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Fact Sheet
April 2009
Next Round of Chemical Oxidation Remediation to Begin, 10th Street Superfund Site, Columbus, Nebraska
INTRODUCTION
In late-April 2009, the U.S. Environmental Protection Agency (EPA) will begin the next round of chemical oxidation remediation of the 10th Street Superfund Site in Columbus, Nebraska. The activities will last approximately six weeks. The chemical oxidation remediation will be located in two areas: in a city parking lot located near 10th Street and 25th Avenue, and along 20th Street near 23rd Avenue.
The first round of chemical oxidation activities, completed in April 2007, occurred on 20th Street between 22nd and 24th avenues. The second round of chemical oxidation activities, completed in September 2007, occurred on 16th Street between 20th and 22nd avenues.
Three rounds of chemical oxidation activities were conducted at the One Hour Martinizing source area in September 2007; May 2008, and September 2008. The first round of injections at the city parking lot and the 20th Street location were repeated in September 2008. Sampling continues to be performed at regular intervals to monitor the concentrations of the contamination.
PLANNED WORK
The planned activities include drilling approximately 144 holes into the ground spaced approximately 5 feet apart. Once the holes are drilled, the chemical Permanganate will be injected into each hole. This chemical is a strong oxidizer which will neutralize the trichloroethylene (TCE) and tetrachloroethylene (PCE), which are in the contaminant plume that threatens Columbus' drinking water supply.
During these activities, EPA's contractor may have several workers and pieces of equipment in parking lots and streets as they move from hole to hole. EPA will work with the contractor to minimize any disruptions to the community, but there may be some times when traffic flow along the streets may be interrupted. We ask for your patience while we work to clean up the contaminant plume.
ADDITIONAL INFORMATION
Site-related documents provide details of the nature and extent of contamination and the work that has been completed at the 10th Street site. These documents are part of the Administrative Record File, available during normal business hours at the following locations:
Columbus Public Library
2504 14th St.
Columbus, Nebraska
EPA Region 7
Records Center
901 N. 5th Street
Kansas City, Kansas
If you have questions or need additional information, please contact:
Fritz Hirter
Community Involvement Coordinator
EPA, Region 7,
Office of Public Affairs
901 N. Fifth St.
Kansas City, Kansas 66101
913-551-7130
Toll-free 1-800-223-0425
E-mail: hirter.fritz@epa.gov