Sites with Special Exposure Cohort (SEC) Status:
- Texas City Chemicals, Inc., 1953-1955 (Texas City, Texas) (a/k/a American Oil Co.; Borden, Inc.; Smith-Douglass; Amoco Chemical Company)
- Tyson Valley Powder Farm, 1946-1948 (St. Louis, Missouri)
- University of Rochester Atomic Energy Project, 1943-1971 (Rochester, New York)
- Ventron Corporation, 1942-1948 ( Beverly, Massachusetts)
- Vitro Manufacturing – Canonsburg, 1942-1965 (Canonsburg, Pennsylvania) (a/k/a Vitro Rare Metals Co.)
- Wah Chang, 1971-1972 (Albany, Oregon)
- Westinghouse Atomic Power Development Plant, 1942-1944 (East Pittsburgh, Pennsylvania) (a/k/a East Pittsburgh Plant)
- Westinghouse Electric Corp. – New Jersey, 1942-1949 (Bloomfield, New Jersey) (a/k/a North American Phillips Lighting)
- Winchester Engineering and Analytical Center, 1952-1961 (Winchester, Massachusetts)
- W. R. Grace, 1958-1970 (Erwin, Tennessee) (a/k/a Davison Chemical; Nuclear Fuels Services)
- W.R. Grace and Company,1956-1958 (Curtis Bay, Maryland)
- Y-12 Plant, 1943-1957 (Oak Ridge, Tennessee)