Superfund Information Systems: Site Profile

Superfund Site:

GILT EDGE MINE
LEAD, SD

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 SURFACE Record of Decision
September 29, 2008
Consolidate (onsite)
Containment (other, NOS, onsite)
Cover (soil)
Institutional Controls
Pumping
Treatment (other, NOS, onsite)
01 SURFACE Explanation of Significant Differences
September 30, 2014
Cap (engineered cap)
Demolition
ESD/Amd - Remedy Component Removal
ESD/Amd - Remedy Element Addition/Modification
ESD/Amd - Treatment/Disposal Location Change
Excavation
Leachate Control
Soil Amendments
02 WATER TREATMENT Record of Decision
April 23, 2001
Discharge (other, NOS)
Filtration (P&T, exsitu)
Institutional Controls
Other (NOS)
Precipitation (P&T, exsitu)
02 WATER TREATMENT Record of Decision
November 30, 2001
Discharge (other, NOS)
Filtration (P&T, exsitu)
Neutralization (P&T, exsitu)
Precipitation (P&T, exsitu)
Pumping
02 WATER TREATMENT Record of Decision
Data not available
03 RUBY DUMP/CAP CLOSURE Record of Decision
August 30, 2001
Bottom Liner
Cap (engineered cap)
Drainage/Erosion Control (other, NOS)
Engineering Control (other, NOS)
Other (NOS)
03 RUBY DUMP/CAP CLOSURE Record of Decision
Data not available

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