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5.2 Contaminant Migration Migration of petroleum hydrocarbon or volatile organic compound (VOC) contamination is generally via groundwater. Therefore, only those contaminant release sites located hydrologically upgradient relative to the subject property are expected to represent a potential environmental concern to the subject property. Contaminated sites located hydrologically M downgradient of the subject property are not expected to represent a potential threat to the groundwater quality beneath the subject property. Sites that are situated hydrologically cross- ,5J gradient relative to the subject property are not expected to represent a concern unless close proximity allows for the potential of lateral migration. As discussed in Section 2.3, groundwater in the vicinity of the subject property is inferred to flow to the southwest. 5.3 Record Details National Priorities List (NPL) is EPA's national listing of contaminated sites targeted for cleanup because they pose a threat to human health and the environment. The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA or Superfund) authorizes and requires the EPA to investigate, categorize, and enforce the cleanup of hazardous waste sites on the NPL. An NPL site on or near a particular property may threaten the environmental integrity of the property or affect its marketability. No sites within a 1-mile radius of the subject property were identified during the NPL database (� search. Federal Delisted NPL List consists of sites that no longer require further response actions as determined by the EPA. No sites within a '/Z-mile radius of the subject property were identified during the Delisted NPL (3 5l� database search. J CERCLIS and CERCLIS/NFRAP List consists of sites that the EPA has investigated or is �3 J presently investigating for release or threatened release of hazardous substances, which may be subject to review in accordance with the terms and conditions of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA, also known as Superf ind). Sites listed on the "No Further Remedial Action Planned" (NFRAP) database are sites where, following an initial investigation, no contamination was found, contamination was removed quickly, or the contamination was not serious enough to require federal Superfund or NPL consideration. Two sites within a 'h-mile radius of the subject property were identified during the �57 CERCLIS/NFRAP database search. These sites were plotted in excess of '/-mile from the subject property or have been granted an NFRAP status by the regulatory agency. Based on the regulatory status and relative distance from the subject property, they are not expected to 4,o represent a significant environmental concern. Phase I Environmental Site Assessment AEI Project No.274968 October 11,2007 Page 16