ABSTRACT
The Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) and the Superfund Amendments and Reauthorization Act of 1986 (SARA) require the investigation and subsequent cleanup of hazardous waste sites listed on the National Priorities List (Superfund sites). The history of Superfund site activities is frequently uncertain. In addition, disposal and/or discharge records for Superfund sites are often inaccurate and incomplete. Thus, the nature and extent of contamination is unknown and is usually highly variable over short distances. As a result, thorough investigations of the soil and ground water at Superfund sites are generally required as part of the site Remedial Investigation (RI).
