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City & State:  PLYMOUTH  ME  04969
EPA ID:  MED985466168
EPA Region:  01
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-02/021
ROD Date:  09/24/2002
Operable Unit(s):  01
Abstract:  This decision document presents the selected remedial action for the West Site/Hows Corner Superfund Site in Plymouth, Maine. The West Site/Hows Corner Superfund Site is located on Sawyer Road, Penobscot County, Plymouth, Maine. The site is defined as a 17-acre parcel of land owned by George West and the groundwater beneath the surrounding properties where contamination has come to be located. Mr. West used a small, 2-acre portion of the site to operate a waste oil facility from 1965 to 1980. This 2-acre portion of the site is referred to as the source area to distinguish it from the term site that, as previously mentioned, also includes the groundwater beneath the surrounding properties where contamination has come to be located. The area surrounding the source area is rural residential with mixed woods and open fields. In 1995, the U.S. EPA placed the site on the National Priorities List (NPL) due to the discovery of contaminated soil within the source area and contaminated groundwater underlying the source area and surrounding properties. Waste oils were stored in 8 above ground storage tanks (ASTs) ranging in volume from 1,000 to 20,000 gallons. According to documents obtained from Mr. West and other sources, in excess of 235,000 gallons of waste oil and other liquids were received at the facility for storage and transfer during operations. After separating the waste oils based on density, lighter oils were sold to greenhouses, paper companies, and others as fuels, and heavier oils were spread on dirt roads for dust control. Operations ceased in 1980, and the tanks were disassembled and sold as scrap.
Remedy:  This ROD sets forth the selected remedy for Operable Unit 1 at the West Site/Hows Corner Superfund Site. OU1 will target groundwater underlying the Site where volatile organic compounds (VOCs) are detected at concentrations below 10 parts per million (ppm). Groundwater with VOC concentrations below 10 ppm is generally located outside of the 2-acre fenced area of the site and includes all groundwater where the contamination has come to be located. The cleanup action described in this ROD will require groundwater with VOCs greater than or equal to 10 ppm be contained within the Source Area; monitored natural attenuation of non-source area groundwater; and environmental monitoring with a contingency that would require safe drinking water be provided to residents whose private water supply poses an unacceptable risk. Institutional controls will also be used to prevent the use of both source area and non-source area groundwater until the cleanup standards have been met. This cleanup approach will also prevent the further migration of source area groundwater and potentially restore non-source area groundwater to safe drinking water standards. The selected remedy is a comprehensive approach that addresses all current and potential future risks posed by non-source area groundwater (OU1). As a result of the previous removal actions, contaminated groundwater is the only medium requiring remedial action. The state of Maine concurs with the Selected Remedy.
Text:  View full-text ROD [ 3.54M ]
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