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Contaminated Sediments

Review of Solutions for Protecting Aquatic Environments

image of Contaminated Sediments

The Nordic Council of Ministers have recognized the need to compile the knowledge of sediment remediation strategies and to evaluate different remediation approaches. The objective of this report is to give a status of regulatory framework and sediment management within selected Nordic countries (Norway, Sweden, Finland and Denmark). In addition, the report gives a short overview of international knowledge on remediation approaches, techniques, and materials. Governance and regulatory instruments in dealing with contaminated sediments vary between countries. Of the countries presented, only Norwegian environmental authorities have implemented a national strategy for remediation of marine contaminated sediments. A Nordic database of clean-up projects and long-term monitoring would improve the exchange of knowledge between the Nordic countries.

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Experience gained from selected Nordic clean-up projects

In Norway, the first sediment clean-up project was the in situ capping of Eitrheimsvågen in Odda carried out in 1992. During the period 2001/2002, five pilot projects were performed in Tromsø, Trondheim, Sandefjord, Kristiansand and Horten. Several full-scale projects have been subsequently conducted. One of the main knowledge needs identified was related to long term monitoring of remediation, to assess the efficiency of the remediation action and the potential recontamination. In Sweden, some clean-up projects have been reported. Reference projects involve mostly dredging and disposal, but also some capping projects. In Finland, only minor remediation actions have been motivated by clean-up, whereas several projects have been motivated by infrastructure developments.

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