This CD-ROM contains a comprehensive listing (site identification, party name and address) of all parties who have been identified by the Environmental Protection Agency (EPA) as being liable under CERLCLA. The parties have been identified as being potentially responsible either by general notice letter, special notice letter, or as signatories to a settlement with EPA and/or the Department of Justice (DOJ) under section 106 and 107 (a) of CERCLA. General Notice Letters - GNLs designates an entity as a PRP. These letters are preliminary determinations of potential liability, as opposed to absolute determination of liability. Special Notice Letters - SNLs is a more definitive determination of liability, and begins the moratorium period for negotiations between the EPA and the noticed parties. Following negotiations, settlement may be reached between EPA and PRPs through a number of different mechanisms. These settlements may be administrative or judicial. Administrative settlements are in an administrative order on consent (AOC), a unilateral administrative order (UAO), or a consent agreement (CA). Judicial settlements are in the form of consent decrees or judgments. Consent decrees are negotiated by EPA and PRPs, referred to DOJ, and lodged with the Federal Court by DOJ, and entered into effectiveness by the court. Judgments are rendered following litigation by EPA and DOJ against recalcitrant or uncooperative PRPs. The EPA oversees the implementation and enforcement of the provisions of the settlements or judgments. In the Superfund program, the settlement usually requires payment from the PRPs of a monetary sum to be used for the cleanup of the contaminated site, or agreement to perform the cleanup.