FATE AND EXPOSURE MODELS IN RELATION TO RISK ASSESSMENT - DEVELOPMENTS AND VALIDATION CRITERIA

The recognition of potential long-term effects of substances, has led to the development of regulations and legislation which emphasis the n eed for assessing the risks posed by both new and existing substances for man and the environment. The evaluation of fate and exposure model s is put into perspective in relation to the developments over the las t five years in the framework of the EU regulations and national legis lation within the European Community. The validation of environmental exposure models (multi-media models) is described in the context of qu ality assurance of models available to a user group, which is differen t from the quality assurance aspects for a developers group.