Congressional District # 01
PMC GROUNDWATEREPA ID# MID006013049
Last Updated: May, 2015
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.
PMC 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.
Soils at the PMC facility contained high levels of VOCs, semi-VOCs, and elevated levels of metals. There are approximately 7,000 people living within a three-mile radius of the site. The population during the summer months increases to about 11,000. A high school, college, and hospital receive water from the municipal supply system. Three private wells are operating about one-half mile west of the contaminated municipal well. The nearest residence is located less than 250 feet from the site.
Site ResponsibilityThis site is being addressed through federal, state, and potentially responsible parties' actions.
Threats and Contaminants
Groundwater at the site contains VOCs, including TCE.
Prior to the cleanup of the PMC Facility, soils at the site contained VOCs, semi-VOCs, pesticides, and elevated levels of metals. People may have been exposed to hazardous chemicals from the site by drinking or coming into direct contact with contaminated water from the contaminated municipal well. People could be exposed to hazardous chemicals at the Petoskey Municipal Well Field site by touching or ingesting contaminated soil at the PMC facility.
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.
The remedy for the site included:
• The excavation and off-site disposal of approximately 2,500 cubic yards of contaminated soil.
• The installation and operation of a Soil Vapor Extraction (SVE) system to remove volatile organic compounds (VOCs) from subsurface soils.
• Monitored natural attenuation of the groundwater, which included the development of a Groundwater Monitoring Plan, followed by installation of a monitoring well network and an initial three-year period of quarterly monitoring and long-term monitoring after that.
• Establishment and maintenance of Institutional Controls (ICs) on the former PMC Property.
The contaminated Ingalls municipal well was removed from service in 1995 and completely demolished in 2006. Redevelopment of the former PMC property in accordance with restrictive deed covenants has eliminated the possibility of human contact with contaminated soil.
A Third Five-Year Review (FYR) was completed in December 2014. The FYR indentified five issues that will require follow up action:
- A soil gas investigation will be performed to insure that vapor intrusion is not a potential concern at the condominium redevelopment.
- Groundwater will be monitored for 1.4 Dioxane, an emerging contaminant that was not analyzed for previously.
- A Focused Feasibility Study will be completed to evaluate a contingent remedy to address the persistent TCE contamination at the site.
- Additional groundwater level measurements will be obtained to determine if MDEQ Groundwater-Surface Water Interface (GSI) Criteria are applicable to the site.
- The Long-Term Monitoring Plan will be amended to add a section on long-term stewardship of ICs.
EPA plans to start all of the listed actions in 2015.
The primary source of contamination, the former PMC building was torn down in July 2004. The site has been replaced by a new condominium development, the first phase of which was sold out in 2005. The foundation for the final phase of the development was completed in 2007, and construction was completed in 2014.
A four square block area including and surrounding the site has undergone a major public infrastructure redevelopment by the City of Petoskey. Roads have been relocated and repaved, electric/phone/cable utilities have been placed underground, and a completely new lakefront park has been constructed and landscaped. The Ingalls well and well house were removed in 2006. A new bike path runs through the site which connects the Bay Harbor development to the west with downtown Petoskey to the east. Surrounding housing has become extremely desirable for summer homes due to the convenient downtown lakefront location.
ContactsRemedial Project Manager, U.S. EPA
owen thompson (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA
AliasesPETOSKEY MUNICIPAL WELL FIELD
PETOSKEY MFG CO INC