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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. HEW U.S. Department of Health, Education and Welfare IC internal combustion LACPCD Los Angeles County Air Pollution Control District LDT light-duty truck LEV low-emission vehicle LPG liquified petroleum gas LVW loaded vehicle weight MDPV medium-duty passenger vehicle MDT medium-duty truck MDV medium-duty vehicle MECA Manufacturers of Emissions Control Association MOA memorandum of agreement MOBILE6 emissions model used by EPA for mobile sources MVPCB Motor Vehicle Pollution Control Board N2 diatomic nitrogen NAAQS National Ambient Air Quality Standards NAPCA National Air Pollution Control Administration NLEV National Low Emission Vehicle Program NMHC nonmethane hydrocarbon (see Appendix B for definition of various terms used for HCs) NMOG nonmethane organic gas (see Appendix B for definition of various terms used for HCs) NO2 nitrogen dioxide NOx oxides of nitrogen gases NRC National Research Council O2 diatomic oxygen O3 ozone OBD onboard diagnostics OTC Ozone Transport Commission PAH polycyclic aromatic hydrocarbon PC passenger car PCV positive crankcase ventilation PM particulate matter PZEV partial zero-emission vehicle R&D research and development RIA regulatory impact assessment RHC reactive hydrocarbon (see Appendix B for definition of various terms used for HCs) ROG reactive organic gas (see Appendix B for definition of various terms used for HCs)
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