Second Round of Chemical Oxidation Remediation to Begin, 10th Street Superfund Site, Columbus, Nebraska
On August 13, 2007, the U.S. Environmental Protection Agency will begin the second round of chemical oxidation remediation of the 10th Street Superfund Site in Columbus, Nebraska. The activities will last approximately one month and will be located generally in the area of 15th or 16th streets between 20th and 23rd avenues. The first round of chemical oxidation activities, which was completed in April 2007, occurred on 20th Street between 22nd and 24th avenues. Sampling will be performed at regular intervals to monitor the concentrations of the contamination.
The planned activities are to drill approximately 118 holes into the ground spaced approximately 5 feet apart. Once the holes are drilled, a chemical called Permanganate will be injected at depth into each hole. This chemical is a strong oxidizer which will neutralize the trichloroethylene (TCE) and tetrachloroethylene (PCE), both of which are in the contaminant plume that threatens the drinking water supply for Columbus.
During these activities, EPA's contractor may have several workers and pieces of equipment along the street as they move from hole to hole. We will work with the contractor to minimize any disruptions to the community, but there may be some times when traffic flow along the street may be interrupted. We ask for your patience while we work to clean up the contaminant plume.
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.
If you have questions or need additional information, please contact:
Community Involvement Coordinator
EPA, Region 7,
Office of Public Affairs
901 N. Fifth St.
Kansas City, Kansas 66101