Dr. Shangtao Liang, right, electrochemical oxidation subject matter expert and principal investigator, AECOM, describes the DE-FLUOROTM process to George Walters, supervisory environmental engineer, Air Force Civil Engineer Center, at Wright-Patterson Air Force Base, Ohio on Sept. 29, 2020. DE-FLUOROTM electrochemical oxidation is the final step to remediate per- and polyfluoroalkyl substances (PFAS) from groundwater near the base fire training area. This project is the first field demonstration using the electrochemical oxidation technology for PFAS destruction. PFAS is a group of chemicals, some of which were formerly used in aircraft fire fighting foam. (U.S. Air Force photo by Ty Greenlees)