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NATURAL RECOVERY OF PCB CONTAMINATION AT THE SANGAMO-WESTON/TWELVEMILE CREEK/LAKE HARTWELL SUPERFUND SITE
Citation:
Magar, V. S., R C. Brenner*, Zeller*, J. A. Ickes, Foote, AND J. E. Abbott. NATURAL RECOVERY OF PCB CONTAMINATION AT THE SANGAMO-WESTON/TWELVEMILE CREEK/LAKE HARTWELL SUPERFUND SITE. Presented at Dioxin 2003 Conference, Boston, MA, 8/24-29/2003.
Description:
Previous natural recoy.-contaminated sediments with data from fish and invertebrate studies at lake Hartwell. The previous sediment studies showed that natural capping of contaminated sediments with progressively cleaner sediments over time resulted to concentrations below the 1 mg/kg total PCB (t-PCB) cleanup goal. Reductive dechlorination activity resulted in the transformation of higher-chlorinated PCB congeners (congeners with 4 or more chlorines) to orthosaturated mono, di-, and trichlorobiphenyl congeners with sediment depth and time, This paper compares the fish and invertebrate PCB concentrations to surface sediment concentrations in Twelvemile Creek and upstream portions of lake Hartwell. Excerpts of this paper were also presented by Ickes et al. (2003) at the 2003 In-Situ and On-Site Bioremediation Symposium, Orlando, Florida.
This study compares the results of the lake Hartwell sediment Natural Recovery studies (Magar et al., 2002) with fish and invertebrate data collected by EPA Region 4 under their annual monitoring program, to examine the extent to which surface sediment recovery has measurably impacted the recovery of fish in the lake.