Sangamo-Weston Inc./Twelve-Mile Creek/Lake Hartwell PCB Superfund Site

State TrusteeState TrusteeFederal TrusteeAO Bureau

Also Known As

None

Incident Type

Chemical

State

South Carolina

Case Status

Restoration

Location

Twelve-Mile Creek, Lake Hartwell

Authority

Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds

Financial Summary

Restoration Funds Collected:

$11,960,000.00

*Restoration Funds Allocated:

$12,117,311.55

*Restoration Funds Remaining:

$768,079.05

* Restoration Funds can contain multiple settlements/projects. All collections are placed in interest bearing accounts. For detailed information on individual settlements/ projects please visit: NRDAR Status Report

Case Description

Twelvemile Creek flows southwest to Lake Hartwell through Pickens County, South Carolina. A narrow riverine channel, the creek has steep, heavily vegetated shorelines. Approximately seven miles upstream from Lake Hartwell, the lower portion of Twelvemile Creek contains three impoundments, each associated with a dam (Easley-Central, Woodside I, and Woodside II dams from upstream to downstream).

The presence of PCBs in Twelvemile Creek/Lake Hartwell was discovered when surface water, sediment, and fish from the area were sampled in the mid-1970s. The source of this contamination was determined to be the Sangamo-Weston, Inc. capacitor manufacturing plant in Pickens, South Carolina.

Sangamo-Weston, Inc. operated the plant from 1955 to 1987. The liabilities associated with that operation were subsequently assumed by Schlumberger Technology Corporation (STC). Dielectric fluids, used in the manufacture of capacitors until 1977, contained PCBs, and materials containing these fluids were disposed via land burial. In addition, PCBs were present in discharges from the plant to Town Creek (a tributary of Twelvemile Creek). Surface water and sediment contaminated by the discharged PCBs eventually migrated downstream to Twelvemile Creek and Lake Hartwell.

Woodside II Dam scheduled to be removed to restore free-flowing Twelve Mile Creek, Credit: Industrial Economics Inc


Case Documents


 Document TypeDocument NameDocument Date

Factsheet

 Factsheet Fact Sheet  

Assessment;Restoration

 RCDP Restoration Compensation and Determination Plan 03/14/2006

Settlement

 Consent Decree Consent Decree 01/09/2006

Map View

Case Contact

South Carolina Ecological Services Field Office

Charleston, SC | (843) 727-4707 | http://www.fws.gov/charleston/

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