Factors affecting indoor air concentrations of volatile organic compounds at a site of subsurface gasoline contamination

Article Abstract:

Distributions of gasoline vapor from the site of contamination into a building were determined by measuring the concentrations of volatile organic compounds (VOCs) in outdoor air, indoor air, soil gas and groundwater. The highest VOC level was measured in soil gas. Indoor air VOC concentrations were lower than those in soil gas due to dilution of the gas as it enters the building. Microbial degradation was also indicated as a barrier to gasoline vapor transport from soil gas into the building.

Measurement, Environmental aspects, Transportation, Soil pollution, Gasoline, Volatile organic compounds

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Production of the hydroxyl radical in indoor air

Article Abstract:

Reactions between O3 and certain alkenes in indoor environments can lead to hydroxyl radical (OH) concentrations on the order of 2 x 10(super 5) cm(super -3). This is suggested by a one-compartment mass balance model, which was used to examine the indoor production of OH following the reaction of certain alkenes with O3. Among the major sources for indoor OH are the reactions of O3 with d-limonene, alpha-terpinene, 2-methyl-2-butene and alpha-pinene.

Research, Analysis, Indoor air quality, Chemical reactions, Olefins, Alkenes

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