In Situ PFAS Remediation Protects Offsite Environment at Airport in Norway

Case study highlights:

• SourceStop® Liquid, a colloidal activated carbon (CAC), was applied as a permeable sorptive barrier to reduce PFAS migration hydraulically.
• The permeable sorptive barrier was designed and implemented downstream of the excavation area to mitigate the ongoing dissolved-phase transport of PFAS during and post-excavation.
• Through nine months of monitoring, the two primary PFAS of concern, PFOA and PFOS, have been reduced by 96% and 98%, respectively, while Total PFAS has been reduced by 94%.

At Haugesund Airport in Norway, Avinor and their environmental consultant COWI implemented a remediation plan to reduce the migration of PFAS (per- and polyfluoroalkyl substances) in groundwater from a fire training ground. An in situ remediation solution was used to minimize the further migration of PFAS in groundwater during and after the source removal measures were completed.