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SHEBOYGAN COUNTY
SHEBOYGAN
Congressional District # 06
WPSC CAMP MARINA MGP
EPA ID# WIN000510058Last Updated: April, 2008
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. The on land portion of the Site which is referred to as the Upland Operable Unit, 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 Operable Unit and it includes the portion of the Site that was not addressed in the Site State issued Upland ROD, including MGP related contamination that may have come to be located in the adjacent Sheboygan River, its floodplains, 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 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 RI/FS will be performed by the potentially responsible party (PRP) with oversight by U.S. EPA. The site is not proposed or listed on the National Priorities List but is being addressed as a Superfund Alternative Site.
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 ("BTEX"); naphthalene; total polycyclic aromatic hydrocarbons ("PAHs"); cyanide; and metals.
Cleanup Progress
The PRP has performed substantial work in the Upland Operable unit. The work in the Upland Opoerable Unit was performed in accordance with a Record of Decision ("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.
An initial assessment of the River Operable Unit has been conducted. 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 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 RI/FS activities at the WPSC Campmarina MGP Site.
Currently, USEPA is in the process of reviewing the Remedial Investigation/ Feasibility Study (RI/FS) Work Plan which was developed by the PRP. Field work for the RI/FS is expected to take place August through September 2008.