Bulk fuel storage and dispensing facilities generate large volumes of gasoline vapor during the transport vehicle loading operations. These vapors are processed by a variety of control devices including chillers, condensers, carbon adsorption units, thermal oxidizers, and flares. The primary components of reformulated gasoline vapor are benzene, hexane, toluene, xylenes, and other nonmethane hydrocarbons. Since the vapor processors are designed to recover as much fuel as is economically possible, the actual composition of the released hydrocarbons may differ from gasoline vapor. In general, the larger organics compounds are recovered and the lighter ends are emitted.