PFAS Monitored Retention (PMR) and Enhanced Retention (PER): A Practical Framework for Managing PFAS Groundwater Sites

Webinar Highlights

  • PFAS Monitored Retention (PMR) – A non-destructive extension of monitored natural attenuation in which physical and chemical retention processes are used to protect downgradient receptors
  • Tiered Evaluation Framework – A lines-of-evidence methodology for assessing PMR performance using plume mass discharge and travel time to the nearest receptor
  • PFAS Enhanced Retention (PER) – Active retention strategies for sites where natural attenuation is insufficient, including capping, colloidal activated carbon (CAC) barriers, and emerging technologies
  • Field Validation and Practical Applications – Results from AFFF-impacted sites and a CAC barrier database showing how retention-based approaches can support interim remedies, site prioritization, and long-term site management

In this webinar we were pleased to have special guest speakers Dr. Charles Newell, Vice President at GSI Environmental, and Dr. David Adamson, Vice President and Principal Engineer with GSI Environmental. Their presentation examined PFAS Monitored Retention (PMR), a non-destructive extension of monitored natural attenuation in which physical and chemical retention processes are used to protect downgradient receptors; and PFAS Enhanced Retention (PER), the active companion to PMR for sites where natural retention alone is insufficient. They were joined by Paul Erickson, PhD, Vice President of Research and Development at REGENESIS.

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