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In this third-party research article, Rick McGregor of IRSL reviews six pilot-scale in situ field studies of an unconfined sand aquifer impacted by both petroleum hydrocarbons and PFAS. Published in Wiley’s Remediation Journal, this peer-reviewed article determines whether a variety of reagents could be used to attenuate the dissolved PFAS. Six different reagents were injected using direct push technology, consisting of two chemical oxidants and four adsorbents. Performance results gathered downgradient of each of the permeable reactive zones are provided, up to 18-months post application.

Highlights of the results documented in this research article:

  • The only reagent out of the six that reduced PFAS to below detection limits *and* prevented contaminant breakthrough was PlumeStop colloidal activated carbon
  • While contaminant concentrations in zones treated by all the adsorbents were determined to be less than detection limits, all but one – colloidal activated carbon – exhibited partial or complete breakthrough
  • Results indicated that the PFAS contaminants were not treated by the oxidants

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About the 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.