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City & State:  DUBLIN BOROUGH  PA  18917
County:  BUCKS
EPA ID:  PAD981740004
EPA Region:  03
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-92/145
ROD Date:  12/30/1991
Operable Unit(s):  01
Media:  Ground Water
Contaminant:  VOCs
Abstract:  SITE HISTORY/DESCRIPTION: The 4.5-acre Dublin Water Supply is a former manufacturing facility located in Dublin Borough, Bucks County, Pennsylvania. The site consists of a one-story tower building and parking lot. The surrounding area is mixed commercial and residential, with a fruit orchard bordering the site to the north and west. Ground water beneath the site contributes to the aquifer by providing a drinking water source to area residents. The ground water flows toward residential and commercial wells in the Dublin Borough and is believed to be predominantly controlled by bedrock fractures. Surface drainage, which flows in a northward direction, is absorbed by the fruit orchard or discharges to a tributary of Morris Run located northwest of the site. Since the 1930s, the site has been used for various industrial purposes and has had several owners. From the early 1930's to 1956, the site operated as a hosiery mill. In 1956, Home Window Company of Pennsylvania used the property for the manufacture ofaluminum doors and windows. In 1959, the property was purchased by Kollsman Motors Corporation (KMC) and used to manufacture mechanical and electromechanical components that are utilized in aircraft and missiles. During this time, TCE was used onsite and spent product was either poured onto the ground or stored in perforated drums. In 1973, Athlone Industries purchased the property for cleaning, stamping, and packaging softballs. TCE solvents were used as degreasing agents to assemble stamping machines. In 1986, the current owner purchased the site for antique car restoration. A portion of the site is currently leased to Laboratory Testing, Inc., for metallurgical testing. During a routine drinking water survey in 1986, the state discovered elevated levels of TCE affecting approximately 170 area homes. Under EPA's direction, the owner supplied carbon filtration units to affected residential water supplies and installed ground water monitoring wells, which indicated ground water contamination with several VOC compounds. This early action ROD addresses the provision of a permanent clean drinking water supply to affected area residents and businesses. An additional RI/FS, which commenced in 1991, will focus on remediation of the soil, ground water, and surface water in a separate clean-up action. The primary contaminants of concern affecting the ground water are VOCs, including TCE and PCE. PERFORMANCE STANDARDS OR GOALS: Chemical-specific ground water standards are based on SDWA MCLs including TCE 5 ug/l, PCE 5 ug/l; vinyl chloride 2 ug/l; cis-1,2-DCE 70 ug/l; trans-1,2-DCE 100 ug/l; 1,1-DCE 7 ug/l; and 1,1,1-TCA 200 ug/l. Performance standards for air emissions from the ground water stripping unit shall comply with the National Ambient Air Quality Standard (NAAQS) under CAA, and disposal standards for spent carbon filters shall meet RCRA requirements. INSTITUTIONAL CONTROLS: Not provided.
Remedy:  SELECTED REMEDIAL ACTION: The selected remedial action for this site includes installing and operating a new water supply well, or operation of the existing well within the plume, construction and operation of an onsite air stripping and vapor phase carbon adsorption treatment system, or other appropriate technology for the well; discharging the treated water to the municipal water supply system; expanding the Dublin Borough public distribution system to supply well and treated water to affected residences; and monitoring the residential and commercial wells not serviced by the public distribution system. The estimated present worth cost for this remedial action is $5,000,000, which includes an annual O&M cost of $300,000 for 30 years.
Text:  View full-text ROD [ 89K ]
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