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. 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
01 MINE AND MILL WASTE Record of Decision
September 30, 2004
Cap (engineered cap)
Cap (exsitu)
Containment (other, NOS, onsite)
Drainage/Erosion Control (other, NOS)
Engineering Control (other, NOS)
Institutional Controls
Operations & Maintenance (O&M)
Soil Amendments
01 MINE AND MILL WASTE Record of Decision Amendment
September 27, 2013
Consolidate (onsite)
Containment (other, NOS, onsite)
ESD/Amd - Cleanup/Performance Standard Change
ESD/Amd - Remedy Component Removal
ESD/Amd - Significant Cost Change
ESD/Amd - Significant Volume Change
ESD/Amd - Treatment/Disposal Location Change
01 MINE AND MILL WASTE Explanation of Significant Differences
May 05, 2016
ESD/Amd - Remedy Element Addition/Modification
ESD/Amd - Significant Cost Change
02 RESIDENTIAL YARDS Record of Decision
August 01, 1996
Containment (other, NOS, onsite)
Institutional Controls
Other (NOS)
Solidification/Stabilization (insitu)
03 MINE WASTE YARD SOILS No decision document
04 GROUND WATER Record of Decision
July 29, 1998
Institutional Controls
Operations & Maintenance (O&M)
Treatment (other, NOS, exsitu, onsite)
Water Supply (temporary replacement, other, NOS)
05 SPRING RIVER BASIN No decision document

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