The Formerly Utilized Sites Remedial Action Program (FUSRAP) is an environmental remediation program. The FUSRAP team devotes itself to finding and remediating radiological contamination generated by activities of the Manhattan Engineer District and the Atomic Energy Commission (MED/AEC) during development of the atomic weapons in the 1940s and 1950s.
After MED/AEC activities ceased, uranium-processing sites were decontaminated according to the standards of the day. However, today's cleanup standards are much more stringent, requiring additional cleanup. During its sampling activities, the FUSRAP team tests for FUSRAP contaminants of concern (COCs) per the Record of Decision (ROD) for the North St. Louis County Sites, but it doesn't test for other, unrelated (non-FUSRAP) contaminants that may be present.