Immediate and sustained PFAS risk reduction: The PlumeStop barrier achieved average PFAS 6 reductions of 97%, with concentrations driven to near or below detection limits in downgradient wells—effectively stopping off‑site plume migration and protecting public water supplies.

Lower lifecycle cost compared to conventional treatment: The in situ barrier approach provided a strategic alternative to expanded pump‑and‑treat, avoiding capital investments that could reach hundreds of millions of dollars while reducing long‑term operational expenses.

Proven, scalable in situ solution for complex sites: A phased design—validated through pilot testing and optimized during field implementation—enabled reliable treatment across shallow, intermediate, and deep zones, demonstrating how PlumeStop can deliver facility‑wide PFAS plume control in sensitive hydrogeologic settings.

At a former fire training facility in Barnstable County, Massachusetts, legacy AFFF use created a persistent PFAS plume that threatened nearby public water supply resources within a sensitive sole‑source aquifer. After years of interim measures failed to fully control downgradient migration, a phased PlumeStop® colloidal activated carbon permeable adsorptive barrier was implemented to provide long‑term plume control. Pilot testing and full‑scale installation demonstrated rapid, consistent PFAS reduction across multiple depths—delivering a cost‑effective, zero‑waste alternative to expanding pump‑and‑treat operations while protecting critical groundwater resources.

This site received the 2026 NGWA Outstanding Groundwater Remediation Project Award. Read the article or press release to learn more.