Abstract25th SETAC World Congress 2004

In order to maintain sufficient depth in Dutch seaports, some 30 million cubic meters of material are dregded up and removed each year. Until 2002, the appropriate authorities used the so-called Uniform Content Test (UGT), a chemical oriented test, to assess the suitability of these dredgings for disposal. However, there is a growing need for a suitability test that takes into account new effects, and combined toxic effects of chemicals. As an example, hormone-disrupting effects by TBT have been universally identified. TBT will be included in assessments for this reason.