The Hoskins Manufacturing Mio plant, which operated from the late 1960s to 2001, manufactured thermoelectric nickel and chromium alloys in the form of wire, strip and ribbon. The contamination was caused by poor waste handling and chemical storage practices. Records indicate there were numerous overflows from waste holding tanks, discharges of waste to unlined trenches, improper storage of waste in deteriorating drums outside and spills and overfills from acid and solvent storage tanks. In 1976: a residential drinking water well located 800 feet from the facility was found to be contaminated with chlorides and total chromium. As a result of this discovery, Hoskins Manufacturing was listed as a site of contamination.

The Department of Environmental Quality (DEQ), with the assistance of STS, is assessing the metals, chlorides, and chlorinated volatile organic compounds in the soil, groundwater, and surface water by a variety of investigative techniques. Based upon the results of these and past investigative activities, the DEQ  will complete a feasibility study to identify, evaluate, and propose a remediation alternative which will address the risk to human health and the environment.