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U.S. EPA ANNOUNCES SOIL PILOT STUDY AT KOPPERS SUPERFUND SITE

 SAN FRANCISCO, Sept. 15 /PRNewswire/ -- The U.S. Environmental Protection Agency (U.S. EPA) today announced Beazer East Inc. will conduct a pilot study to remove soil contamination at the Koppers Superfund site, Oroville, Calif.
 The purpose of the pilot study is to demonstrate the effectiveness of soil washing technology in cleaning up contaminated soil at the Koppers site. The study, which begins this week, will be conducted in two stages. In the first stage, approximately 6,000 tons of soil will be sorted and separated to remove larger rocks and debris. This larger material will be stored under plastic outside the soil storage building located on the site. The soil remaining after the separation will all be placed inside the soil storage building.
 In the second stage, about 600 tons of the stored soil will be washed using detergent and water. The soil washing treatment equipment will be installed in October; however, the actual washing stage will take about two weeks and end in early November. During this stage, U.S. EPA and Beazer will hold an open house for community members who would like to visit the site and see the work in progress.
 The larger rocks and debris will remain under plastic to prevent erosion, dispersion and wind blown dust that might affect nearby residences. Future treatment studies will determine the cleanup action for this material. The washed soil will be returned to the soil storage building and placed in a separate area.
 The soil washing project is the latest of cleanup actions taken at Koppers. Last April, the first of two groundwater treatment plants began operating. Construction of the second plant is scheduled to begin in October and is designed to contain any further migration of contaminants from the Koppers property, while the groundwater is being cleaned up.
 Other soil cleanup technologies planned for the site include bioremediation and chemical fixation to treat the contaminated soil. Construction of the bioremediation test plots will begin in October. A concrete drip pad and cap have been installed in the wood-treating area to prevent further soil and groundwater contamination.
 The Koppers site is located just south of Oroville near State Route 70. Wood treating operations, designed to prevent wood deterioration by insects or fungi, have been used at the site since 1948 when the National Wood Treating Co. first began operating. Koppers Industries Inc. is the current owner and operator of the Oroville property and wood treatment facility. The former owner was Koppers Co. Inc., which was acquired by Beazer East Inc. in 1988.
 Chemical handling procedures, wood treatment and storage operations resulted in soil and groundwater contamination. The groundwater, surface water and soils have been contaminated with polynuclear aromatic hydrocarbons (PAHs) and pentachlorphenol (PCPs), dioxins, chromium and arsenic.
 In 1984, the Koppers site was added to the National Priorities List (NPL). The NPL is the list of uncontrolled hazardous waste sites nationwide which pose the greatest threat to human health and the environment. Sites on the NPL qualify for federal long-term cleanup efforts.
 -0- 9/15/93
 /CONTACT: Dave Schmidt of the U.S. EPA, 415-744-1578/


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

PK-TM -- SF007 -- 2285 09/15/93 13:41 EDT
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Publication:PR Newswire
Date:Sep 15, 1993
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