Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. REPORT DATE OCT 20032. REPORT TYPE CP 11065e. TASK NUMBER 5f. WORK UNIT NUMBER PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) University of Utah College of Engineering 1495 East 100 South Salt Lake City, UT 841128. PERFORMING ORGANIZATION REPORT NUMBER SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Strategic SERDP SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENT Approved for public release, distribution unlimited SUPPLEMENTARY NOTESThe original document contains color images. ABSTRACTThis study developed and validated innovative techniques for characterizing the amount and composition of PM10, PM2.5, and smaller particles for four major classes of DoD emission sources: aircraft ground support vehicles, rocket motors, aircraft, and sandblasting operations. The techniques include the coupling of dilution samplers with advanced measurement techniques for composition and size that provide detailed analyses sufficient to complete a material balance. The size-classified analyses include measurement made with the cascade impactor and aerosol time-of-flight mass spectrometer (ATOFMS). A photoelectric aerosol sensor (PAS) was being evaluated for use in rapidly evaluating field emissions of particle-bound polycyclic aromatic hydrocarbons (PAH). In addition, a photoacoustic spectrometer was investigated for use in measuring soot particle concentrations. The objective was to calibrate and enhance these instruments for DOD use. To this end, the devices are being demonstrated at DoD facilities, and the methodologies developed will be transferred to personnel responsible for monitoring emissions at DoD facilities. 15 What is particulate matter?PM is material suspended in the air, and it can include soil, road dust, soot, smoke, and liquid droplets. PM can come directly from sources like vehicles, ships, aircraft, unpaved roads, and wood burning. Larger particles, those with a diameter larger than 2.5 µm (PM 2.5 ), typically come from unpaved roads and windblown dust, but finer particles, those smaller than PM 2.5 , typically come from combustion sources: vehicles, ships, etc. PM is also formed in the air when gases from burning fuels react with sunlight and water vapor (Figure 1-1). PM fou...