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Congressional District # 07


EPA ID# WID980823082
Last Updated: May, 2010

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 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, offsite treatment of leachate, site fencing, groundwater and surface water monitoring, and development of an alternate water supply for the nine residents 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, showing that construction was not feasible and on the lack of any 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 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 ensured the continued effectiveness of the selected remedies.  A second five-year review was completed on August 17, 2004.  Among the recommendations was to sample several residential wells which are not part of the normal groundwater monitoring program to ensure these wells remain unimpacted by the site.  This sampling has been completed and the results showed no impact to these residential wells.  The third five-year review was completed on August 17, 2009.  The review found that the cleanup continues to protect people and the environment. The next scheduled review will be in 2014. Another recommendation of the five-year review was to implement institutional controls to prohibit future excavation and well installation on-site.  EPA is working on completing these institutional controls with Mid-State Disposal Inc.

Site-related information is available at the Marathon County Public Library, Stratford Branch Library, 400 N. Fourth Ave., Stratford, 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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