The Department of Defense's Installation Restoration Program (IRP) was established to: (1) identify and evaluate suspected problems associated with past hazardous waste disposal sites at military bases; and (2) control the migration of hazardous environmental contamination from those sites. Pursuant to a congressional request, GAO made a limited review of the status of IRP work at two military installations, an Air Force base and an Army depot. In studying IRP work at the Air Force base, GAO found that a 1982 report was issued which identified 20 disposal sites as having a potential for contamination migration, and additional work to determine the types and quantities of contamination is ongoing. Further, IRP work at the Army depot identified hazardous waste disposal sites in a 1979 report, and the Army concluded its work at the depot with a 1981 study that addressed the potential for environmental pollution at that installation. However, because state and local environmental regulatory agencies raised questions about that report, the Army resumed some additional IRP work at that base.