The Army Corps of Engineers has awarded a contract to clean up PFAS-contaminated soil at Eielson Air Force Base. The chemical used in firefighting foams has been linked to serious health problems. And a longtime Alaska contamination expert is skeptical of the PFAS-cleanup technique that’ll be used at Eielson. The Corps of Engineers awarded the $27.6 million contract to Anchorage-based Brice Engineering on Nov. 10. It calls for the contractor to clean up about 130,000 cubic yards of contaminated soil excavated during construction of eight facilities to accommodate the buildup of F-35 fighter jets at Eielson. That’s enough soil to cover an acre of land about nine feet deep. The contractor will employ a process called “soil washing” that uses water to extract enough of the PFAS to meet the state’s cleanup standard.