Superfund Information Systems: Site Profile

Superfund Site:

SANGAMO WESTON, INC./TWELVE-MILE CREEK/LAKE HARTWELL PCB CONTAMINATION
PICKENS, SC

Operable Units

Below, EPA has provided a list of the remedial actions selected pertaining to each operable unit.

EPA issues Records of Decision (RODs) to explain which cleanup methods will be used at Superfund National Priorities List sites. EPA has two primary documents that it may use to identify changes to the remedies selected in RODs. EPA uses a ROD Amendment when it needs to make a fundamental change to the remedy. EPA publishes an Explanation of Significant Differences (ESD) for significant changes.

During cleanup, complex sites may be divided into several distinct areas to make the response more efficient. These areas, called operable units (OUs), may address geographic areas, specific problems, or medium (e.g., groundwater, soil) where a specific action is required. The remedies are displayed for the OU numbers indicated in the original decision document. OU numbers may change over time.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

OU ID Name Decision Document Cleanup Technologies Selected
in the Decision Document
00 SITEWIDE Not applicable
01 PLANT SITE + 6 REMOTE SITES Record of Decision
December 19, 1990
Air Stripping (P&T, exsitu)
Carbon Adsorption (liquid phase, P&T, exsitu)
Discharge (surface water/NPDES discharge)
Dredging or Excavation
Monitoring
Revegetation
Thermal Desorption (exsitu, onsite)
01 PLANT SITE + 6 REMOTE SITES Explanation of Significant Differences
September 10, 1991
ESD - Nonfundamental Change (other)
01 PLANT SITE + 6 REMOTE SITES Explanation of Significant Differences
June 18, 1993
ESD/Amd - Cleanup/Performance Standard Change
01 PLANT SITE + 6 REMOTE SITES Record of Decision Amendment
September 29, 2009
Chemical Oxidation (insitu)
Institutional Controls
Monitoring
02 WATERSHED-OU02 Record of Decision
June 28, 1994
Institutional Controls
Monitoring
02 WATERSHED-OU02 Explanation of Significant Differences
September 03, 2009
ESD - Nonfundamental Change (other)

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