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    In-Situ PFAS Remediation Protects Offsite Environment at Airport in Norway

    Case study highlights:

    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 minimise the further migration of PFAS in groundwater during and after the source removal measures were completed.

    • 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%.

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