This is a final report by the Office of Inspector General (OIG) of the U.S. Environmental Protection Agency (EPA). We conducted the assignment based on a requirement from the House and Senate Committees on Appropriations. The committees required the OIG to report on EPA's implementation of OIG recommendations, as well as current efforts, to strengthen Superfund contracting controls to prevent waste, fraud, and abuse. We do not make any recommendations in this report, and you are not required to respond to this report.