In situ treatment reduces lifecycle remediation costs vs. pump & treat


The first known full-scale in situ PFAS treatment worldwide was completed in 2016 at a manufacturing and former firefighting training site in Ontario, Canada, where aqueous film-forming foams (AFFF) were used. Baseline PFAS concentrations in groundwater exceeded several thousand nanograms per liter (ng/L). The site was also impacted by petroleum hydrocarbons, which was the initial impetus for site remediation activities until later characterization revealed PFAS.

PlumeStop was injected into the PFAS source zone, and within the first sampling event (three months post-application), concentrations were reduced to non-detect levels, with reductions maintained for six years thus far. An independent fate and transport modeling expert predicts that PlumeStop will halt PFAS migration out of the treatment zone for more than 60 years, preventing exposure risk and reducing liabilities for the site owner.

Read the Case Study

This case study features the following:

  • A single-injection of PlumeStop successfully immobilized TPH, PFOS, and PFOA in a source area and a down-gradient plume
  • Eliminated future risk to public health as groundwater contaminants were contained, eliminating route of exposure
  • Modeling indicates that PFOS and PFOA should remain contained within the source zone for decades with a single injection