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U.S. EPA REGION 5
SHEBOYGAN COUNTY
SHEBOYGAN

Congressional District # 06

WPSC CAMP MARINA MGP

EPA ID# WIN000510058
Last Updated: December, 2011

Site Description

The Wisconsin Public Service Corporation (WPSC) Campmarina Manufactured Gas Plant (MGP) Site is located at 732 North Water Street in Sheboygan, Wisconsin. Currently, the Site is used as a park and marina. There is a river walk located immediately adjacent to the river shoreline. The WPSC Campmarina MGP Site consists of two operable units (OUs). The on-land portion of the Site, referred to as the Upland OU, is aproximately 1.5 acres in size and includes the former MGP facility areas up to a vertical barrier wall adjacent to the Sheboygan River. The river portion of the Site is referred to as the River OU and includes the portion of the Site that was not addressed in the State-issued Record of Decision (ROD), including MGP-related contamination that may have come to be located in the adjacent Sheboygan River, its floodplains, and/or sediment.

The Site is located in an area that was historically industrial. The gas plant was in operation from 1872 to 1929. The potentially responsible party (PRP) is Wisconsin Public Service Corporation, former owner and operator of the Site. The City of Sheboygan currently owns the property. Groundwater depth is from about 5 to 8 feet below the ground surface and flows toward the river. Water depths in the Sheboygan River adjacent to the Site range from about 3.5 to 9 feet and sediment thickness ranges from 2 to 10 feet.

Site Responsibility

The site is not proposed or listed on the National Priorities List but is being addressed under U.S. EPA's Superfund alternative approach. The site is currently being addressed by the potentially responsible party (PRP) with oversight by U.S. EPA.

Threats and Contaminants

Soils, groundwater, floodplains, sediment, and surface water may be impacted by Site contaminants. Contaminants of concern include benzene, toluene, ethylbenzene, and xylene (collectively known as BTEX), naphthalene, total polycyclic aromatic hydrocarbons (PAHs), cyanide and metals.

Cleanup Progress

The PRP performed substantial work in the Upland OU in accordance with a ROD issued by the State of Wisconsin on January 11, 2001. The work consisted of excavation and off-site thermal treatment of 10,500 tons of soil (which was beneficially reused on-site), site grading, material management, disposal of debris, and a containment system. The containment system consists of a vertical sheet pile barrier wall around the perimeter of the Site with an engineered geosynthetic cover over the surface. A biosparge system operates within the containment area to enhance natural degradation of contaminants within the containment barrier. The PRP submits annual groundwater monitoring reports to U.S. EPA and the Wisconsin Department of Natural Resources (WDNR). 

During 1995 and 1996, WPSC conducted an initial assessment of the River OU. The assessment was generally qualitative and evaluated odor, sheen, and tar. As part of that assessment an area of about 3.4 acres was identified to contain MGP residuals. Based on limited surface sediment and core sediment samples, total PAHs were as high as 9,294 mg/kg and total BTEX concentrations were as high as 990 mg/kg. 

The PRP entered into a Settlement Agreement (Docket No. V-W-07-C-862) with U.S. EPA on January 26, 2007, to perform remedial investigation/feasibility study (RI/FS) activities at the WPSC Campmarina MGP Site, at both the Upland and River Operable Units. Field work for the RI/FS took place in the summer of 2008, and the PRP submitted a draft RI report to U.S. EPA for review in January 2009. The PRP submitted a draft FS report for the River OU in May 2009 for U.S. EPA review. U.S. EPA approved the final RI report in December 2009. In June 2011, U.S. EPA issued an Action Memorandum for a time-critical removal action at the River OU to address non-aqueous phase liquid PAH contamination. The removal action was initiated in the summer of 2011 and cleanup work was completed in December 2011. EPA expects to receive the PRP's confirmation sampling results from the removal action by the end of January 2012. U.S. EPA intends to issue for public comment during 2012 a proposed final cleanup plan for the River OU, followed by selection of the final remedy for the River OU in a Record of Decision. A proposed plan and ROD for the Upland OU would follow at a later date.

Community Involvement

In March 2007 U.S. EPA conducted community interviews to assess community interest and concerns related to the Site.

Contacts

Remedial Project Manager, U.S. EPA
pablo valentin (valentin.pablo@epa.gov)
(312) 353-2886

 

 


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