Superfund Information Systems: Site Profile

Superfund Site:


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.

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 No decision document
01 NW AREA Record of Decision
July 29, 1986
Data not available
02 SW AREA No decision document
03 CASS LAKE CITY DUMP Record of Decision
July 29, 1986
Discharge (surface water/NPDES discharge)
Filtration (P&T, exsitu)
Hydraulic Control (containment)
Treatment (other, NOS, exsitu, onsite)
04 ADMINISTRATIVE No decision document
05 ADMINISTRATIVE No decision document
06 ADMINISTRATIVE No decision document
07 HOUSE DUST Record of Decision
October 14, 2005
Dust Suppression
Physical Separation (exsitu, onsite)
08 SOILS No decision document
09 FOX CREEK No decision document
10 GROUNDWATER No decision document
11 OU11 No decision document
12 SEMS Record of Decision
July 29, 1986
Cap (engineered cap)
Carbon Adsorption (liquid phase, P&T, exsitu)
Extraction (recovery/vertical well)
Operations & Maintenance (O&M)
Water Supply (permanent replacement, other, NOS)

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