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Congressional District # 02


EPA ID# WID980901219
Last Updated: June, 2015

Site Description

Stoughton City Landfill, encompassing about 27 acres, is located in Dane County, Wisconsin.  It was operated by the City of Stoughton as a landfill between 1952 and 1969.  The landfill was used for the disposal of commercial and municipal wastes.  Uniroyal, Inc., a plastics and rubber products manufacturer, disposed of solvents, other liquid chemicals, and vinyl plastic scrap at the site.  The landfill is located on the edge of the City of Stoughton which has a population of about 12,400 residents.  The residents of Stoughton are all connected to city water.

Site Responsibility

This site is now being addressed through federal and state actions. Previously, potentially responsible parties (PRPs) also participated in the cleanup. 

Threats and Contaminants

The groundwater is contaminated with organic chemicals, including tetrahydrofuran and freon.  Methane has been detected in the landfill.  

Residences were constructed approximately 150 feet from the landfill. 

Cleanup Progress

The remedial investigation and feasibility study (RI/FS) for the site was completed under a Consent Order with the PRPs.  A Record of Decision (ROD) was issued on September 30, 1991, and an Explanation of Significant Differences (ESD) was issued on February 29, 1996.  The site remedy includes capping of the waste disposal area; excavation of some wastes on the edges of the waste disposal area and placement of them under the cap; fencing; land-use restrictions; and long-term monitoring.  It was eventually determined that the groundwater pump and treat system, a contingency in the ROD, would not be needed right away.  It was agreed that the need for the pump and treat system would be assessed again later.

Remedial design (RD) was completed in January 1997.  Mobilization for construction of the remedy began in April 1998.  The cap was successfully installed in 1998, and some materials from other locations on-site were excavated and placed under the cap.  A Preliminary Close Out Report (PCOR) was issued on December 15, 1998, which documented construction completion for the site remedy.

The site is still maintained, and both groundwater and landfill gases are monitored.  This work, called Operation and Maintenance, is performed by the Wisconsin Department of Natural Resources (WDNR).   

A third Five-Year Review for the site was signed on April 15, 2013.   The conclusion of the review was that the remedy was functioning as anticipated.  It was concluded that the remedy was protective of human health and the environment in the short-term.  All institutional controls (deed restrictions) are in place and effective. However, the remedy was not protective in the long-term.  In order for the remedy to be protective in the long-term, groundwater monitoring and gas migration monitoring results must continue and appropriate action must be taken, as needed.  The next five year review is scheduled for completion in April 2018.


Property Reuse

Possible uses for some portions of the site are being investigated with the City of Stoughton.


Remedial Project Manager, U.S. EPA
Giang-Van Nguyen (nguyen.giang-van@epa.gov)
(312) 886-6726

Community Involvement Coordinator, U.S. EPA
susan pastor
(312) 353-1325




Site Profile Information

This profile provides you with information on EPA's cleanup progress at this Superfund site.


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