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SPATIAL AND SOURCE TYPE DISTRIBUTION OF EMISSIONS OF SELECTED TOXIC VOLATILE ORGANIC COMPOUNDS IN THE UNITED STATES IN 1990
Citation:
Benjey, W. SPATIAL AND SOURCE TYPE DISTRIBUTION OF EMISSIONS OF SELECTED TOXIC VOLATILE ORGANIC COMPOUNDS IN THE UNITED STATES IN 1990. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-93/287 (NTIS PB94130119).
Description:
The annual anthropogenic emission, principal contributing source types, and spatial distributions for selected toxic volatile organic compounds (VOCS) are presented for the United States. oxic compounds addressed include acrylonitrile, benzene, perchloroethylene, and trichloroethylene. he emission data, summarized by each state, are estimated from a 1990 interim toxic emission inventory of VOCs for the United States, which was derived by updating portions of the 1985 National Acid Precipitation Assessment Program emission inventory. he most current emission factors and speciation profiles available in late 1992 are used to derive emission estimates for specific toxic compounds. mission factors are used preference to speciation where possible. or each toxic compound examined, annual emissions for dominant point, area, and mobile source categories are presented, with the emphasis on demonstrating any distinct geographical patterns. n general, point source toxic emissions are coincident with urban concentrations and chemical industry concentrations. mission totals generally exceed national estimates based on partial or top-down inventory approaches by one to two orders of magnitude. he implications of source type and geographic concentrations of toxic volatile organic compounds for transport modeling, as, well as further emission data needs are discussed.