Keystone Corridor Ground Water Contamination
Community Involvement Coordinator
Heriberto León (firstname.lastname@example.org)
312-886-6163 or 800-621-8431, ext. 66163
Remedial Project Manager
312-353-7921 or 800-621-8431, ext. . 37921
IDEM Project Manager
Office of Land Quality
312-353-9298 or 800-621-8431, ext. 39298
The Keystone Corridor Ground Water Contamination site is located in Indianapolis, Indiana. The site consists of the Fall Creek well field and potential sources of the ground water contamination. The ground water has been affected by a chlorinated solvent plume. The site poses a risk to the community due to actual and potential contamination in municipal wells and in several monitoring wells.
The chlorinated solvents found in the Keystone Corridor ground water plume include the following volatile organic compounds (VOCs): tetrachloroethylene (PERC), trichloroethylene (TCE), cis-1,2-dichloroethene (cis-1,2-DCE), and vinyl chloride. The extent of the plume has not been completely determined at this time, but it is estimated to be approximately 4500 feet long (north to south) and approximately 1500 feet wide (east to west).
The local water company is Citizens Water, and it operates nine active municipal wells in the Fall Creek well field. VOCs have historically been detected in five of the wells. These wells are among the oldest in the well system dating back to the 1920's and contribute up to 44 percent of water intake from the well field. In one of the five wells, vinyl chloride has been detected above the Safe Drinking Water Act Maximum Contaminant Level (MCL). However, that well has been removed from service. The water company treats all water and continuously monitors and blends the water before distributing it to the public. A portion of the water company’s service area uses the water from the remaining four active wells.
Investigations by the Indiana Department of Environmental Management (IDEM) could not determine any one specific source or sources of contamination due to the complex geology, the number of potential sources, and the comingling of the contamination. Over forty known users or handlers of solvents in the area have been identified as possible sources.
EPA has been working at a nearby former industrial dry cleaning facility called Tuchman Cleaners since 2012 and has an ongoing removal action there under the Superfund Emergency Response Program. Approximately 29,850,000 gallons of water were pumped and treated from the contaminated aquifer from December 1995 to December 2002 at Tuchman Cleaners. One municipal well has been taken out of production because of its proximity to the path of the plume. EPA is currently installing vapor mitigation systems at residential properties that are above screening levels.
See more information on EPA’s response activities at the Tuchman Cleaners site.
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The site was listed on the National Priorities List in December 2013 (a) to allow for proper and timely investigation of the nature and extent of the contamination of the potential sources, and (b) to enable the EPA to determine cleanup alternatives in order to protect human health and the environment.
Putting a site on the National Priorities List means that the EPA can implement the Superfund cleanup process.
EPA will try to identify any local parties potentially responsible for the contamination. For sites without a viable responsible party, EPA investigates the full extent of the contamination before starting any significant cleanup.
Superfund is the name given to the environmental program established by the Congress of the United States to address abandoned hazardous waste sites. It is also the name of the fund established by the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) of 1980, as amended. The Superfund law allows the EPA to clean up sites—such as the Keystone Corridor—and to compel responsible parties to perform cleanups or reimburse the government for EPA-lead cleanups.
EPA anticipates beginning the investigation of the Keystone Corridor within a year. EPA will continue to work with the community to make sure that they are informed throughout the remedial process.
- HRS Documentation Record (PDF) (42pp, 1.2MB) May 2013