A REVIEW OF MODELS FOR ESTIMATING TERRESTRIAL ECOLOGICAL RECEPTOR EXPOSURE TO CHEMICAL CONTAMINANTS

In instances where empirical measurements are not practicable, ecological risk assessments may rely on site-specific exposure models for estimating uptake of chemical contaminants. This paper presents, based on a review of the literature, a compilation of relatively simple quantitative models that can be combined to produce site- and species-specific first-order estimates of uptake of chemicals from abiotic media. These models have proved useful in providing order-of-magnitude estimates for screening and sample program design purposes. This paper is intended as both a practical guide for choosing models to estimate terrestrial wildlife exposures and as a step toward development of a more comprehensive and standard approach to exposure assessment in terrestrial ecological receptors.