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Congressional District # 05


EPA ID# WID058735994
Last Updated: December, 2011

Site Description

From the mid-1950s to 1972, the 58-acre Boundary Road Landfill Superfund Site (also known as the Lauer I Sanitary Landfill), located in Menomonee Falls, Wisconsin, accepted a variety of municipal and industrial wastes.  The owners closed and covered the Site in 1973. It took several years for the owners to vegetate the cover and properly abandon the Site. In 1973 and 1974, state inspectors identified holes in the berm around the Site that allowed leachate from a collection pond to escape into a ditch that drains into the Menomonee River. In 1981, the owner installed an underground wall of clay materials between the landfill and the pond to stem the flow of leachate. Currently, Waste Management of Wisconsin (Waste Management) collects leachate accumulating behind the cut-off wall and sends it to a municipal wastewater treatment plant. Approximately 23,500 individuals reside within a three-mile radius of the Site.

The U.S. Environmental Protection Agency (U.S. EPA) proposed the site for the National Priorities List (NPL) in September 1983 and finalized the site on the NPL in September 1984.

Site Responsibility

This Site is being addressed through state enforcement of potentially responsible parties' actions. 

Threats and Contaminants

Soils and leachate are contaminated with benzene, cyanide, toluene, and zinc. Waste Management has redesigned and reconstructed the landfill cover to meet current landfill design requirements. The new cover controls rainwater infiltration, decreasing leachate production. The landfill is no longer used for recreational purposes, and leachate is contained within the Site boundaries. 

Cleanup Progress

In August 1990, the State of Wisconsin and one potentially responsible party (PRP), Waste Management, signed an agreement. The agreement requires Waste Management to take responsibility for investigating Site contamination and for designing and constructing the State-selected cleanup action. 

Waste Management completed an investigation in 1993 under state enforcement and guidance to determine the nature and extent of contamination and to identify alternative cleanup methods. Based on the results of the investigation, the Wisconsin Department of Natural Resources (WDNR) selected a remedy in 1996 which includes upgrading the existing landfill cap and leachate and gas collection systems. Waste Management completed the required construction work in October 1998, and is currently conducting scheduled monitoring: shallow downgradient monitoring wells, including those at the perimeter of the Site, are monitored quarterly, deep downgradient monitoring wells at the perimeter of the Site are monitored semiannually, and downgradient private wells are monitored annually. 

WDNR and U.S. EPA completed a five-year review on September 27, 2002. The review showed that current exposure pathways that could result in unacceptable risks are being controlled, and that the remedy will be fully protective of human health and the environment when groundwater cleanup goals are attained. Long-term protectiveness will be verified by continuing groundwater monitoring.

WDNR and U.S. EPA completed the second five-year review on September 20, 2007.  The review concluded that the Site is expected to be protective of human health and the environment when all groundwater clean-up goals are achieved. In the interim, exposure pathways that could result in unacceptable risks are being controlled. Long-term protectiveness requires maintenance of the Site remedy components and compliance with institutional controls. This compliance will be ensured by implementing, maintaining, and monitoring institutional controls. U.S. EPA continues to work with WDNR and Waste Management to have Waste Management implement the remaining, outstanding action items related to institutional controls in the 2007 Five-Year Review Report and in U.S. EPA's Institutional Control Plan. 

The next five-year review for the Site is expected to be completed by the summer of 2012.



Remedial Project Manager, U.S. EPA
linda kern (kern.linda@epa.gov)
(312) 886-7341

Community Involvement Coordinator, U.S. EPA
bri bill
(312) 353-6646




Site Profile Information

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


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