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Lake Michigan Sediment Contamination from 73 Years of Trap and Skeet Shooting

1993; Pergamon Press; Volume: 28; Issue: 8-9 Linguagem: Inglês

10.2166/wst.1993.0636

1996-9732

D. B. Pott, B. K. Shephard, Aayush Modi,

Groundwater flow and contamination studies

This study assessed sediment and soil contamination at the site of the former Lincoln Park Gun Club located on the shore of Lake Michigan in Chicago. Between 1918 and 1991 a shooting organization utilized the site for trap and skeet shooting, discharging tons of lead shot and clay targets to Lake Michigan. The targets were primarily dolomitic limestone with a petroleum pitch binder containing polynuclear aromatic hydrocarbons (PAH). This study measured vertical and lateral extent of lead and PAH contamination in site soils, near-shore sediments, lake water and ground water. Statistically significant correlations were found between the following pairs of Lake Michigan sediment analyses: TCLP lead and total lead; TCLP lead and supernatant lead; and supernatant lead and total lead. No significant correlations were found between any of the lead chemical analyses and lead shot counts. Microbial bioassays performed on sediment extracts found no measurable toxicity.