Congressional District # 07
MCGRAW EDISON CORP.EPA ID# MID005339676
Last Updated: May, 2015
Site DescriptionThe McGraw-Edison Corporation site, located in Calhoun County, Michigan, is approximately 24 acres. The company manufactured air conditioners, humidifiers, and similar equipment from 1958 until 1980. From 1970 to 1980, about 15,000 gallons of "still-bottoms" (an oil waste) contaminated with trichloroethylene (TCE) were spread on the Site's dirt roads to control dust. TCE was found in two onsite water supply wells and 45 nearby residential wells in 1980. Nearby, the City of Albion's municipal wells also showed TCE contamination in the past. The municipal water supply has been extended to all affected residents. However, several residents refused hookup to the municipal water supply. Approximately 11,000 people live within three miles of the site. The Kalamazoo River is located one-half mile from the site and is used for recreational activities.
Site ResponsibilityThis site is being addressed through state and potentially responsible party (PRP) actions.
Threats and Contaminants
The groundwater, stream sediments, surface water, and soils are contaminated with TCE. People may be exposed to site-related contaminants if they inhale airborne materials or ingest or come into direct contact with polluted groundwater, surface water, soils, or stream sediments. Preliminary sample results indicate that further evaluation is needed regarding a potential indoor air concern that may exist at the site. Air quality controls have been established to eliminate the potential for air contamination. Groundwater is still contaminated with TCE, but a purge system is controlling the majority of the contamination.
Cleanup ProgressA Consent Decree (CD) between the State of Michigan and McGraw-Edison Corporation was entered with the Calhoun County Circuit Court on June 11, 1984. Subsequently, this site and the rest of McGraw-Edison was purchased by Cooper Industries of Houston, Texas. A hydrogeologic study of the site was completed by McGraw-Edison. Since the Consent Agreement was signed, 18,980 cubic yards of contaminated soil were removed from the site and disposed of in an approved offsite facility. Many nearby residences were connected to the municipal water system, and a groundwater treatment system was constructed. The groundwater treatment system went into operation in July 1990. In addition, the remaining contaminated soil was treated by "soil flushing," a process in which water is used to wash contaminants from the soil into the groundwater. The groundwater was then extracted and treated to remove the contaminants. On September 10, 1991, both Cooper Industries and the Michigan Department of Environmental Quality performed the pre-final inspection for the site. Operation of the soil flushing system began in May 1992 and was terminated in October 1997.
Approximately 35 low volume extraction wells were installed to prevent contamination within the shallow aquifer from migrating outside the current extent. Groundwater was extracted and then pumped through a tray air stripper system to remove the primary volatile organic compound contamination before discharging it to a storm sewer system under authority of a National Pollutant Discharge Elimination System (NPDES) permit. A horizontal tray stripper was brought online in February 2009, and has been effectively treating the pumped water since that time. The water is still discharged under the NPDES permit. Overall, the groundwater extraction system and horizontal tray strippers have continued to work effectively at reducing concentrations in shallow aquifer at the site. Although fluctuations in the concentrations of TCE in the groundwater have occurred, these fluctuations can be attributed to seasonal variations. Semi-annual monitoring has been agreed to as a reduction from the tri-annual sampling previously required, and will continue as part of the operation and maintenance (O&M) segment of site remediation.
All cleanup or remedial action (RA) activities were completed at this Site on October 12, 1997. Under the terms of the CD, the PRP is responsible for all O&M activities and reporting for the site. A Superfund Site Preliminary Close Out Report (PCOR) was signed on January 28, 1998.
EPA conducted two FYRs. However, in 2009, EPA determined that no further five-year reviews would be conducted at this site because EPA did not concur with the remedy for the Site. The remedy was selected in a Consent Decree between the Michigan Department of Environmental Quality (MDEQ) and PRP, and EPA was not a signatory to the Consent Decree or Record of Decision (ROD).
MDEQ is currently evaluating unresolved issues from previous five-year reviews and continues to work in cooperation with the EPA and the PRP to remove the contaminants from the environment. Sub-slab soil gas samples were collected on June 9-14, 2014 at 21 locations, in accordance with the February 22, 2013 Vapor Intrusion Work Plan approved on April 29, 2014. The purpose of the 2014 vapor intrusion sampling was to define any geographic areas of concern, but not necessarily to assess risk. Results of the 2014 sub-slab soil gas concentrations were below the acute exposure immediate response activity screening levels for TCE and perchloroethylene (PCE).
Property ReuseIn 2012, the site was purchased by Gene Sorgi and is partially being reused for warehousing and assemblying of satellite dish components under the name Challenger Communications.
ContactsRemedial Project Manager, U.S. EPA
Karen Mason-Smith (email@example.com)
Community Involvement Coordinator, U.S. EPA
MCGRAW-EDISON CO AIR COMFORT DIV