Toxic organics and trace metals in air and precipitation at sites near Lake Michigan
- Illinois State Water Survey, Champaign, IL (United States)
Between April 1994 and October, 1995, the US Environmental Protection Agency sponsored an intensive monitoring effort on Lake Michigan to acquire data needed to construct a mass balance model for selected toxic chemicals in the lake. As part of this effort, the authors operated 7 air monitoring stations on the shores of Lake Michigan and one rural inland station. Samples of precipitation, airborne particles, and gas phase organics as well as continuous meteorological data were collected at each of the sites. The samples were analyzed for 105 individual PCB congeners, 13 organochlorine pesticides, 18 PAHs, and 13 trace metals. These data will be used by the Lake Michigan modeling group to estimate inputs of target chemicals to the lake from the atmosphere. In this report, the authors discuss the spatial and seasonal variations seen in the concentrations of the target chemicals measured at the 8 monitoring sites. The annual average concentrations of most analytes measured at the Chicago urban site were 5 to 50 times higher than those measured at the rural and remote sites. However at certain times of the year, high concentrations of PCBs and a few pesticides were also measured at some of the rural sites. The use of these data in atmospheric deposition calculations for Lake Michigan is discussed.
- OSTI ID:
- 351159
- Report Number(s):
- CONF-970677-; TRN: IM9925%%321
- Resource Relation:
- Conference: 90. annual meeting and exhibition of the Air and Waste Management Association, Toronto (Canada), 8-13 Jun 1997; Other Information: PBD: 1997; Related Information: Is Part Of 1997 proceedings of the Air and Waste Management Association`s 90. annual meeting and exhibition; PB: [7000] p.
- Country of Publication:
- United States
- Language:
- English
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