ABSTRACT
Prediction of the possible effects of chemicals in the environment in terms of human health or natural ecosystems is now a major environmental management activity. Some aspects of this are described in Chapter 18. A vital part of these procedures is to evaluate the potential exposure of biota to contaminants. This requires methods to understand and estimate the patterns of distribution in the environment (Mackay, 1991). When a chemical is discharged to the environment, it is necessary to know how much will deposit in soil and sediments and so on.
