Exposure models for contaminated soil : Examples from 3 countries

University essay from Linnéuniversitetet/Institutionen för naturvetenskap, NV

Abstract: Exposure assessments can be made for contaminated soil to get information about how the human health may be affected. They are used in many different countries and may differ from each other, either dramatically or minimal. This study was conducted to examine how these differences appear between three countries' exposure assessments. The countries chosen were Sweden, the Netherlands and the United States and the purpose was to see how the difference appears between the structure, parameters, thresholds, calculations, etc. to be abl e to discuss which of the models are perceived to give the best picture of reality. The discussion was focused on the Swedish assessment model. The results show that there are differences between models and that they sometimes refer to the fact that their model is based on other models. Many parameters used, such as body weight, are not justified and there are manyuncertainties associated with the use of these models. The sources they use to justify the parameters and their values are not always relevant and updated. Uncertainty always follows with these kinds of calculations, but some of the uncertain can be reduced, as shown in this study.

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