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This article published in Wiley's Remediation Journal reviews a case study of in-situ treatment of TCE and PFAS in groundwater at an industrial site within a silty sand aquifer. Using a combination of adsorption, biotic, and abiotic degradation in-situ remedial approaches, the chemicals of concern were targeted for removal from the groundwater with adsorption being utilized for PFAS whereas adsorption, chemical reduction, and anaerobic biodegradation were used for the chlorinated ethenes.

Highlights of the results documented in this research article:

  • Sampling of the groundwater over a 24‐month period indicated that the detected PFAS were treated to either their detection, or below the analytical detection limit over the monitoring period
  • Post injection results for TCE, cis‐1,2‐DCE, and vinyl chloride indicated that the concentrations of the three compounds decreased by an order of magnitude within 4 months of injection, with TCE decreasing to below the analytical detection limit over the 24‐month monitoring period
  • Analyses of Dehalococcoides sp., ethene, and acetylene over time suggest that microbiological and reductive dechlorination were occurring in conjunction with adsorption to attenuate the chlorinated ethenes and PFAS within the aquifer

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About the Environmental Consultant/Author:

Rick McGregor is the President of InSitu Remediation Services Ltd Rick McGregor
President, InSitu Remediation Services Ltd
Rick McGregor is the President of InSitu Remediation Services Ltd and has over 26 years’ experience in groundwater and soil assessment and remediation. Rick has worked in over 30 countries and has authored numerous papers on groundwater assessment and remediation. Rick holds a M.Sc. from the University of Waterloo in hydrogeology and geochemistry and is a Certified Ground Water Professional in Canada and the United States.

About InSitu Remediation Services Ltd:

Rick McGregor is the President of InSitu Remediation Services Ltd One of Canada’s most experienced remediation companies, InSitu Remediation Services Ltd. (IRSL) has designed, implemented, and maintained soil and groundwater remediation programs in diverse geological environments in North, Central, and South America, Europe and the Middle East.