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Lake Michigan Mass Balance Study Atmospheric Mercury Data Report
Gerald J. Keeler, Matthew S. Landis, and Scott Deboe
University of Michigan Air Quality Laboratory
Ann Arbor, Michigan 48109-2029
Submitted in Partial Fulfillment of EPA Grant No. GL995569-01
Overview
The following document is the Lake Michigan Mass Balance Study Data
Report for atmospheric mercury (Hg) samples collected from July 1,
1994 through October 31, 1995. All samples were collected by field
technicians selected by EPA and trained by University of Michigan
Air Quality Laboratory (UMAQL) personnel. Personnel from the UMAQL
conducted a field audit at each sampling site every six months to
evaluate the equipment and perform preventive maintenance. No
Atmospheric Hg samples were missed because of sampling equipment
failure. Particulate phase, vapor phase, and precipitation samples
were collected for Hg determination from five locations around Lake
Michigan. The five sampling sites were: Bondville, IL (40.03"N,
88.22"W); Chiwaukee Prairie, WI (42.50°N, 87.8 1 OW); IIT-Chicago.
IL (41.83"N, 87.62"W); Sleeping Bear Dunes, MI (44.76"N, 86.06"W);
and South Haven, MI (42.37"N, 86.33"W). All samples were analyzed at
the UMAQL using Cold Vapor Atomic Fluorescence Spectroscopy (CVAFS).
A comprehensive discussion of field collection and laboratory
analysis techniques can be found in the Lake Michigan Mass Balance
Study Methods Compendium (EPA 905-R-97-0 12a & EPA 905-R-97-0 12b).
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