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Record of Decision System (RODS)



Address:  MOUND RD 
City & State:  MIAMISBURG  OH  45342
EPA ID:  OH6890008984
EPA Region:  05
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-99/110
ROD Date:  07/22/1999
Operable Unit(s):  11
Media:  Groundwater, Soil
Contaminant:  Base Neutral Acids, Dioxins/Dibenzofurans, Inorganics, Metals, PAH, Pesticides, Radioactive, VOC
Abstract:  The Mound Plant Site was placed on the CERCLA National Priorities List ( NPL) in 1989. The Department of Energy ( DOE) signed a CERCLA Section 120 Federal Facility Agreement with the USEPA, effective October 1990. A similar tripartite agreement was signed among the DOE, USEPA, and Ohio Environmental Protection Agency ( OEPA) in 1993. The Operable Unit 1 (OU1) Remedial Investigation/Feasibility Study (RI/FS) was conducted between 1991 and 1994 to identify the types, quantities, and locations of contaminants and to develop ways of addressing the contamination problems.

The DOE Mound Plant is located within the city limits of Miamisburg, in Southern Montgomery County, Ohio. The site is approximately 10 miles south-southwest of Dayton and 45 miles north of Cincinnati. Miamisburg is predominantly a residential community with supportive commercial facilities and industrial development. The adjacent upland areas are used primarily for residences and agriculture or are unused open spaces.

The Mound property is divided into 19 "release blocks," which are contiguous tracts of property designated for transfer of ownership. These 19 release blocks may be reconfigured to accommodate transfer of Mound property for economic development. As a result of historic disposal practices and contaminant releases to the environment, the Mound Plant was placed on the National Priorities List in November, 1989. The Department of Energy (DOE) signed a Comprehensive Environmental Response Compensation and Liability Act (CERCLA) Federal Facility Agreement with US EPA, effective October 1990. DOE serves at the lead agency for CERCLA-related activities at this site.

Operable Unit (OU) 11:
OU 11 is Release Block (RB) H which is located in the northeast corner of the developed area of the plant. RB H is generally bound to the south by the main plant entrance, to the east by an offsite community golf course, to the north by off-site residents, and to the west by a fenced parking lot. There are no structures in RB H. RB H includes one Potential Release Site (PRS) that has undergone previous investigation. Before transfer of a release block can be completed, all buildings and PRSs must be evaluated for protectiveness to human health and the environment for industrial reuse or remediated to be protective.

A Record of Decision addressing OU 11 was completed in July, 1999.

Release Block (RB) D is located in the southeast corner of the developed area of the plant. RB D is bound to the south by the undeveloped portion of the Mound Plant (the "South Property"), to the east by offsite residences, to the north by a parking lot and group of small buildings, and to the west by a fenced area for storage of Investigative Derived Materials (IDM).

A Record of Decision addressing RB D was completed in February, 1999.
Remedy:  The selected remedy for release block (RB) H is institutional controls in the form of deed restrictions on future land use. Specifically, the selected remedy includes: ensuring that industrial land use is maintained; prohibiting the use of bedrock groundwater; providing site access for federal and state agencies for the purpose of taking response actions including sampling and monitoring; and prohibiting removal of release block H soils from the Department of Energy (DOE) Mound property boundary without approval of the State, or their successor agencies. DOE, as the lead agency, has the responsibility to monitor, maintain and enforce these institutional controls. This responsibility includes the duty to conduct annual assessments of compliance with deed restrictions and the duty to enforce the deed restrictions if any non-compliance is detected.

The soils within RB H have not been evaluated for any use other than on-site industrial use. Any off-site disposition of the RB H soil without proper handling, sampling, and management could created an unacceptable risk to off-site receptors. An objective of the preferred alternative is to prevent residual exposure to soils from RB H.

Estimated Capital Cost: Not Provided
Estimated Annual O&M Costs: $5,000
Estimated Present Worth Costs: Not Provided
Text:  View full-text ROD [ 462K ]
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