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Koppers Co., Inc. (KCI) Superfund Site
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Koppers Co., Inc. (KCI) Superfund Site : ウィキペディア英語版
Koppers Co., Inc. (KCI) Superfund Site

The Koppers Co., Inc. (KCI) Superfund Site is one of three Superfund sites in Oroville, California, along with Louisiana Pacific Sawmill and Western Pacific Railyard. The KCI Superfund Site is a 200-acre site which served as a wood treatment plant for 50 years.〔(【引用サイトリンク】title=Brownfield Still Harbors Toxins in South Oroville )〕 Wood was treated with many chemicals to prevent wood deterioration. The accumulation of these chemicals from spills, fires, and uses has caused this site to be contaminated with hazardous waste material. Due to soil and groundwater contamination, this site is was placed on the National Priorities List in 1984 for remedial action plans to clean up the site to protect surrounding residential areas concerning environmental and human health risks.〔http://www.epa.gov/superfund/sites/fiveyear/f2008090002698.pdf〕
== Origins of the site ==

The KCI Superfund site was originally a mining operations in the 1900s. The Hutchinson Lumber Mill operated from 1920 to 1948. In 1955, Koppers Co., Inc purchased the property from National Wood Treatment Company. Koppers later sold the company to Beazer East, Inc which then later re-sold it to Koppers Industries, Inc. who closed down the wood treatment facility in 2001. Beazer East, Inc again bought out the company and sold the land with its contaminated soils into two landfills to Gold Line Express Inc. Beazer East Inc. is known to be the responsible party for the outcome of the site.〔
From 1948 to 2001, the Oroville Plant conducted wood treatment operations to prevent wood from deteriorating. In 1963, an on-site fire released 20,000 gallons of pentachlorophenol (PCP) from tanks onto the soil. Another fire was documented in 1987 releasing high levels of dioxins. With many orders and remedial actions to clean up the site, KCI Superfund Site is under monitored recovery to clean the affected groundwater and soil contamination. The goal is to return the original source of groundwater to the 10,650 people living in the surrounding area.〔〔(【引用サイトリンク】title=Superfund Site Overview Koppers Co., Inc. (Oroville Plant), Pacific Southwest, US EPA )

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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