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Prediction of Fine Particulate Levels at Unmonitored Locations

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Abstract: In November and December of 1999, air concentrations of ultrafine, fine, and coarse particulate matter were measured at two intensive sites in El Paso, Texas. The intensive sites included collocated measurements of NO2 and volatile organic compounds (VOCs) in the air from both continuous and passive samplers. Passive sampling of NO2 and VOCs was also conducted at twenty-two school locations. One of the goals of this study was to attempt to predict the fine and ultrafine particulate concentrations at a total of fifty-five schools, none of which monitored particulates.

To accomplish this, the passive samplers were first compared to the continuous monitors at the two intensive sites. Based on these results, predictive equations for particulate levels were developed as functions of the passive monitor measurements. These predictive equations were then applied at the twenty-two schools with passive monitors. These predicted particulate levels were then utilized to develop predictive equations at the twenty-two schools in terms of certain ancillary variables whose values could be obtained at all school locations.

Finally, predictions were obtained at all school locations by applying these last equations. The ancillary variables were obtained from information supplied by the El Paso school district, the city, the U. S. Census, and from application of GIS techniques to these data. The ancillary variables used were: section of the city, distance to the nearest border crossing, elevation, population density, distance to roads with certain levels of traffic, traffic intensity around the schools, and distance to the nearest petroleum facility. It is envisioned that the results are to be used in a qualitative basis in an epidemiological study of El Paso school children.

The information in this document has been funded wholly or in part by the U.S. Environmental Protection Agency under Contracts Contract 68-D0-0206 to ManTech Environmental Technology, Inc. and 68-D-99-012 to Research Triangle Institute. It has been subjected to Agency review and approved for publication. Mention of trade names or commercial products does not constitute an endorsement or recommendation for use.
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Citation:Smith, L., S. Mukerjee, G. A. Norris, M. Gonzales, C. Stallings, L. Neas, and A. H. Ozkaynak. Prediction of Fine Particulate Levels at Unmonitored Locations. Presented at American Association for Aerosol Research, Anaheim, CA, October 20-24, 2003.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Exposure Modeling Research Branch
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Product Type: Abstrct/Oral
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Presented: 10/23/2003
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Related Entries:
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Bullet Item Measurement and Modeling of Air Pollutants in El Paso, Texas
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Last Updated on Monday, October 22, 2007
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