The Port of Gothenburg is building a new freight terminal at the outer port area at Hisingen. The terminal, covering 220,000 square metres, will be built using clay spoils from the Göta Älv river, taken up as part of routine dredging to maintain the river depth.
Dredging spoils in the river are contaminated by a variety of substances, including TBT, tributyltin, an environmental toxin that can disrupt hormone levels. Until 2008, it was included as an antibiocide in antifouling paints used on the hulls of ships and boats. To ensure the spoils can be enclosed safely without seeping into the surroundings, exhaustive trials are being conducted.