U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

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Hinrichsen, H. | CRC Care International Cleanup Conference, 8-12 September, Adelaide, Australia, 18 slides, 2019

Full-scale PFAS remediation was undertaken at a former metal plating site near Hasselholm, Sweden, that contained ~3,000 tonnes of contaminated soil that no local landfill would accept. As a result, an innovative solution that involved stabilizing the soil before disposal to reduce the risk of leaching. Preliminary lab trials led to the selection of full-scale treatment, which was completed by mixing the soil with a chemical adsorbent stabilization product (3% and 5% addition rate) in the field using a Trommel screen, water truck, and a conventional loader. Two composite validation soil samples were collected from the field after treatment and sent out for leachate analysis. Results showed that the PFOS and PFHxS concentrations in soil leachate after treatment were sufficiently low to allow safe disposal to a local waste management landfill. About 3,000 tonnes of soil was treated and disposed of. The reduction in total PFAS concentrations in soil leachates after treatment ranged from 86% to 99.5%. This was the first successful full-scale stabilization of PFAS-contaminated soil in Sweden of this size.

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