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U.S. EPA ANNOUNCES HASSAYAMPA SUPERFUND CLEANUP DECISION

 U.S. EPA ANNOUNCES HASSAYAMPA SUPERFUND CLEANUP DECISION
 SAN FRANCISCO, Aug. 7 /PRNewswire/ -- The U.S. Environmental Protection Agency (U.S. EPA) today announced a plan to clean up soil and groundwater contamination at the Hassayampa Landfill Superfund site, Maricopa County, Ariz.
 "This action will significantly contribute to the achievement of U.S. EPA's ultimate objective in this project: protection of the health and environment of the citizens who live in the vicinity of this Superfund site," said Jeff Zelikson, U.S. EPA's regional hazardous waste management division director. "This decision was made after careful consideration of all the alternatives and a thorough review of the public's comments."
 Estimated cost for implementing this remedy is $6.1 million. U.S. EPA is in the process of initiating negotiations with the companies whose wastes were brought to the site. The purpose of these negotiations is to reach a settlement under which these companies agree to finance and implement the remedy.
 The plan for cleaning up the contaminated groundwater calls for installing extraction wells, pumping out the groundwater, and treating it in an air stripping process. The treated water will be reinjected into groundwater in the vicinity of the site, and groundwater will be monitored to measure the effectiveness of the remedy.
 U.S. EPA's plan also involves removing contaminated gas present in the soil by a soil vapor extraction process. The contaminated gas will be treated on site using carbon adsorption or another suitable technology. A protective cover or landfill cap will be placed over the hazardous waste portion of the landfill. Access and deed restrictions will also be placed on the site. Additional investigation will also be performed to more fully define the extent of contamination at the site.
 The Hassayampa Landfill Superfund site is located in a rural desert area about 40 miles west of Phoenix. Since 1961, Maricopa County has operated Hassayampa as a solid-waste landfill. During an 18-month period between April 1979 and October 1980, hazardous waste was disposed of in a 10-acre area in the northeast section of the landfill under a program administered by the Arizona Department of Health Services (ADHS). During this time, about 3.3 million gallons of liquid hazardous waste and 4,000 tons of solid hazardous waste were disposed of at the landfill.
 The Hassayampa Landfill was placed on U.S. EPA's National Priority List (NPL) in 1987. 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- 8/7/92
 /CONTACT: Paula Bruin of U.S. EPA, 415-744-1587/ CO: U.S. EPA ST: California IN: SU:


JL -- SF011 -- 8088 08/07/92 14:48 EDT
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Publication:PR Newswire
Date:Aug 7, 1992
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