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Environ Sci Technol

Title:		"Receptor model comparisons and wind direction analyses of volatile organic compounds and submicrometer particles in an arid, binational, urban air shed"
Author(s):		Mukerjee S; Norris GA; Smith LA; Noble CA; Neas LM; Ozkaynak AH; Gonzales M;
Address:		"National Exposure Research Laboratory, U.S. Environmental Protection Agency, MD E205-02, Research Triangle Park, North Carolina 27711, USA. mukerjee.shaibal@epa.gov"
Journal Title:		Environ Sci Technol
Year:		2004
Volume:		38
Issue:		8
Page Number:		2317 - 2327
DOI:		10.1021/es0304547
ISSN/ISBN:		0013-936X (Print) 0013-936X (Linking)
Abstract:		"The relationship between continuous measurements of volatile organic compounds sources and particle number was evaluated at a Photochemical Assessment Monitoring Station Network (PAMS) site located near the U.S.-Mexico Border in central El Paso, TX. Sources of volatile organic compounds (VOCs) were investigated using the multivariate receptor model UNMIX and the effective variance least squares receptor model known as Chemical Mass Balance (CMB, Version 8.0). As expected from PAMS measurements, overall findings from data screening as well as both receptor models confirmed that mobile sources were the major source of VOCs. Comparison of hourly source contribution estimates (SCEs) from the two receptor models revealed significant differences in motor vehicle exhaust and evaporative gasoline contributions. However, the motor vehicle exhaust contributions were highly correlated with each other. Motor vehicle exhaust was also correlated with the ultrafine and accumulation mode particle count, which suggests that motor vehicle exhaust is a source of these particles at the measurement site. Wind sector analyses were performed using the SCE and pollutant data to assess source location of VOCs, particle count, and criteria pollutants. Results from this study have application to source apportionment studies and mobile source emission control strategies that are ongoing in this air shed"
Keywords:		"Air Pollutants/*analysis Cities Desert Climate *Models, Theoretical Multivariate Analysis Organic Chemicals/analysis Particle Size Vehicle Emissions/*analysis Volatilization *Wind;"
Notes:		"MedlineMukerjee, Shaibal Norris, Gary A Smith, Luther A Noble, Christopher A Neas, Lucas M Ozkaynak, A Haluk Gonzales, Melissa eng Comparative Study Research Support, U.S. Gov't, Non-P.H.S. 2004/05/01 Environ Sci Technol. 2004 Apr 15; 38(8):2317-27. doi: 10.1021/es0304547"