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EPA HOSTS PUBLIC MEETING ON TUCSON SUPERFUND PIPELINE ROUTE

 SAN FRANCISCO, May 14 /PRNewswire/ -- The U.S. Environmental Protection Agency (U.S. EPA) will host a public availability session on Wednesday, May 19, 1993, to discuss a proposed pipeline route as part of the cleanup of trichloroethylene (TCE) contaminated groundwater at the Tucson International Airport Area Superfund site, Pima County, Ariz. EPA staff will be available 6-8 p.m. at the El Pueblo Neighborhood Center, Building A, 175 W. Irvington Rd., Tucson, Ariz.
 The proposed route would carry contaminated groundwater from five wells in southeast Tucson to a treatment plant which is being built in Tucson's Irvington Yard. The proposed route runs for much of its length along the Airport Wash.
 The route was proposed by the U.S. Air Force, the Tucson Airport Authority, the City of Tucson and Hughes Aircraft Co. Before proposing this pipeline route, the four parties, known as the TARP steering committee, went door-to-door in the neighborhood along the Airport Wash route to provide information and answer questions. They also kept elected officials updated on the status of the project.
 TARP also provided monthly updates to the Pima County Board of Health's TCE subcommittee, an interagency and community association that was formed to address issues related to the TCE contamination. The TCE subcommittee supports this route.
 U.S. EPA also has held several community meetings in the past year to provide information on all proposed pipeline routes. U.S. EPA's goal is to maintain as normal a level of access as possible to business, homes and services during construction no matter which route is finally selected and to otherwise minimize the impact of the construction.
 Once the pipeline route has been selected and built, it will carry TCE-contaminated groundwater from southeast Tucson to the treatment plant that is expected to be completed by mid-1994. The system is designed to remove volatile organic compounds such as TCE from the groundwater through a process called air stripping. The treatment plant will clean the water to a TCE level of 1.5 micrograms per liter, a level even more stringent that the federal drinking water standard of five micrograms per liter. Air emissions from the treatment plant will be virtually eliminated by the use of carbon filters.
 The Tucson International Airport Area is located in Pima County in southeastern Arizona. The site encompasses sections of southwest Tucson, as well as adjoining lands south of the city. It includes industrial, commercial, residential and undeveloped property. The site was placed on the U.S. EPA National Priorities List (NPL) in 1983 after organic compounds seeped into and contaminated the groundwater as a result of certain waste disposal practices at and around the Tucson International Airport.
 The NPL is U.S. EPA's list of hazardous waste sites potentially posing the greatest long-term threat to public health and the environment. U.S. EPA identifies and ranks NPL sites according to threats t of groundwater, surface water or air.
 -0- 5/14/93
 /CONTACT: Paula Bruin of the U.S. EPA, 415-744-1587/


CO: U.S. Environmental Protection Agency ST: Arizona IN: ENV SU:

SG-TM -- SF011 -- 8832 05/14/93 17:26 EDT
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Publication:PR Newswire
Date:May 14, 1993
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