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Record of Decision System (RODS)

MW MANUFACTURING

Abstract

Site Name:  MW MANUFACTURING
Address:  STATE ROUTE 54 AND I-80 
City & State:  VALLEY TOWNSHIP  PA  17821
County:  MONTOUR
 
EPA ID:  PAD980691372
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-92/153
ROD Date:  06/30/1992
Operable Unit(s):  01
 
Media:  Ground water
 
Contaminant:  VOCs, Other Organics, Metals
 
Abstract:  SITE HISTORY/DESCRIPTION: The 15-acre MW Manufacturing Site is a former copper recovery facility in Monitor County, Pennsylvania. Land use in the area is mixed farmland and residential with a wetlands area, Amuses Creek, located 700 feet west of the site. The estimated 5,200 people who reside within 1/4 mile of the site use private ground water wells as their drinking water source. From 1969 to 1972, MW Manufacturing Company, which is a subsidiary of Nile Corporation, used the site for copper recovery from scrap wire, using both mechanical and chemical processes. During this time generated carbon wastes by the chemical process and generated fluff material (fibrous insulation materials contaminated with metals and solvents) were dumped onsite, and spent solvents were allegedly disposed of onsite. In 1972, MW Manufacturing filed for bankruptcy and the Philadelphia National Bank acquired the property by default. In 1976, Warehouse 81, Inc., acquired the site and unsuccessfully attempted to recover copper from the large waste piles of fluff material. In 1982, the state performed an initial remedial investigation that revealed several areas posing potential threats to public health: the carbon waste pile; four wire-fluff waste piles; a surface impoundment; a buried lagoon; and contaminated soil, drums, and storage tanks. Based on this investigation, the site has been divided into three OUs to address cleanup of all contaminated media. A 1989 ROD (OU1) addressed the carbon waste pile by excavating the carbon waste pile and incinerating the waste offsite. A 1990 ROD (OU2) addressed treating the fluff waste, contaminated soil, drums, tanks, and the lagoon. This ROD provides a final remedy for the contaminated of the ground water and the adjacent wetland areas as OU3. The primary contaminants of concern affecting the ground water are VOCs, including benzene, PCE, and TCE; other organics, including PAHs, pesticides, and phenols; and metals. PERFORMANCE STANDARDS OR GOALS: Ground water clean-up goals are based on state standards, SDWA MCLs and MCLGs under SDWA, CWA, Pennsylvania Clean Streams Law, and background levels. The clean-up goals will attain background concentrations that will be determined during the remedial design. In the event that the background concentration of the contaminant is not detected, the most stringent chemicalspecific ground water clean-up goal will be met. INSTITUTIONAL CONTROLS: As part of a contingency, institutional controls may be implemented if necessary to restrict access to portions of the aquifer.
 
Remedy:  SELECTED REMEDIAL ACTION: The selected remedial action for this site includes constructing a public water supply system to supply drinking water to present and future affected residences; extracting contaminated ground water and treating the water onsite using chemical precipitation to remove inorganics, and airstripping to remove VOCs; treating effluent from the air stripping process using carbon adsorption to remove organics, followed by onsite discharge to surface water; treating air emissions from the air stripping process using thermal destruction, and recycling the residual carbon waste offsite; disposing of any collected free product offsite; dewatering and disposing of sludge generated during the treatment process offsite at a RCRA landfill; and implementing a ground water monitoring program. If it is determined by EPA and the state that certain portions of the aquifer cannot be restored to background levels, the ROD specifies modification of the selected remedy, which include engineering controls; physical barriers, or long-term pumping to contain contamination; institutional controls to limit access; and waiver of chemicalspecific ARARs for portions of the aquifer where further contaminant reduction is impracticable. The estimated present worth cost for this remedial action is $37,402,000, which includes an annual O&M cost of $1,568,000 for 30 years, with $20,000 additional every 5 years.
 
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