Ambient chemical patterns with source

Acrylonitrile has not been detected to occur at measurable concentrations in ambient air. Measurable levels of atmospheric acrylonitrile are associated with industrial sources. Mean 24-h aciylonitrile concentrations in atmospheric samples collected within 5 km of factories producing or using acrylonitrile ranged from less than 0.1 to 325 j,g/m3. The occurrence of acrylonitrile was correlated with wind patterns the highest concentrations were downwind of and in close proximity to the plant. The median concentration of aciy lonitrile for 43 measurements in source-dominated areas (i.e., near chemical plants) was 2.1 jig/m (Agency for Toxic Substances and Disease Registry, 1990). 

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