Welcome to the Intermountain Section AWWA’s 2021 Annual Conference
Back To Schedule
Thursday, October 10 • 12:00pm - 12:30pm
PFAS Water Treatment Study: Comparison of GAC to Single-Pass Ion Exchange

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

Per- and polyfluoroalkyl substances (PFAS, emerging contaminants of concern) have been detected in the water of multiple culinary water supply wells serving a confidential client. The wells are down gradient of a regional airport, where aqueous film forming foam (AFFF) containing PFAS was used in firefighting exercises. In 2017, the Minnesota Department of Health (MDH) issued new health based guidance values for PFAS that were lower than levels in many of the supply wells. The client has proactively blended water from several wells to supply water that is compliant with the new guidance while actively pursuing options to address PFAS in the water supply.

Steps taken to secure a PFAS free supply for the near and long term, include completing a water treatment study for PFAS that compared three different treatment media. The test included an accelerated column test (ACT) with granular activated carbon (GAC) and a single-pass ion exchange pilot test that simultaneously evaluated two different ion exchange (IX) resins. The data collected resulted in the ability to compare the three different types of treatment media and their effectiveness in removal of PFAS from drinking water. This presentation will provide detailed results of the ACT and pilot test.


Katie Wolohan

Environmental Engineer (PE), Barr Engineering Company
Katie Wolohan has more than seven years of environmental consulting experience and assists clients with industrial and municipal water and wastewater treatment, water reuse, and environmental compliance and permitting. She has assisted with the evaluation, design, and implementation... Read More →

Thursday October 10, 2019 12:00pm - 12:30pm MDT
Boiler Room