Click on the links below to view the Circulars
- 19-01 Sandia National Laboratories Special Exposure Cohort (SEC) Class from January 1, 1995 through December 31, 1996
- 19-02 Y-12 Plant Special Exposure Cohort (SEC) Class from January 1, 1958 through December 31, 1976
- 19-04 Idaho National Laboratory (INL) Special Exposure Cohort(SEC) Class between January 1, 1963 and February 28, 1970