Ammonium perchlorate (perchlorate) is a primary ingredient in solid rocket propellant and has been used for decades by the Department of Defense (DOD), the National Aeronautics and Space Administration, and the defense industry in the manufacturing, testing, and firing of rockets and missiles. Perchlorate has been found in the drinking water, groundwater, surface water, or soil in 35 states, the District of Columbia, and 2 commonwealths of the United States. Exposure to perchlorate affects the human thyroid, and certain levels of exposure may result in hyperthyroidism in adults and developmental delays in children. Although there is no specific federal requirement to clean up perchlorate, the Environmental Protection Agency (EPA) and state regulatory agencies have used various environmental laws and regulations to require cleanup of perchlorate by responsible parties. Between 1942 and 1945, new military uses for perchlorate led to an increase in the production of perchlorate in the United States. Between 1945 and 1967, the U.S. Navy, Western Electrochemical Company, and the American Potash and Chemical Company manufactured perchlorate at a facility in Henderson, Nevada. The United States owned part of the facility from 1953 to 1962. In 1967, the Kerr-McGee Corporation acquired the facility and continued to manufacture perchlorate until 1998, when it ceased production after the chemical was found in nearby groundwater. Kerr-McGee is presently cleaning up perchlorate contamination under a consent order with the Nevada state environmental agency. The American Pacific Corporation also manufactured perchlorate near Henderson from 1958 until 1988, when its facility was destroyed in an explosion. American Pacific relocated its perchlorate production to Utah and is currently the sole manufacturer of perchlorate in the United States. In a recent letter to GAO, Congress asked us to report on the costs, liability and financial responsibility related to perchlorate cleanup. The issue of liability for perchlorate cleanup is currently the subject of litigation between the Kerr-McGee Corporation and the United States. In 2000, Kerr-McGee initiated litigation against the United States, seeking reimbursement for cleanup costs. The case is still in the pretrial stage. The information requested above is among the issues being addressed as part of the pending court case. It is a longstanding GAO policy to refrain from taking a position on or addressing matters that are pending in litigation. During a June 2005 meeting with Congressional staff, we agreed to document why we could not undertake the study originally requested, and we also agreed to report on general issues relating to the federal government's responsibility for environmental cleanup on land that it transfers or sells to other parties. This report discusses (1) laws governing the transfer of contaminated federal property to private parties, both before and after the enactment of a 1986 amendment to the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) that specifically governs such transfers, and (2) the degree to which private parties not subject to civil actions under CERCLA may seek environmental cleanup costs from other responsible parties in the wake of the recent Supreme Court decision in Cooper Industries v. Aviall Services, and subsequent cases.
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