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Congressional District # 07


EPA ID# WID980823082
Last Updated: June, 2015

Site Description

The Mid-State Disposal, Inc. Landfill (Mid-State Landfill) site is located in central Wisconsin, four miles northeast of the village of Stratford, Wisconsin, in Marathon County. The Mid-State Landfill site is a 160-acre parcel of land and includes a 35-acre "Old Mound" landfill, a five-acre "Interim Expansion" area, and a three-acre sludge lagoon. Mid-State Landfill was in operation from 1970 to 1979 and accepted municipal, industrial, and commercial waste. Industrial and commercial wastes that were accepted included: paper mill sludges, asbestos dust, solvents, pesticides, paint sludges, and metals. The Weyerhauser Company, a generator of waste disposed of at the facility, agreed to properly close the site in 1979. Closure actions included removal of ponded leachate and construction of covers on the three waste disposal areas. Also, leachate collection systems were installed in the sludge lagoon and interim expansion areas. 

Site Responsibility

The site was addressed through federal, state, and potentially responsible parties' actions. 

Threats and Contaminants

Groundwater in the vicinity of the site was shown to contain volatile organic compounds (VOCs) including: vinyl chloride, tetrachloroethene, trichloroethene, and benzene. 

Cleanup Progress

A Record of Decision (ROD), signed in September 1988, selected a remedial action (RA) for the site that included construction of a state-compliant landfill cap, installation of a gas extraction and collection system, improvements to site drainage, off-site treatment of leachate, site fencing, groundwater and surface water monitoring, and development of an alternate water supply for the nine residences that are located within one mile from the site.

In 1990, the United States Environmental Protection Agency (EPA) entered into a consent decree with Mid-State Disposal, Inc., the owner/operator, and Weyerhauser Corporation, the generator, to design and implement the selected response actions. A ROD amendment, published in August 1995, eliminated one component of the remedy, namely the construction of the alternate water supply, based on predesign studies that had been completed.  These studies showed that construction was not feasible, and there were no consistent exceedences of state groundwater standards in the nine residential wells that were potentially affected. The ROD amendment called for both continued monitoring of the residential wells and a contingency plan for installation of point-of-use treatment systems, if VOCs above specific concentrations and meeting specific criteria were detected in the residential wells. Construction of the remedy, except for the alternate water supply, was completed in spring 1994. 

The first five-year review, which occurred in fall 1999, documented that the selected remedies were operating effectively.  A second five-year review was completed on August 17, 2004.  That review included a recommendations to sample several residential wells that are not part of the normal groundwater monitoring program to ensure these wells remain unimpacted by the site.  This sampling was completed, and the results showed no impact to these residential wells.  A third five-year review was completed on August 17, 2009.  That review found that the cleanup continues to protect human health and the environment.  The 2009 review also recommended the implementation of institutional controls (ICs) to prohibit future excavation and the installation of wells on-site.  

Following the 2009 FYR report, EPA, with the cooperation of the Wiscosin Department of Natural Resource (WDNR) and Weyerhauser Corporation, folllowed through with the implementation of the ICs (an Environmental Deed Restriction and Environmental Protection Easement).  The ICs were recorded in Marathon County, Wisconsin, on September 30, 2013.

EPA completed a fourth five year review at the site in August 2014, and EPA determined that the remedy is protective of human health and the environment in the short-term because exposure pathways that could result in unacceptable risks are being controlled and monitored through ICs, Site access restrictions, and opereation and maintenace activities. Long-term protectiveness requires that long-term stewardship procedures be implemented, ensuring compliance with effective ICs that are monitored and maintained.

Community Involvement

Site-related information is available at the Marathon County Public Library, Stratford Branch Library, 400 N. Fourth Ave., Stratford, WI and at www.epa.gov/region5/sites/midstate.


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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