Remediation works were required at the Söderkaj site, in order to allow the completion of a large housing development project comprising the construction of 330 apartments in an attractive area along the shore of the river Nissan in Halmstad, Sweden. Historical activities at the site, including fisheries, metal plating, dry cleaning and maritime industries, have led to chlorinated solvent contamination in groundwater and PAH and metal contamination in the shallow soils. The hydrogeological conditions for the area are controlled by seasonal variations dependant on precipitation and sea levels.

Monitoring and infiltration tests have shown that the groundwater level in the area is approximately 1‐2m BGL and the soil profile is known to be highly variable to a depth of 7‐9m BGL. Shallow soils contaminated with PAH and metals were excavated and removed. Membrane interface probe (MIP) data was used to delineate both the vertical and lateral extent of the chlorinated solvent contamination at the site. Groundwater contamination was determined to exist between 3 to 6 m BGL.