Superfund Information Systems: Site Profile

Superfund Site:

PADUCAH GASEOUS DIFFUSION PLANT (USDOE)
PADUCAH, KY

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
01 106 ADM ORDER / CONSENT No decision document
02 NW PLUME CONTAINMENT 1 Record of Decision
July 22, 1993
Air Stripping (P&T, exsitu)
Carbon Adsorption (liquid phase, P&T, exsitu)
Discharge (surface water/NPDES discharge)
Hydraulic Control (containment)
Ion Exchange (P&T, exsitu)
Treatment (other, NOS, exsitu, onsite)
Treatment (other, NOS, insitu)
02 NW PLUME CONTAINMENT 1 Explanation of Significant Differences
January 27, 2011
ESD - Nonfundamental Change (other)
03 NE PLUME CONTAINMENT 1 Record of Decision
June 15, 1995
Discharge (surface water/NPDES discharge)
Filtration (P&T, exsitu)
Hydraulic Control (containment)
Monitoring
Treatment (other, NOS, exsitu, onsite)
03 NE PLUME CONTAINMENT 1 Explanation of Significant Differences
January 13, 2016
Discharge (surface water/NPDES discharge)
ESD/Amd - Remedy Element Addition/Modification
05 WAG 1 & 7 Record of Decision
August 10, 1998
Engineering Control (other, NOS)
Institutional Controls
Leachate Control
Monitoring
No Further Action
06 NS DIV DITCH Record of Decision
March 28, 1994
Discharge (other, NOS)
Drainage/Erosion Control (other, NOS)
Engineering Control (other, NOS)
Institutional Controls
Ion Exchange (P&T, exsitu)
Precipitation (P&T, exsitu)
Treatment (other, NOS, insitu)
07 WAG 13 No decision document
08 WAG 22 BURIAL GROUNDS Record of Decision
August 22, 1995
Cap (engineered cap)
Institutional Controls
Monitoring
09 WAG 23 PCB SPILL No decision document
12 WAG 17 Record of Decision
September 29, 1997
No Action
No Further Action
13 WAG 6 No decision document
15 WAG 27 Record of Decision
August 10, 1998
Bioremediation (other, NOS, insitu)
Monitoring
Off-gas Treatment (other, NOS)
Treatment (other, NOS, onsite)
16 WAG 28 No decision document
18 SURFACE WATER OPERABLE UNIT Record of Decision
August 21, 2002
Cap (engineered cap)
Disposal (offsite)
Excavation
Institutional Controls
19 GROUNDWATER OPERABLE UNIT Record of Decision
August 09, 2005
Institutional Controls
Monitoring
Monitoring (ambient air)
Thermal Treatment (insitu)
Treatment (other, NOS, insitu)
19 GROUNDWATER OPERABLE UNIT Record of Decision
March 20, 2012
Bioremediation (other, NOS, insitu)
Drainage/Erosion Control (other, NOS)
Institutional Controls
Monitoring
No Action
Residuals Treatment/Disposal (onsite)
Revegetation
Sampling
Vertical Engineered Barrier (deep soil mixing)
20 D & D OPERABLE UNIT No decision document
21 SOILS OPERABLE UNIT No decision document
22 BURIAL GROUNDS OPERABLE UNIT No decision document
23 CERCLA WASTE DISPOSAL ALTERNATIVES No decision document
24 C-400 COMPLEX No decision document
26 SOILS AND SLABS OPERABLE UNIT No decision document
27 LAGOONS OPERABLE UNIT No decision document
28 FACILITY D&D OPERABLE UNIT No decision document
29 DUF 6 FOOTPRINT UNDERLYING SOILS OPERABLE UNIT No decision document
30 FINAL COMPREHENSIVE SITE OPERABLE UNIT No decision document

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