An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Radiation Protection

MARSSIM Workgroup Materials

multi-agency workgroupThe Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) Workgroup is an ongoing, collaborative effort to bring consistency to the methods and processes used to demonstrate compliance with federal and state radiation regulations. Workgroup members represent four federal agencies that have the primary responsibility for managing radioactive materials: the Environmental Protection Agency, the Department of Energy, the Department of Defense and the Nuclear Regulatory Commission.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
  • MARSSIM Workgroup Charter (PDF)(5 pp, 1 MB)
    This charter allows for the continuance of the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) Workgroup and describes the mission, scope, vision, values and processes for the Workgroup's activities and products.
  • MARSSIM Workgroup Contact Information (PDF)(3 pp, 392 K)
    This contact list provides the most up to date contact information for MARSSIM Workgroup members.