Measurement System Evaluation for Upwind/Downwind Sampling of Fugitive Dust Emissions
Aerosol and Air Quality Research, 11: 331–350, 2011 Copyright © Taiwan Association for Aerosol Research ISSN: 1680-8584 print / 2071-1409 online doi: 10.4209/aaqr.2011.03.0028 Measurement System Evaluation for Upwind/Downwind Sampling of Fugitive Dust Emissions John G. Watson1,2*, Judith C. Chow1,2, Li Chen1, Xiaoliang Wang1, Thomas M. Merrifield3, Philip M. Fine4, Ken Barker5 1 Desert Research Institute, 2215 Raggio Parkway, Reno, NV, USA 89512 2 Institute of Earth Environment, Chinese Academy of Sciences, 10 Fenghui South Road, Xi’an High-Tech Zone, Xi’an, China 710075 3 BGI Incorporated, 58 Guinan Street, Waltham, MA, USA, 02451 4 South Coast Air Quality Management District, 21865 Copley Drive, Diamond Bar, CA, USA 91765 5 Sully-Miller Contracting Co., 135 S. State College Boulevard, Brea, CA, USA 92821 ABSTRACT Eight different PM10 samplers with various size-selective inlets and sample flow rates were evaluated for upwind/ downwind assessment of fugitive dust emissions from two sand and gravel operations in southern California during September through October 2008. Continuous data were acquired at one-minute intervals for 24 hours each day. Integrated filters were acquired at five-hour intervals between 1100 and 1600 PDT on each day because winds were most consistent during this period. High-volume (hivol) size-selective inlet (SSI) PM10 Federal Reference Method (FRM) filter samplers were comparable to each other during side-by-side sampling, even under high dust loading conditions. Based on linear regression slope, the BGI low-volume (lovol) PQ200 FRM measured ~18% lower PM10 levels than a nearby hivol SSI in the source-dominated environment, even though tests in ambient environments show they are equivalent.
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