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Envirochem Corp.

Site Information
Contact Information

Community Involvement Coordinator
Cheryl Allen (allen.cheryl@epa.gov)
312-353-6196 or 800-621-8431, ext. 36196

Remedial Project Manager
Matthew Ohl
312-886-4442 or 800-621-8431, ext. 64442



(where to view written records)

Library Name
Street Address
Town, ST


Envirochem Corp. is owned and operated a waste storage and recycling business on 6 acres in Boone County, Zionsville, Indiana. The site is adjacent to the Northside Landfill. The facility recovered solvents and oils from industrial sources from 1977 until May 1982, when it was closed under a Court Order obtained by the State. The company's on-site storage practices resulted in an inventory beyond that needed to maintain recycling operations. Thus, when the company went into receivership, over 20,000 drums and 400,000 gallons of waste remained on-site. On one occasion, this excessive inventory resulted in an overflow of contaminated rainwater from a holding pond into an unnamed ditch that flows to Findley Creek, causing an oil sheen on Findley and Eagle Creeks. Some drums stored in the open and without an impermeable base deteriorated. In 1981, three organic solvents (1,1-dichloroethane, trichloroethene, and 1,1,1-trichloroethane) were found in on-site wells.

Site Updates | Latest Update || Five-Year Reviews

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Site Updates

April 2013

May 2013  The U.S. Environmental Protection Agency has completed five-year review of the Envirochem Superfund site at 865 S. State Road 421 near Zionsville. The Superfund law requires regular checkups of sites that have been cleaned up – with waste managed on-site – to make sure the cleanup continues to protect people and the environment. This is the third five-year review of this site.

The EPA’s cleanup of the site included soil vapor extraction to remove volatile organic compounds; a multilayer cap to reduce water infiltration and minimize contact with contaminated materials; a groundwater collection and treatment system; long-term monitoring; and limits on use of and access to the site.

During the review, EPA checked the cap, collection and treatment systems, studied monitoring results and reviewed the site restrictions.   Based upon EPA’s review, the responsible parties for the site will be required to complete additional investigation and evaluations; select additional remedial measures.  These additional remedial measures may require an Explanation of Significant Differences or a Record of Decision Amendment.  Upon selection of the additional remedial measure, the responsible parties will complete construction and operate and monitor the remedy. The parties will also need to review institutional controls once the final remedy elements are established. 

More information is available at the Hussey-Mayfield Memorial Public Library, 250 N. Fifth St., Zionsville,

The review should be completed in April 2018.


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