An Overview of Exposure Assessment Models Used by the US Environmental Protection Agency

Abstract

Models are often used in addition to or in lieu of monitoring data to estimate environmental concentrations and exposures for use in risk assessments or epidemio­ logical studies, and to support regulatory standards and voluntary programmes (Jayjock et al., 2007; US EPA, 1989, 1992). The purpose of this chapter is to provide an overview of 35 models currently supported and used by the US EPA to assess exposures to human or ecological receptors (see Table 3.1 for a list of abbreviations). These models differ in regard to their purpose, and level and scope of analysis. For example, some of the exposure assessment models refer to a single pollutant or exposure pathway, while others assess multiple pollutants and pathways. Additionally, most of these models pertain to either human or ecological receptors, although a few are applicable to both receptor groups. These models may target the general popu­ lation, subgroups within the population, or individuals (e.g., workers, consumers). In regard to temporal and spatial scale, some of these models predict acute, subchronic and/or chronic exposures at the local, urban, regional and/or national level. These models are frequently used by, and have sometimes been developed in collaboration with, researchers and practitioners in academia, consulting, private industry, state and local governments, and internationally. The models included in this chapter can be used during different stages of the exposure assessment process. Specifically, these models represent the first half of the

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Cite this paper

@inproceedings{Williams2009AnOO, title={An Overview of Exposure Assessment Models Used by the US Environmental Protection Agency}, author={Pamela R.D. Williams and Bryan J. Hubbell and Eric Weber and Cathy Fehrenbacher and David Hrdy and Valerie G. Zartarian}, year={2009} }