Record Display for the EPA National Library Catalog

RECORD NUMBER: 7 OF 13

OLS Field Name OLS Field Data
Main Title Methods for Estimating On-Site Ambient Air Concentrations at Disposal Sites.
Author Hwang, S. T. ;
CORP Author Environmental Protection Agency, Washington, DC. Office of Health and Environmental Assessment.
Year Published 1987
Report Number EPA/600/J-87/109;
Stock Number PB88-132907
Additional Subjects Waste disposal ; Hazardous wastes ; Air pollution ; Dispersions ; Emission ; Respiration ; Toxicity ; Contamination ; Normal density functions ; Estimating ; Environmental engineering ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB88-132907 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 7p
Abstract
Currently, Gaussian type dispersion modeling and point source approximation are combined to estimate the ambient air concentrations of pollutants dispersed downwind of an areawide emission source, using the approach of virtual point source approximation. The Gaussian dispersion modeling becomes less accurate as the receptor comes closer to the source, and becomes inapplicable for the estimation of on-site ambient air concentrations at disposal sites. Partial differential equations are solved with appropriate boundary conditions for use in estimating the on-site concentrations in the ambient air impacted by emissions from an area source such as land disposal sites. Two variations of solution techniques are presented, and their predictions are compared.