Abstract
Volatile organic compounds were isolated, identified, and quantitated in wastewater influents and effluents by using the EPA Master Analytical Scheme. These analyses were performed as part of a U.S. EPA assessment of water quality in the Great Lakes basin. In addition to 50 target compounds, up to 55 nontarget (unknown) compounds were identified and quantitated in 20 samples obtained from public-owned treatment works (POTWs). This analytical approach showed clear reductions between influents and effluents, in the number of compounds identified, the total concentration of halogenated and nonhalogenated compounds, and the concentration of the largest component. Reductions in the number of target compounds detected in influents vs effluents were relatively small in proportion to reductions in the total amounts of halogenated and nonhalogenated compounds. Overall, reductions in nontarget compounds, before and after treatment, were comparable to reductions in target compounds in terms of both number and total concentration.
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