The Five-Year Reviews CD set contains full-text copies of five-year review documents that have been prepared for Superfund hazardous waste sites. Sites that require extensive, long-term cleanup are required to have a five-year review documents prepared by EPA to evaluate the implementation and performance of site remedies to determine if they remain protective of human health and the environment. Five-year reviews are required whenever a remedial action results in hazardous substances, pollutants, or contaminants remaining on a site above levels which would allow for unlimited use and unrestricted exposure. Reviews at such sites must be conducted no less than every five years after the initiation of the remedial action, thus the term 'five year reviews'. There are two types of review; policy reviews, explain policy issues related to the site; and statutory reviews, review applicable statutes and compliance. The Five-Year Reviews are now contained on a two CD set. CD No. 1 contains documents for EPA Regions 1 through 4, and CD No. 2 contains documents for EPA Regions 5 through 10. Currently, these CDs contain reviews from FY 1991 through FY 2004, including 83 documents not included on previous releases. Not all reviews from those years are contained on these CDs; however, as additional Five-Year Reviews become available, they will be included on subsequent releases. Both CDs include a User Guide, which contains installation instructions, navigation tips, and instructions for using the full-text search tool. This guide also includes associated references and Web hyperlinks to comprehensive site information on hazardous and potentially hazardous waste sites.