Superfund Site: PMC GROUNDWATER, PETOSKEY, MI
Superfund Site Profile
Until late 1997, the Petoskey Municipal Well Field provided drinking water for the residents of Petoskey, Michigan. The Ingalls Shore Municipal Well, one of only two wells that served the municipal water system, provided 60 to 70 percent of the city's water and was located about 200 yards northwest of the Petoskey Manufacturing Company (PMC), the suspected source of contamination of the well field. Water from the City of Petoskey's Ingalls Municipal Well contained volatile organic compounds (VOCs), primarily trichloroethylene (TCE), from the PMC site.
A groundwater contamination plume had migrated from PMC to the well where it was drawn into the city's water supply system. The city has replaced the contaminated Ingalls Well with a new groundwater source, so Petoskey residents no longer consume drinking water that has been impacted by PMC. PMC had operated a die casting plant at this location since 1946 and a painting operation since the mid to late 1960s. PMC stopped operating its facility in 2001. Disposal of spent solvents and paint sludge on the ground surface outside the PMC building contaminated soils and groundwater in the vicinity of the site. The Ingalls Well was removed by the City of Petoskey in 2006.
Today, the remaining threat is from a TCE plume that extends between the former PMC facility and the former municipal well location. Since the municipal well no longer exists and all residents in the area are served by city water, the emphasis has shifted to containing the remaining contamination and preventing any significant release to Little Traverse Bay surface water. Concentrations of TCE continue to decrease very slowly and the plume continues to move in a more northerly direction toward the bay, and away from the former Ingalls Well. Several wells still have TCE concentrations significantly above drinking water standards, but the data indicate that the contamination presents no significant threat to Little Traverse Bay.
Previously named the “Petoskey Municipal Well Field.” the site name was changed to “PMC Groundwater” in 2007 at the request of the City of Petoskey. The change recognizes that the well field no longer exists, and that the city is not a liable party for the cleanup.