Division of Energy Employees Occupational Illness Compensation (DEEOIC)

The Site Exposure Matrices (SEM) website has been updated! This update makes the website current through May 16, 2025. New information is now available for eight U.S. Department of Energy (DOE) sites, including significant additions to four of these sites, including the Brookhaven National Laboratory; Mound Plant; Trinity Nuclear Explosion Site; and Y-12 Plant.

Security guard profiles pose a unique challenge for identifying the site-specific exposures that occur based on the location of the guard. An enhanced approach for updating security guard profiles was developed and implemented at the request of the U.S. Department of Labor (DOL). This enhanced methodology to collect and evaluate documents to include more site-specific information to the Security Guard family of labor categories is being implemented as site profiles are updated and was applied to some of the site updates included in this release. A Generic profile was also developed to better identify potential toxic exposures involved in the process for drilling and monitoring wells at DOE sites which was also applied in some of these updated site profiles. An enhanced approach for updating Engineer profiles was developed and implemented to identify potential toxic exposures. The significant changes involved in this release include:

  • Brookhaven National Laboratory – Added information from the Well Drilling profile. Added generic Guard toxins. Added five radiological toxins to Health Physics Technician.
  • Mound Plant – Updated engineering labor categories information using the new approach. Added generic Guard toxins.
  • Trinity Nuclear Explosion Site – Added Well Drilling profiles. Added labor categories from new sources. Reworked substance exposures for explosion tests.
  • Y-12 Plant – Added Well Drilling profiles.

DOL received ten Internet Accessible SEM (IAS) website public submittals related to five toxic substances and five disease inputs since the last update on November 16, 2024. None of the ten IAS submittals resulted in SEM profile revisions.

Since the SEM first became available to the public in March 2010, there have been 29 revisions of the SEM website. Prior to the release of each new version, DOE reviews the new and revised information to ensure that no classification issues exist.