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VISTAS – means Visibility Improvement State and Tribal
Association of the Southeast. A collaborative effort of state
governments, tribal governments, and various federal agencies
established to initiate and coordinate activities associated
with the management of regional haze, visibility, and other
air quality issues in the Southeastern United States.
VMT – means vehicle miles traveled. One vehicle traveling
the distance of one mile equals one VMT. This measure is used
to estimate congestion, fuel consumption, and a host of other
key transportation-related factors.
Volatile Organic Compound or VOC – means a volatile organic compound as that term is defined by the USEPA at 40 CFR 51.100(s). A VOC per this definition is any compound of carbon (other than carbon monoxide, carbon dioxide, carbonic acid, metallic carbonates, metallic carbides, and ammonium carbonate) which participates in atmospheric photochemical reactions. This term excludes those compounds which the USEPA has excluded from its definition of VOC in the list set forth at 40 CFR 51.100(s).