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Development of Mobile Measurement Method Series OTM 33
Citation:
Thoma, E., H. Brantley, B. Squier, J. Dewees, R. Segall, AND R. Merrill. Development of Mobile Measurement Method Series OTM 33. In Proceedings, 108th Annual Conference of the Air & Waste Management Association, Raleigh, NC, June 23 - 26, 2015. Air and Waste Management Association, Pittsburgh, PA, 999, (2015).
Impact/Purpose:
This is conference paper for the 108th Annual Conference of the Air & Waste Management Association, June 23-26, 2015, in Research Triangle Park, North Carolina. The paper discusses progress in development of the OTM 33 mobile measurment method series which is the first NGAM method.
Description:
Starting in 2006, the United States Environmental Protection Agency has explored use of mobile instrumented vehicles for a variety of air quality assessment applications under its Geospatial Measurement of Air Pollution (GMAP) program. GMAP systems utilize next generation, fast-response instruments and precise global positioning systems (GPS) in mobile platforms to gain insight into source emissions, population impacts, and risk mitigation strategies in a variety of use scenarios. Other Test Method 33(OTM 33) describes a subset of GMAP approaches designed to quantify source emissions. OTM 33 techniques typically have two operational modes: (1) mobile mapping surveys to locate sources and (2) measurement and/or characterization procedures to assess near-source concentrations and mass emission rates. This presentation provides a general description of mobile source emission measurement approaches, including strengths and limitations, with a focus on sub-method OTM 33A, a technique for assessment of ground-level point sources such as may be encountered in oil and gas production fields. Other potential OTM 33 sub-methods, such as mobile tracer correlation and flux planes, serve to extend the range of application of OTM 33 to other sources and will be described briefly.