Relative Risk Site Evaluation Biddle Air National Guard Base Horsham, Pennsylvania

  • Published

Public Notice

Relative Risk Site Evaluation

Biddle Air National Guard Base

Horsham, Pennsylvania

The Air Force completed the Relative Risk Site Evaluation (RRSE) for the Biddle Air National Guard Base (ANGB), located in Horsham, Pennsylvania, to support sequencing of environmental restoration work. When the term "Air Force" is used in this public notice, it includes the Air National Guard. 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) are evaluated during the RRSE process to sequence sites for Remedial Investigation. Due to discovery of per- and polyfluoroalkyl substances (PFAS), which includes perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and perfluorobutane sulfonic acid (PFBS), a RRSE was completed for the sites at this installation. 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.

This RRSE fact sheet with individual site summaries is issued in accordance with the Department of Defense (DoD) Environmental Restoration Program (ERP) and is available for public review for 30 days as of this notice. The public comment period for Biddle ANGB will be from December 22, 2021 - January 22, 2022. At Biddle ANGB, twelve restoration sites were evaluated in the current RRSE. The Overall Site Category scores were twelve “High” and zero “Medium” or “Low” categories. Additional information on the RRSE framework and the scoring process for the sites is included in the RRSE which can be found at the Biddle ANGB website (Environmental Tab) located at the following link: (Document for review and comment is Biddle_Horsham_RRSE Fact Sheet for Public Comment.pdf)

For more information or to submit written comments, please contact Bill Myer at 3501 Fetchet Avenue, Joint Base Andrews, MD, 20762-5157, (240) 612-8473, or