In September 2020, HGL was awarded a 5-year multimillion dollar task order to complete a PFAS Remedial Investigation (RI) at Offutt Air Force Base (AFB), Nebraska, with options to complete RIs at Cavalier Air Force Station and Minot AFB, North Dakota, and McConnell AFB, Kansas. The work is being performed for the Air Force Civil Engineer Center (AFCEC) through the U.S. Army Corps of Engineers, Omaha District.
The purpose of the RIs is to 1) delineate the horizontal and vertical extent of PFAS contamination in soil, groundwater, surface water, and sediment, 2) determine the source strength of PFAS contamination in soil within the unsaturated source zone, 3) identify potential exposure pathways, 4) update or develop a robust conceptual site model, and 5) recommend sampling requirements for follow-on investigation efforts.
This award supplements the more than 150 PFAS investigations and response actions that HGL has performed at U.S. Department of Defense, U.S. Environmental Protection Agency (EPA), and commercial sites across the country. These projects include RIs, Preliminary Assessments, Off-Base Site Inspections, Drinking Water Protection Studies, PFAS Data Tracking and Technical Support, Engineering Evaluation/Cost Analyses (EE/CAs), Non-Time Critical Action Memoranda (NTCAM), and drinking water mitigation projects. PFAS compounds are a complex family of more than 4,000 manufactured fluorinated organic chemicals present in diverse products such as fire-fighting foams, cookware, and fabric treatments that have been generating particular interest and concern in the United States and abroad.