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(178) Bioaccumulation: Sediment Test Using Benthic Oligochaetes - Aspects of Implementation of a New Guideline. Egeler, Philipp1, Römbke, Jörg1, Knacker, Thomas1, 1 ABSTRACT- Within the framework of many Environmental Risk Assessment (ERA) procedures, the measurement of bioaccumulation is required under certain circumstances. Lipophilic chemicals with a log Kow higher than 3 are usually considered liable to bioaccumulate in biota. In such cases an experimental determination of bioaccumulation may be deemed necessary. OECD guideline 305 describing measurement of bioaccumulation of chemicals from water in fish, is currently the only internationally adopted bioaccumulation guideline. Methods for other than pelagic organisms have not been approved yet. Considering the need for reliable techniques for assessing the risks of exposure to these sediment-associating chemicals, a standardisable test method to measure bioaccumulation of organic chemicals from spiked sediment was developed on behalf of the German Federal Environmental Agency, Berlin, Germany. Based on this method, and taking into account existing guidelines, a draft guideline according to OECD format was formulated. This draft guideline was discussed by international experts from industry, academia and gov-ernmental agencies at a workshop held in Hochheim/Main, Germany, in April 1999. Objective of the workshop was to review and refine methodological and scientific aspects of the proposed draft guideline. The proposed method was accepted in general. Recommendations regarding scope and application of the test, test species, and test performance were given and incorporated in a revised version of the draft guideline. The organisation of an international ring test, and further steps for the draft test guideline to be implemented in international guideline programs were considered. In this contribution, the results of this workshop are summarised. Key words: bioaccumulation, sediment, aquatic oligochaetes, test guideline |
