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Show EPA Docket No. CERCLA-VDI-93-JO 3 In 1905 Utah Copper Company built a tailings impoundment north of Bingham Creek on property later acquired by Kennecott (hereinafter "Kennecott Tailings"). In 1914, Utah Apex a built south of Company tailings impoundment Bingham Creek on· 8. . property later acquired by ARCa (hereinafter "ARCa Tailings"). of the mills in Bingham Canyon were disposed impoundments while Utah Apex Company and Utah Copper Company were the respective owners of these properties. Sampling activities conducted by EPA in September 1992, at the Kennecott Tailings, revealed lead levels, ranging between 270 and 8400 mg/Kg. Sampling activities conducted at the ARea Tailings at the same time showed an average lead concentration of 6,244 mg/Kg with a, range of 1,800 to 5,OOO mg/Kg. Tailings fram of into these some ' Runoff events and flooding caused tailings to erode 9. from the Kennecott and ARCO'Tailings into Bingham Creek Channel. At present the channel flows inter.mittently due to localized a,torms and snow melt. However, this flow' in the channel has and will continue to transport fine-grained particles such as those In addition, a County particles present in the tailings. engineering study estimates that flow in a 100 year flood event This volume of would be approximately, 400 cubi'c feet per second. flow in the channel would transport significant volumes tailings related. material deposited in the channel. 10. Samp,ling and analyses performed by EPA and Kennecott independently have identifie lead, arsenic and other hazardous In July/August 1992, EPA collected 85 substances at the Site. samples from the Bingham Creek Channel between 4800 West and 3200 West and found lead and arsenic averaging 5,661 mg/Kg and 202 mg/Kg, respectively. The concentrations of lead ranged from 200 to 23,000 r.ng/Kg and the concentrations of arsenic ranged from 9 Similar levels of lead and arsenic- are found to 890 mg!Kg. progressively up the channel as demonstrated by samples collected Samples collected by EPA from 8600 South by Kennecott in 990. down channel through the Brookside Trailer Park also elevated lead. show , . ENPANGERMENT 11.. and Arsenic is chronically human carcinogen. 'Arsenic can be acutely poisonous and can be fatal if ingested or inhaled a in sufficient quantities by humans, livestock, and wildlife. Arsenic compounds are absorbed into the body primarily through inhalation or ingestion. Lead is a cumulative poison which can' cause neurologic, blood cell damage in humans. and Some lead compounds are kidney, also animal carcinogens adversely affecting the lungs and Children ,under the age of seven years are especially kidneys. sensitive to the effects of lead. -, 12. . |
