U.S. Fish & Wildlife Service Natural Resource Damage Assessment and Restoration Program Sangamo Weston, Inc./Twelvemile Creek/Lake Hartwell PCB Contamination Superfund Site, South Carolina The Problem injuries to natural resources The Sangamo Weston, Inc./Twelvemile caused by PCBs, to spend an Creek/Lake Hartwell PCB additional $8 to $10 million to Contamination Superfund Site, located purchase and remove two in Pickens, South Carolina, was a hydroelectric dams on capacitor manufacturing plant that Twelvemile Creek, and to released an estimated 441,000 lbs of conduct stream restoration polychlorinated biphenyls (PCBs) into activities, and to provide the Twlevemile Creek system between $160,000 for ecological 1955 and 1977. Operable Unit 2 of the monitoring of the dam removal Site consists of the approximately 40 project. Monies paid by stream miles of Twelvemile creek and it Schlumberger will be used to tributaries; the Twelvemile Creek Arm conduct or finance restoration of Lake Hartwell, a 56,000 acre man- projects designed to restore, made reservoir created by the U. S. replace, or protect natural Army Corps of Engineers through the resources at the site and to construction of Hartwell Dam across the compensate the public for Savannah River in 1963; portions of the natural resource injuries and Keowee and Seneca River arms of Lake lost resource use. Purchase and Hartwell; and Lake Hartwell itself. removal of the two Historical sampling events in the hydroelectric dams will provide Twelvemile Creek watershed and Lake multiple ecological benefits, Hartwell have documented the presence including speeding the EPA of widespread PCB contamination in remedy by enhancing transport sediments, surface water, and fish from of uncontaminated sediment the Sangamo Weston outfall as far through Twelvemile Creek and downstream as Hartwell Dam. Fish speeding the burial of consumption advisories have been in contaminated sediment. Dam place on Twelvemile Creek and Lake removal is expected to restore the Hartwell since 1976. hydrology of lower Twelvemile Creek to a free-flowing riverine system, Restoring the Resources improving biodiversity and population The U.S. Fish and Wildlife Service, density of native species, and providing along with the U.S. Army Corps of more appropriate habitat for submerged Engineers, Georgia Department of and emergent vegetation. These Natural Resources, South Carolina improvements will be supplemented by Department of Natural Resources, stream corridor restoration which will South Carolina Department of Health provide better substrate for native and Environmental Control, and the vegetation, improve bottom habitat for South Carolina Office of the Governor, native fishes, establish a more natural have reached settlement of a natural sedimentation regime, and improve Woodside II Dam scheduled to be removed to resources damage claim for the Site with riparian habitat. restore free-flowing Twelve Mile Creek. Both Schlumberger Technology Corporation photos credit Industrial Economics Inc. (Schlumberger), current owner of the For more information please contact: Sangamo Weston plant site. Final Diane Duncan judgment was entered in the U.S. U.S. Fish and Wildlife Service District Court for the District of South Charleston Field Office Carolina, Anderson Division, on May 30, 176 Croghan Spur Road 2006. Schlumberger, headquartered in Suite 200 Texas, has agree to pay $11.8 million to Charleston, SC 29407 the Natural Resource Trustees for 1 843/727 4704 extension 218 [email protected] .