We introduce basic principles and methods of the health risk assessment of contaminated sites based on oversea advances in the field. Regarding principles, we emphasize the mode and mechanism of ingestion of contaminants and dose-response relationship. As for the assessment methods, we focus on data collection, exposure assessment, toxicity assessment and risk characterization. We have put forward the concepts and estimation of the superposed risk and the total multi-pathway exposure risk for the same subst...
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