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U.S. EPA ISSUES CLEANUP ORDER FOR TUCSON AIRPORT SUPERFUND SITE

U.S. EPA ISSUES CLEANUP ORDER FOR TUCSON AIRPORT SUPERFUND SITE
 SAN FRANCISCO, July 9 /PRNewswire/ -- The U.S. Environmental Protection Agency (U.S. EPA) today issued an administrative order requiring the city of Tucson, the Tucson Airport Authority, General Dynamics Corp. and McDonnell Douglas Corp. to investigate soil contamination on or near the airport property and analyze potential cleanup remedies. Although the U.S. Air Force is not receiving the order at this time, U.S. EPA expects the U.S. Air Force to help fund the work.
 "Unfortunately, we were unable to agree on the final language for a settlement document regarding this portion of work at the site," said Jeff Zelikson, U.S. EPA's regional hazardous waste management division director. "This U.S. EPA order establishes the working relationship between the agency and the parties who will investigate the contaminated soil. U.S. EPA looks forward to the continued cooperative efforts on the part of the city of Tucson and other parties at this site."
 Under the order, a remedial investigation (RI) will be conducted to determine the nature and extent of soil contamination and a feasibility study (FS) will be conducted to explore all the cleanup remedy options. The order requires that the investigation of contamination problems begin immediately and it is expected to take about two years to complete. Upon completion of the investigation and a public comment period, U.S. EPA will select a cleanup action for the airport property.
 The investigation will be conducted under U.S. EPA oversight. The Agency will demand payment of all past and oversight costs.
 In earlier actions concerning contaminated groundwater at the overall Superfund site, agreements have been reached to build and operate four groundwater extraction and treatment systems. Two of these systems have already begun operation. The first groundwater treatment system, financed by the U.S. Air Force, began operation in April 1987. Burr-Brown Corp. financed the second system which began operation in January of this year. Certain components of the third groundwater treatment system for the portion of the site known as "Area A" are currently under construction and the entire system should begin operation in early 1994. U.S. EPA is completing negotiations with the Air National Guard for design and construction of the fourth system to treat contaminated water beneath their facility.
 The Tucson International Airport Area is located in Pima County in southwestern 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 to nearby populations through actual or potential contamination of groundwater, surface water or air.
 -0- 7/9/92
 /CONTACT: Lois Grunwald of the U.S. EPA, 415-744-1588/ CO: U.S. Environmental Protection Agency ST: California IN: SU:


MC -- SF007 -- 8040 07/09/92 17:18 EDT
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Publication:PR Newswire
Date:Jul 9, 1992
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