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DESIGN/BUILD OF AN EMERGENCY GRANULAR-ACTIVATED CARBON SYSTEM TO REMOVE PERFLUOROCARBONS FROM DRINKING WATER, WRIGHT-PATTERSON AIR FORCE BASE, OH
Scoville, B., T. Bashore, and J. Frehse.
Florida Remediation Conference 2018, 5-6 December [Abstract only] 2018

When PFOS and PFOA were detected in two drinking water wells on Wright-Patterson Air Force Base, the existing groundwater treatment process was modified under a rapid response contract issued by the U.S. Army Corps of Engineers-Omaha District to meet the U.S. EPA health advisory standard of 70 ppt of PFOS, PFOA, or their combined concentration. The design phase included evaluating alternatives to address the increased back pressure generated by adding GAC vessels; assessing treatment system location options based on ease of line access, available footprint, and truck access to deliver GAC during change-outs; and conducting rapid column tests using the proposed GAC to demonstrate the removal effectiveness of the proposed system. Following construction performed from January through May in 2017, system startup took place in June 2017. By July 1, 2018, the system had treated more than 325 million gals with no sign of breakthrough and no need for backflushing. The low-maintenance design requires <8 hr/wk of operational support. Vessel pressures and flow rates are continuously monitored via a process logic control system tied into the drinking water plant's control system for emergency shutdown. Additional information at https://pfasproject.com/wright-patterson-air-force-base-dayton-ohio/.



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