From May 2001 to January 2002, the Illinois EPA sampled more than 500 residential wells in unincorporated areas near Downers Grove, Illinois, and found more than 400 of these wells contained the chemicals trichloroethylene and/or tetrachloroethylene. Of those, more than 200 contained concentrations that were above the federal safe drinking water standards. As a result, one of the most intensive groundwater investigations ever undertaken in Northern Illinois was conducted by U.S. EPA Region 5's Emergency Response Branch and the Illinois EPA.
The Ellsworth Industrial Park Site is a direct result of this $2 million-dollar effort. The investigation indicated that a group of 15 former and present businesses and individuals in the industrial park that investigation may be responsible for the residential ground water contamination. The U.S. EPA sent General and Special Notice Letters to this group of "Potentially Responsible Parties," or PRPs, in the September and October of 2002. The U.S. EPA has asked the PRPs to address the threat to human health and the environment by paying most of the cost to supply approximately 800 homes with drinking water from Lake Michigan and by beginning their own investigation of how to address the contamination in the area's groundwater. Links to the U.S. and Illinois EPA websites are below:
http://www.epa.state.il.us/land/ http://www.epa.gov/region5/



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