• >99% decrease in groundwater PFAS concentrations
• SourceStop has established a new equilibrium in the treatment zone, reflecting a high degree of controlled PFAS adsorption, with almost no dissolved phase PFAS
• Highly innovative in situ PFAS source remediation approach has potential for widescale application across similarly impacted sites

A textile manufacturing facility in Belgium used per- and polyfluoroalkyl substances (PFAS) in its manufacturing process. Over time, spills and leaks led to the accumulation of PFAS in the shallow soil, which eventually leached into the groundwater, forming a diffuse PFAS plume. SourceStop® – Liquid, a colloidal activated carbon (CAC) technology, was applied to reduce PFAS migration beneath the source area. Over five months of monitoring, total PFAS concentrations in groundwater decreased by more than 99%, offering an effective strategy for eliminating PFAS leaching into groundwater below this and other PFAS source areas.