Sammendrag
The Norwegian Environment Agency has described the purpose of review/study follows: It
should be investigated which PAH components or PAH groups in contaminated sediments that
are best suited to assess the need for remedial measures.
In Norway limit values (marginal values/quality standards) are developed for a total of 16 PAH
compounds in sediment and water. The limit values are based on knowledge of the toxicity of
individual compounds, and acceptable exposure in the environment. In addition to the limit
values for individual compounds, Norwegian environmental authorities operate with limit
values for SUM PAH-16 in sediment. These limit values are based on excess concentrations
(relative to background) and not ecotoxicological data. Risk assessment of PAH-contaminated
sediments is done using all individual PAH components. However, SUM PAH-16 is used to
assess the need for remedial actions in PAH-contaminated sediments. The purpose of this
review/study has been to provide alternatives to SUM PAH 16 in the assessment of need for
remedial measures in PAH-contaminated sediments, either using individual PAH-components
or appropriate groups of PAHs. To this end, important criteria have been the risk for human
health, risk of ecological effects or practical considerations with regard to “Vannforskriften”
(Norwegian law on water).
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