Citation:

HALL, ERICS. AIR TOXICS MODELING RESEARCH PROGRAM: AN OVERVIEW. Presented at EPA Region III Air Toxic Summit, Philadelphia, PA, October 18 - 20, 2005.

Impact/Purpose:

The primary objectives for this task are:

to assess the contribution of outdoor sources to total personal exposures for high priority air toxics and components of particulate matter (PM),

to identify the important microenvironments and human activities contributing to high exposures for these pollutants, and

to evaluate and refine model algorithms and inputs by incorporating new approaches and data, and modularizing model algorithms for application to multiple air pollutants (particles/gases).

Description:

This product is a Microsoft Powerpoint slide presentation which was given at the joint EPA Region 3 - Mid-Atlantic Regional Air Management Association (MARAMA) Air Toxic Summit in Philadelphia, Pennsylvania held from October 18, 2005 through October 20, 2005. The slide presentation gave an overview of air toxics (computer) models used to assess population exposures to various hazardous air pollutants. A short history of exposure models was given that introduced the key features that exist in the current generation of exposure models. An overview of the Stochastic Human Exposure and Dose Simulation (SHEDS) model was presented. The SHEDS Model has four variants (Air Toxics, Particulate Matter [PM], Pesticides, Wood). Each variant of SHEDS is used to determine the variability and uncertainty associated with human exposure to hazardous substances. The SHEDS models take into account the major pathways of exposure (dietary ingestion, non-dietary ingestion, inhalation and dermal contact) along with the locations and activities of people as they are being exposed to various substances. The Consolidated Human Activity Database (CHAD) inputs human physiological and activity/location information into the SHEDS models to give realistic exposure and dose profiles for individuals and population groups."

Record Details: