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Congressional District # 02


EPA ID# WID980610646
Last Updated: May, 2015

Site Description

The City Disposal Corporation Landfill (CDCL) site is located on approximately 38 acres of land in Dane County, Wisconsin. The landfill was opened in the mid-1960s and closed in 1977.  Household wastes, industrial wastes, general construction wastes, and debris were disposed of at the site. Industrial wastes included, but were not limited to, discarded solvents from plastics manufacturing, paint wastes, oily residues, etc. The total volume of wastes disposed of is approximately 700,000 cubic yards. Of the 12 cells used for waste disposal, Cells 6 and 12 received industrial wastes. The surrounding area was rural during the years of the site's operation, but is changing with the growth of the Madison area. 

Site Responsibility

The site is being addressed through federal, state and a potentially responsible party's (PRP) actions.

Threats and Contaminants

Onsite groundwater and soil are contaminated with volatile organic compounds (VOCs). The primary groundwater contaminants are tetrahydrofuran (THF), 2-butanone, acetone, carbon tetrachloride, trichloroethene and toluene. Potential health threats to people include drinking contaminated groundwater, accidentally ingesting contaminated soil, inhaling contaminated dust and air particles, and coming into direct contact with contaminated groundwater and soils. Grass Lake, a habitat for sandhill cranes and other wildlife, is located about 700 feet northeast of the site and could be subject to pollution from site runoff. 

Cleanup Progress

The site was placed on the National Priorities List (NPL) in 1984. In 1987 and 1988, several potentially responsible parties (PRPs) entered into an agreement with the United States Environmental Protection Agency (EPA) to investigate contamination at the Site by conducting a remedial investigation/feasibility study (RI/FS). The RI/FS was completed in 1992. In September 1992, EPA signed a record of decision (ROD), calling for placement of a nonhazardous waste cover over the majority of the site, placement of a hazardous waste cover over Cells 6 and 12, landfill gas venting and treatment, and groundwater extraction and treatment along with appropriate monitoring. In March 1993, EPA issued a unilateral administrative order (UAO) which required that a remedial design and remedial action (RD/RA) be conducted. The UAO was replaced by a Consent Decree in 2005, which now serves as the primary enforcement document covering site work. 

The remedial work at the site has proceeded in two distinct phases. Installation of the landfill gas collection system and a clay cap were completed in October 1995. Attention shifted to groundwater control elements of the remedy.

In June 1997, EPA signed an explanation of significant differences (ESD) which required groundwater extraction and interim treatment at the nearby Madison Publicly Owned Treatment Works (POTW). Initial monitoring results indicated that the degree of change in contaminant levels was sufficient to recommend a permanent treatment system for the site.  The system started running in 2000. Discharge is routed to a wetland area and subsequently to a swale to Badfish Creek. Ongoing monitoring ensures effluent limits are not exceeded.  Since groundwater treatment operations began the removal efficiency has been very good with minor setbacks. 

EPA and WNDR have  written four five-year reviews for the CDCL site The most recent Five-Year Review was signed on February 23, 2015. The review found that the remedy remains protective of human health and the environment in the short-term.  However, in order for the remedy to be protective in the long-term, the current remedial measures should be evaluated to determine whether groundwater cleanup goals will be achieved within a reasonable timeframe.


Remedial Project Manager, U.S. EPA
Karen Mason-Smith (mason-smith.karen@epa.gov)
(312) 886-6150

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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