Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title A Tiered modeling approach for assessing the risks due to sources of hazardous air pollutants /
Author Guinnup, David E.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U.S. Environmental Protection Agency,
Year Published 1992
Report Number EPA/450-4-92-001
Stock Number PB92-164748
OCLC Number 25621770
Subjects Air--Pollution.
Additional Subjects Air pollution control ; Computerized simulation ; Risk assessment ; Environmental health ; Atmospheric diffusion ; Air pollution effects(Humans) ; Ecology ; Clean Air Act ; Pollution sources ; Hazardous materials ; Toxicity ; Malignant neoplasms ; Air quality dispersion models ; Toxic substances ; Stationary sources ; Mathematical models ; Exposure
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  EPA-450/4-92-001 Region 1 Library/Boston,MA 09/14/2009
EJBD ARCHIVE EPA 450-4-92-001 Headquarters Library/Washington,DC 06/12/2013
EKBD  EPA-450/4-92-001 Research Triangle Park Library/RTP, NC 11/21/2003
ESAD  EPA 450-4-92-001 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB92-164748 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation vi, 43 pages
The document provides modeling guidance to support risk assessments as applied to stationary sources of hazardous air pollutants. The guidance focuses on procedures which may be used in support of the petition processes described in Title III of the Clean Air Act Amendments of 1990. The analysis approach described herein is a tiered one, in which each subsequent modeling tier requires additional site-specific information to produce a less conservative estimate of the risk associated with a given stationary source (or group of sources). The modeling approach begins with Tier 1 screening tables which require only source emission rates, stack heights, and nearest fenceline distances to estimate maximum cancer and/or noncancer risks. Tier 2 utilizes additional source parameters (including stack diameter, exit gas temperature and velocity, and nearby building dimensions) with the SCREEN computer program to develop more refined estimates of maximum risks. Tier 3 utilizes site-specific meteorological data, plant layout information, and release frequency data with the TOXST and TOXLT computer models to provide additional refinement to these assessments.
"Office of Air Quality Planning and Standards." "EPA/450-4-92-001." "March 1992."