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The accumulation of soil contaminants in crops, location-specific calculation based on the CSOIL module. Part I Evaluation and suggestions for model development

De accumulatie van de bodem verontreinigende stoffen in gewassen, locatie-specifieke berekening gebaseerd op de CSOIL module. Deel I Evaluatie en suggesties voor model ontwikkeling

Synopsis

In relation tot the decision to undertake remedial action on a site the possibilities are reviewed of location-specific estimations of human exposure by consumption of crops grown on that site. The model CSOIL is used for the calculation of the Dutch intervention values on basis of assessment of potential risks. The plant module of CSOIL (v. 7.1) is used as a basis to develop the aspect of accumulation in plants from potential to actual risk-assessment. According to calculations with CSOIL for about half of the reviewed soil contaminants the total estimated human exposure is based for 80% or more on the consumption of crops from the contaminated area. In this report the main attention is given to the impact of soil parameters on the amounts of soil contaminants in consumed crops and the choice of crops in the model. Alternative models are reviewed. For metals the German UMS model seems to be useful. For organic contaminants the description of the transport of compounds to plant stems and leaves is a weak point in the CSOIL module. This part can possibly be improved for leafy crops by applying the Trapp en Matthiess model. This model is also being used in the EUSES-model (European Uniform System for the Evaluation of Substances), but is not yet validated.
 

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