WPSC Two Rivers MGP Site
Community Involvement Coordinator
Susan Pastor (email@example.com)
312-353-1325 or 800-621-8431, ext. 31325
Remedial Project Manager
312-886-6244 or 800-621-8431, ext. 66244
312-353-7613 or 800-621-8431, ext. 37613
(where to view written records)
Lester Public Library
1001 Adams St.
Two Rivers, WI
The Wisconsin Public Service Corp. site is located in Two Rivers, Wis., adjacent to the West Twin River. Currently, about half of the 5-acre former MGP plant is wetland near the river’s shore, accessible by water. The former MGP building and other structures and foundations have been demolished. A fence was installed around the perimeter to prevent trespassing.
WPSC owned and operated the gas plant from 1925 to 1946 in an area that was historically industrial. Processes included coal carbonization and carbureted water gas. WPSC still owns the site today.
Under Wisconsin Department of Natural Resources oversight, various investigations have taken place since the 1990s. From 2003 to 2005, pilot tests were done to try a then-promising technology called in-place chemical oxidation to treat contaminated groundwater. Routine groundwater monitoring occurs annually.
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A short-term cleanup is underway at this former MGP site in Two Rivers. For the purpose of this cleanup, the site has been separated into three areas (see below), referred to as Areas A, B and C.
Excavation of subsurface structures such as piping and concrete, along with some drilling pilot tests, began the week of September 8. When peat is removed from Areas B and C, beginning the week of September 15, residents may notice extra truck traffic. There may also be some odors because the peat is contaminated with the waste buried onsite. Sandbag dikes and an underwater “curtain” will be installed along the river to prevent any contaminated soil from entering the water.
This project, which will run through December, includes securing the area, monitoring the air, excavating and disposing of the contaminated soil and sediment, and stabilizing any remaining contaminated soil on site.
- Area A—This includes the eastern portion of the WPSC property where the former MGP operations occurred. Soil excavation will start at or near the ground’s surface and go down about 6 feet. Approximately 7,100 cubic yards of soil, which can be compared to a football field covered with soil piled about 3 feet high, will be excavated and disposed of at a nearby landfill licensed to accept non-hazardous waste. This is also referred to as “dig’n’haul.”
- Area B—This includes the central portion of the property which has wetlands as boundaries. Soil excavation will start at or near the ground’s surface and go down about 20 feet. Approximately 22,600 cubic yards of soil, which can be compared to a football field covered with soil piled about 10 feet high, will be excavated and stabilized on site. Stabilization involves injecting a cement-like mixture into the ground which locks the pollution and soil in place so it can’t move to where people could come into contact with it.
- Area C—This includes the western portion of the property wetlands along the nearby West Twin River. Soil excavation will start at the ground’s surface and go down about 20 feet. Approximately 11,600 cubic yards of soil, which can be compared to a football field covered with soil piled about 5 feet high, will be removed or stabilized in place.
Neighbors will probably notice engine noise from the equipment used in the stabilization process, extra truck traffic during the dig’n’haul activities, and air monitoring stations making sure excess dust isn’t released into the air. Although the project is expected to be completed by December, workers may return in spring 2015 to reseed and regrade the property.WPSC/Integrys is conducting and paying for the work under an EPA legal agreement called an administrative order on consent.
In addition to this work, plans are underway for a long-term investigation and cleanup of sediment, groundwater and soil here as well as at five other MGP sites. This is taking place under another administrative order which was signed between WPSC and EPA in May 2006.
The agreement includes five other MGP sites in Green Bay, Manitowoc, Marinette, Oshkosh, and Stevens Point, Wisconsin. A separate agreement for another site, WPSC Campmarina MGP in Sheboygan, was signed between WPSC and EPA in January 2007.
Manufactured Gas Plants (MGPs)
EPA Region 5 is working on former MGPs in Wisconsin and Illinois.
- Enforcement Action Memorandum (PDF) (28 pp, 2MB) July 2014
- Signed Removal Order (PDF) (28 pp, 8.6MB) July 2014
- Administrative Settlement Agreement and Order on Consent for Remedial Investigation and Feasibility Studies (PDF) (89pp, 8.8MB) April 2006