ADDENDUM TO THE METHODOLOGY FOR ASSESSING HEALTH RISKS ASSOCIATED WITH INDIRECT EXPOSURE TO COMBUSTOR EMISSIONS

Abstract

In response to increasing concerns over the potential impacts of emissions from combustion devices through indirect exposure routes, the U.S. EPA formed a multidisciplinary working group to review and update Agency guidance on conducting indirect exposure assessments. The approach used by the working group was to review the 1990 document, Methodology for Assessing Health Risks Associated with Indirect Exposure to Combustor Emissions (EPA/600/6-90/003), and to identify and resolve issues. The working group concluded that this 1990 document was fundamentally sound, although specific issues were identified. The working group wrote the draft Addendum, and it is crafted to be used along with the 1990 document. This draft addendum is formatted following this approach. After each issue is presented, this addendum then describes the working group's conclusions and recommendations. The working group was divided into three subgroups to deal with specific technical issues, as follows: 1) modeling emissions, air dispersion, and deposition; 2) food chain modeling, including fate and transport model methodology and input parameters; and 3) human exposure and contact rates. Two sections of the 1990 document, Air Dispersion and Deposition of Emitted Pollutants, and Surface Water, were rewritten.

Citation

U.S. EPA. ADDENDUM TO THE METHODOLOGY FOR ASSESSING HEALTH RISKS ASSOCIATED WITH INDIRECT EXPOSURE TO COMBUSTOR EMISSIONS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/AP-93/003 (NTIS PB94136306).

• ADDENDUM TO THE METHODOLOGY FOR ASSESSING HEALTH RISKS ASSOCIATED WITH INDIRECT EXPOSURE TO COMBUSTOR EMISSIONS