Temporal and Modal Characterization of DoD Source Air Toxic Emission Factors
ENVIRONMENTAL PROTECTION AGENCY WASHINGTON DC
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This project tested three, real-near real-time monitoring techniques to develop air toxic emission factors for Department of Defense DoD platform sources. These techniques included resonance enhanced multi photon ionization time of flight mass spectrometry REMPI-TOFMS for organic air toxics, laser induced breakdown spectroscopy LIBS for metallic air toxics, and optical remote sensing ORS methods for measurement of criteria pollutants and other hazardous air pollutants HAPs. Conventional emission measurements were used for verification of the real-time monitoring results. The REMPI-TOFMS system was demonstrated on the following a United States U.S. Marine Corps USMC diesel generator, a U.S. Air Force auxiliary power unit APU, the waste combustor at the Portsmouth Naval Shipyard during a multi-monitor Environmental Technology Verification ETV test for dioxin monitoring systems, two dynamometer-driven high mobility multi-purpose wheeled vehicles HMMWVs, an idling Abrams battle tank, a Bradley infantry fighting vehicle IFV, and an F-15 and multiple F-22 U.S. Air Force aircraft engines. LIBS was tested and applied solely to the U.S. Marine Corps diesel generator. The high detection limits of LIBS for toxic metals limited its usefulness as a real time analyzer for most DoD sources. ORS was tested only on the APU with satisfactory results for non-condensable combustion products carbon monoxide CO, carbon dioxide CO2 but with limited success on condensable volatile organic by-products. This program demonstrated the ability to measure trace aromatics with REMPI-TOFMS in harsh environments and with a high degree of accuracy and precision.
- Test Facilities, Equipment and Methods
- Air Pollution and Control