The Winnebago Landfill is located west of Acme Solvent, a former solvent reclaiming company. Acme was listed as a Superfund site in 1983. In 1986,  the now closed North Unit of the landfill was designated a Superfund site by the USEPA. The ROD (Record of Decision) for the site was adopted in June 1991 and an agreement with the USEPA for the remedial work was reached in 1993. Releases from Acme (Superfund site) to the groundwater were transported down gradient towards the landfill. Over the years, much of the ground chemistry analyses performed around the landfill were done to identify the impacts from the Acme Solvent facility. Additional studies performed down gradient of the landfill indicated that the landfill did not pose a public safety risk and could operate in compliance with the new, more stringent state and federal landfill regulations. The follow-up reviews by the USEPA, last done in 2002, confirm that the procedures in place and the processes followed continue to be appropriate for the site.