EPA Renews Hazardous Waste Injection Control Permits
Chicago, IL— U.S. Environmental Protection Agency Region 5 has renewed underground injection control permits for two commercial hazardous waste injection wells owned by Environmental Disposal Systems Inc. in Romulus, Michigan. The original permits were issued in April 1998 and expired in October 2003.
The permits allow EDS to dispose of liquid waste by injecting it into the two wells. The waste will include diluted acids, spent solvents and landfill drainage as well as a variety of nonhazardous materials. The average daily volume of waste injected will be approximately 240,000 gallons and the maximum injection pressure allowed will be 765 pounds per square inch.
New conditions in the permits include changes to the waste analysis plan, the injection rate and pressure, the plugging plan, and limitations on the injection of several kinds of hazardous waste. These conditions were added to reflect more precise information known about the wells after they were constructed and to make the permits consistent with the recently approved exemption to the federal ban on the land disposal of hazardous waste.
EPA reviewed and responded to 118 comments on the draft permits. In response to one of the comments, EPA requested additional computer modeling by EDS to consider that the layer of underground rock confining the waste thins significantly about 45 miles to the northeast of the wells. The additional modeling confirmed that the area of review is appropriate, that is, it is large enough that pressure beyond the area is too low to force injected waste up into sources of drinking water through any conduit, such as an old unplugged well. EDS was required to show that there were no known conduits within the area of review. Therefore, no changes to the permits were required.
The permits, a summary of responses to comments received, the index of the administrative record and other documents related to the EDS wells are available for review at the following libraries: Eshleman Library, Henry Ford Community College, Dearborn, Romulus Public Library, and Taylor Community Library. A more extensive record is available for review at EPA regional offices in Chicago.
To read the permits, other official documents and for more information about EPA’s underground injection control program, visit EPA’s website at www.epa.gov/r5water/uic/uic.htm.