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Main Title Evaluation of ambient species profiles, ambient versus modeled NMHC : NOx and CO: NOx ratios, and source-receptor analyses /
Author Yarwood, Greg. ; Gray, H. A. ; Ligocki, M. P. ; Whitten, G. Z.
Other Authors
Author Title of a Work
Gray, H. Andrew.
Ligocki, Mary P.
Whitten, Gary Z.
CORP Author Systems Applications International, San Rafael, CA.;Environmental Protection Agency, Ann Arbor, MI. Office of Mobile Sources.
Publisher U.S. Environmental Protection Agency, Office of Mobile Sources,
Year Published 1994
Report Number SYSAPP94--94/081; SYSAPP-94/081; EPA-68-C1-0059; EPA/420/R-94/005
Stock Number PB95-138764
OCLC Number 742598628
Subjects Air quality management--United States--States ; Air--Pollution--United States ; Air--Pollution--United States--Measurement ; Organic compounds ; Hydrocarbons--Analysis ; Air--Pollution--Measurement ; Air quality management--US states
Additional Subjects Air quality ; Air pollution standards ; Mathematical models ; Emission factors ; Exhaust emissions ; Motor vehicles ; Automobile exhaust ; Nitrogen oxides ; Carbon monoxide ; Ozone ; Organic compounds ; Non-methane organic compounds ; MOBILE5 computer program
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA 420-R-94-005 NVFEL Library/Ann Arbor, MI 08/03/2011
NTIS  PB95-138764 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 volume (various pagings) ; 28 cm
The current regulatory approach to achieving ozone and related air quality standards is based on emissions estimation and modeling. In recent years, several studies have attempted to evaluate the emissions estimates and methods against ambient measurements by comparing non-methane organic compound (NMOC) species profiles, NMOC:NOx ratios, CO:NOx ratios, and using receptor modeling of NMOCs. Areas of interest have included the relative contributions of mobile, stationary, and biogenic sources, and evidence for underestimation of sources and/or missing sources. However, over the same time period the emission estimates have also been revised to reflect the latest information.
Includes bibliographical references. Final report. "SYSAPP94--94/081." "September 1994." "Prepared for Natalie Dobie." "Contract 68-C1-0059, Work Assignment 2-03."