§ 650.83 - Explanation of terms.

(a) Ambient air quality standards. Those standards established pursuant to the Clean Air Act, for protecting public health and welfare.

(b) Emission standards. Permissible limits of emissions established by Federal, State, interstate and local authorities to achieve ambient air quality standards.

(c) Implementation plans. Plans developed and administered by a State to designate the methods used to implement, maintain, and enforce ambient air quality standards in air quality control regions. The plans present an inventory of emissions and their source; a comparison of current emissions with current ambient air quality conditions; amount of emission reduction necessary to attain the ambient air quality standards for each category of emission sources; and plans, including transportation control plans, for achieving emission reductions.

(d) Mobile sources. Vehicles, aircraft, watercraft, construction equipment and other equipment using internal combustion engines as the means of propulsion.

(e) Monitoring. The assessment of emissions and ambient air quality conditions, using techniques such as emission estimates, visible emission reading, diffusion or dispersion estimates, sampling, or measurement with analytical instruments.

(f) Motor vehicle. Any self-propelled vehicle designed for transporting persons or property on a street or highway (section 213, Clean Air Act). Further defined in 40 CFR part 85.

(g) National Emission Standards for Hazardous Air Pollutants. EPA emission standards established for specified hazardous air pollutants emitted by both new and existing stationary sources. (Section 112, Clean Air Act.)

(h) Parking facility. Any off-street area or space, lot, garage, building or structure, or combination or portion thereof, in or on which motor vehicles are parked.

(i) Standards of performance for new stationary sources. Emission standards established for specified pollutant sources, such as industrial facilities (section 111. Clean Air Act).