling occurred on November 20, LBC had returned to baseflow conditions, with discharge around 7</SPAN></P><P><SPAN>cubic feet per second (USGS Gage Station data). </SPAN></P></DIV></DIV></DIV>
Elizabeth Green (Retired)
Benjamin J. Daniels, Ph.D., P.G.
Remedial Project Manager
Federal Assessment and Remediation Division Land and Materials Administration
Maryland Department of the Environment
1800 Washington Boulevard, Suite 625
Baltimore, Maryland 21230
ben.daniels@maryland.gov
410-537-3346 (O)
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