In this webinar we were pleased to have as a special guest speaker, globally-recognized PFAS modeling expert and recent lead author of the REMEDIATION Journal article titled Longevity of colloidal activated carbon for in situ PFAS remediation at AFFF-contaminated airport sites, Grant Carey, PhD, President of Porewater Solutions. His presentation will discuss modeling PlumeStop® longevity at AFFF-impacted military and airport sites. He was joined by Scott Wilson, President & CEO of REGENESIS, who provided an update on the use of colloidal activated carbon as a sustainable, low-cost method to eliminate PFAS risk and liability.
Highlights of this free webinar:
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Case studies of 17 PFAS field sites showing successful PlumeStop performance results for up to six years and counting
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In-Situ Remediation Model (ISR-MT3DMS) indicates PlumeStop longevity that may occur at a wide range of AFFF-impacted military and airport sites
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Remedial alternatives that may be used in combination with PlumeStop at AFFF-impacted sites will be discussed
There is growing interest in the use of PlumeStop to sequester PFAS in groundwater sorption zones. PlumeStop contains colloidal activated carbon (CAC) particles which are sufficiently small to allow for easy injection into porous media. The performance of PlumeStop at 17 PFAS field sites is summarized, including upgradient concentrations of PFAS, organic co-contaminants, and native organic matter; and the fraction of CAC in soil after injection. These case studies demonstrate that PlumeStop has been used successfully at PFAS field sites with total monitoring periods to-date ranging from 0.3 to six years.
A review of state and federal guidance indicates that the four most frequent PFAS of interest are PFOS, PFOA, PFHxS, and PFNA. A sensitivity analysis using the In-Situ Remediation Model (ISR-MT3DMS) illustrates the magnitude of PlumeStop longevity that may occur at a wide range of AFFF-impacted military and airport sites. A statistical analysis of PFAS concentrations at 96 AFFF-impacted sites and laboratory batch tests supported this modeling study. Various influencing factors were modeled, including plume concentrations, groundwater velocity, the engineered fraction of CAC in soil, and sorption isotherm properties. Remedial alternatives that may be used in combination with PlumeStop at AFFF-impacted sites are discussed.
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About the Presenters:
Grant Carey, Ph.D.
President, Porewater Solutions
Dr. Grant Carey is President of Porewater Solutions, and is expert in mathematical modeling, environmental forensics, chemical transport processes, and site remediation. Grant works on both litigation and regulatory projects throughout North America. Grant has a Ph.D. in Civil Engineering from the University of Guelph, and he has developed industry-leading modeling and visualization software for improving conceptual site models, helping non-technical audiences to understand complex sites, and designing more effective remediation systems. Grant is an Adjunct Research Professor in the Department of Civil and Environmental Engineering at Carleton University, and is involved in SERDP and NSERC Alliance research projects focusing on PFAS competitive sorption and remediation, and colloidal activated carbon transport.
Scott Wilson
President & CEO, REGENESIS
Scott Wilson has extensive experience in the development and application of advanced technologies for groundwater and soil restoration and vapor intrusion mitigation. He is a widely published expert with over 30 years’ experience designing, installing and operating a broad range of remediation technologies. Mr. Wilson has expertise in project management and has directed the successful completion of large industrial remediation programs under State and Federal regulatory frameworks. At REGENESIS, on specific projects, he plays an active role in technical oversight and program management to ensure conformance with customer expectations. Mr. Wilson received a M.S. from the University of Texas at El Paso, a B.A. from the University of San Diego and an M.B.A. from the Kellogg School of Management at Northwestern University.