Superfund Information Systems: Site Profile

Superfund Site:

MADISON COUNTY MINES
FREDERICKTOWN, MO

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 SITE EVALUATION/DISPOSITION - OU 0 Not applicable
03 MADWIDE RESIDENTIAL - OU 3 Record of Decision
July 31, 2008
Disposal (offsite)
Excavation
Institutional Controls
Solidification/Stabilization (exsitu, offsite)
03 MADWIDE RESIDENTIAL - OU 3 Record of Decision
September 26, 2014
COC Only
Disposal (offsite)
Excavation
Institutional Controls
Residential Topsoil Replacement
Revegetation
Sampling
Water Supply (connect to municipal water supply system)
Water Supply (install new private domestic wells)
Water Supply (point-of-use/point-of-entry treatment)
Water Supply (temporary replacement, other, NOS)
04 CONRAD - OU 4 Record of Decision
September 29, 2011
Cap (engineered cap)
Cap (exsitu)
Consolidate (onsite)
Containment (other, NOS, onsite)
Containment Cell (upland/adjacent)
Drainage/Erosion Control (other, NOS)
Excavation
Institutional Controls
Monitoring
Monitoring (groundwater)
Monitoring (surface water)
Operations & Maintenance (O&M)
Stream Realignment
Wetland for Treatment (constructed engineered wetland)
05 CATHERINE/SKAGGS PILES - OU 5 Record of Decision
September 27, 2012
Cap (engineered cap)
Cap (exsitu)
Consolidate (onsite)
Drainage/Erosion Control (other, NOS)
Excavation
Institutional Controls
Monitored Natural Recovery
Monitoring
Revegetation
Sampling

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