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Public comment period opens for Relative Risk Site Evaluation for PFOS/PFOA

  • Published
  • 375th Air Mobility Wing Public Affairs

The Air Force completed the Relative Risk Site Evaluation (RRSE) for Scott AFB to support sequencing of environmental restoration work. The RRSE process is used to evaluate the relative risk posed by an environmental restoration site in relation to other sites.

Restoration sites in Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) phases prior to remedy-in-place are evaluated in the process. Due to discovery of PFOS/PFOA, a RRSE was completed for the sites. Relative risk is not the sole factor in determining the sequence of environmental restoration work, but it is an important consideration in the priority setting process.

At Scott AFB, 6 restoration sites were evaluated in the process. The Overall Site Category scores were 4 High, 1 Medium, and 1 Low.

This Relative Risk Site Evaluation is issued in accordance with the DoD Defense Environmental Restoration Program and is available for public review for 30 days as of this notice. This RRSE can be found at AFCEC CERCLA Administrative Record (AR):   Scroll to the bottom of the page and click on “Continue to site”, then select “Active Duty,”, scroll down the Installation List and click on “Scott AFB, IL”, then enter 2061 in the “AR #” field. Then click “Search” at the bottom of the page. Click on the spy glass to view the document.

For more information or to submit written comments, please contact us by phone at 618-256-2125 or email at