Record Display for the EPA National Library Catalog


Main Title Simulating Urban Air Toxics Over Continental and Urban Scales.
Author Hutzell, W. T. ; Luecken, D. J. ; Ching, J. K. S. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Publisher 2004
Year Published 2004
Report Number EPA/600/A-04/104 ;NERL-RTP-AMD-04-078;
Stock Number PB2005-100840
Additional Subjects Air quality ; Computer models ; US EPA ; Urban areas ; Computerized simulation ; Predictions ; Photochemistry ; Formaldehyde ; Acetaldehyde ; Benzene ; CMAQ(Community multi-scale air quality model) ; Community multi-scale air quality model ; NATA(National air toxics assessment) ; National air toxics assessment
Library Call Number Additional Info Location Last
NTIS  PB2005-100840 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation one CD-ROM contains 4 page document
The US EPA is seeking to improve its National Air Toxics Assessment (NATA). The work computes risks to human health from Hazardous Air Pollutants (HAPs) listed in the Clean Air Act. An essential step is predicting air concentrations of the Hazardous Air Pollutants (HAPs). Currently, a Gaussian plume model makes the predictions. The model may be accurate for local scale effects on ambient concentrations from emitted HAPs that have short atmospheric lifetimes, slow loss rates and no photochemical production. For HAPs such as formaldehyde, acetaldehyde and benzene, several of the assumptions fail. These compounds contribute a large component of the calculated risk based on previous results from the NATA. EPA can then improve its risk assessments by using a model that better simulates the transport and fate of these compounds. The Community Multi-scale Air Quality model (CMAQ) is one candidate. This abstract describes evaluating a version of CMAQ to support future risk assessments.