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Congressional District # 05


EPA ID# WIN000510210
Last Updated: May, 2015

Site Description

The Amcast Industrial site includes the Amcast property and surrounding areas that include residential properties, the storm water retention area (Wilshire Pond), Zeunert Park Quarry Pond, and storm sewers. The Amcast Industrial property is located at N39 W5789 Hamilton Road, with portions of the property located on the north and south sides of Hamilton Road, in the City of Cedarburg, Wisconsin. The property south of Hamilton Road (South Property) includes an office building, storage Quonset building, parking lot, and a former disposal area. The property north of Hamilton Road (North Property) includes the main manufacturing facility.  

The present site of the Amcast office building was formerly the location of the Meta-Mold Aluminum Company, an aluminum die-cast facility that started operating around 1939. The original foundry facility, formerly located east of the office building, was demolished between 1975 and 1980. The demolition and debris was placed in the south-southeast portion of the South Property (former disposal area). The former disposal area reportedly also received demolition debris from previous site structures, general office and/or factory refuse (e.g., paper and wood), and scrap metals. It is unknown when the manufacturing operation began on the North Property. 

Site Responsibility

In February 2003, Amcast signed an Administrative Order on Consent (AOC) with the U.S. Environmental Protection Agency (EPA) to conduct a Remedial Investigation (RI) at the Amcast facility, which at the time was considered part of the Cedar Creek Site. (The Cedar Creek Site is a separate site; it is not on the National Priorities List [NPL] but is being addressed using the Superfund Alternative Approach.) Amcast completed some of the RI activities in 2003 and 2004 but then filed for bankruptcy under Chapter 11 in November 2004 before the RI was complete. Amcast operated until December 2005 when they filed for bankruptcy a second time under Chapter 11 plan of liquidation. Subsequently, EPA proposed the Amcast facility for the NPL in April 2009 and finalized the site on the NPL in September 2009, making the site eligible for federal cleanup funds. The site is now being addressed by EPA, with support from the Wisconsin Department of Natural Resources (WDNR).

Threats and Contaminants

Past investigations at the South Property have detected the presence of polychlorinated biphenyls (PCBs) in soils below the parking lot, the railroad right-of-way east of the parking lot, the fill and subsurface soils below the former disposal area, the storm sewer system, and the shallow groundwater. In addition, PCBs were detected in the sediments in the Zeunert Park Quarry Pond. The South Property is located near the Quarry Pond and is the apparent source of PCBs. Similarly, investigations at the North Property have reported the detection of PCBs in stormwater, the loading dock area, residential properties near the plant, and the storm sewer system, including Wilshire Pond. 

Cleanup Progress

EPA initiated a fund-lead remedial investigation/feasibility study (RI/FS) for the site in August 2009. RI sampling activities started in September 2011, and EPA's contractor submitted the draft RI report in April 2013.  The final RI report will be completed in June 2015.   

Community Involvement

In September 2011, EPA interviewed residents and local officials regarding the RI sampling. 


Remedial Project Manager, U.S. EPA
scott hansen (hansen.scott@epa.gov)
(312) 886-1999

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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