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Mound Plant
Dayton, Montgomery and Greene Counties, Ohio
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Office: Ohio Operations Office
Size:
306 acres (0.5 square mile)
NPL Status:
Placed on the NPL on November 21, 1989.
Mission:
The Mound Plant has been in continuous use since 1948. Its main mission was to
manufacture non-nuclear components and tritium-containing components for
nuclear weapons that are assembled at another site. Other activities include
the separation, purification, and sale of stable isotopes of the noble gases;
solar energy; fossil fuels; nuclear safeguards; waste management; heat source
testing (plutonium); and fusion fuel systems. In 1995, the primary mission
changed to cleanup to industrial standards, as approved by EPA, in order to
sell the site for industrial use.
Overview of Environmental Conditions:
Tritium and volatile organic compound contamination of onsite and offsite
groundwater and soils contaminated with residual plutonium from past onsite
operations.
CERCLA/RCRA Remediation Funding in FY 95: $30,004,000
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Progress in Reaching Interagency Agreement
DOE and EPA Region V executed an FFA on August 6, 1990. The State of Ohio
expressed an interest in developing a three-party agreement, with the State of
Ohio being added to the FFA. Negotiations were held on the development of the
new three-party FFA, which were culminated by the signing of this new agreement
on July 15, 1993.
Specific Cost Estimates and Budgetary Proposals Involved in Each Interagency
Agreement
Funds budgeted for environmental restoration under the FFA total $42.7 million
of appropriated funding for FY 96 and $44.7 million for FY 97 according to the
request in the President's Budget.
Public Comments Regarding Interagency Agreements
Prior to FY 93, limited public comments were received on the original 1990 FFA.
Most of those comments inquired why the site was placed on the NPL. Limited
comments were received during the FY 93 comment period for the new three-party
FFA (no formal comment period in FY 94). EPA Region V, the State of Ohio, and
DOE evaluated these comments and determined that no modifications to the FFA
were required.
Progress in Conducting Remedial Investigations/Feasibility Studies
The Mound Plant originally was divided into nine OUs that separated the plant
into discrete geographical units. OU 7 (Limited Action Sites) and OU 8
(Underground Tanks) had previously been closed out as needing no further
action. OU 3 (Miscellaneous Sites) was closed out in 1993 as needing no further
action. During FY 95, the ROD was completed for OU 1 (Area B/Groundwater). The
design phase of the Miami-Erie canal removal action was initiated. The EPA
approved the sale or lease of a 30-acre parcel of land.
Mound is currently re-baselining its cleanup effort to be more action oriented.
Further assessment of the scope will be at the release site level. This
re-baselining will result in an acceleration of cleanup at a reduced cost.
Progress in Conducting Remedial Actions
Implementation of three removal actions was completed in FY 95 for the B
Building Solvent Storage Shed, the Firefighter Training Pit, and Area 7 tank
removal. The B Building solvent shed has been dismantled, and a soil vapor
extraction system was installed and operated to remove VOCs from the soil. The
Area 7 tank removal was completed. Bioremediation was used to remediate
diesel-contaminated soil from the firefighting training pit. Four subprojects
of the special metallurgical building project were completed. They included
structure removal, stack decontamination, breezeway removal, and catch basin
remediation.
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