Monitoring and Source Apportionment of Particulate Matter near a Large Phosphorus Production Facility |
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| Authors: | Robert D Willis William D Ellenson Teri L Conner |
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| Institution: | 1. ManTech Environmental Technology, Inc. , Research Triangle Park , North Carolina , USA willis.robert@epamail.epa.gov;3. ManTech Environmental Technology, Inc. , Research Triangle Park , North Carolina , USA;4. National Exposure Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA |
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| Abstract: | ABSTRACT A source apportionment study was conducted to identify sources within a large elemental phosphorus plant that contribute to exceedances of the National Ambient Air Quality Standards (NAAQS) for 24-hr PM10. Ambient data were collected at three monitoring sites from October 1996 through July 1999, and included the following: 24-hr PM10 mass, 24-hr PM2.5 and PM10–2.5 mass and chemistry, continuous PM10and PM2.5 mass, continuous meteorological data, and wind-direction-resolved PM2.5 and PM10 mass and chemistry. Ambient-based receptor modeling and wind-directional analysis were employed to help identify major sources or source locations and source contributions. Fine-fraction phosphate was the dominant species observed during PM10 exceedances, though in general, re-suspended coarse dusts from raw and processed materials at the plant were also needed to create an exceedance. Major sources that were identified included the calciners, the CO flares, process-related dust, and electric-arc furnace operations. |
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