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Show EPA Docket No. CERCLA-Vm-93-lO 3 1905 Utah Copper Company built a tailings north of Eingham Creek on property later acquired by Kennecott (hereinafter '''Kennecott Tailings"). In 1914, Utah Apex Company built a tailings impoundment south of Bingham Creek on 8. In impoundment later acquired by ARca (hereinafter "ARca Tailings") from some of the mills in 'Bingham Canyon were disposed of into these 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 ARca Tailings at the same time showed an average lead concentration of 6,244 mg/Kg with a range of 1,800 to 15,000 mg/Kg. property Tailings . 9. Runoff events and flooding caused tailings to erode from the Kennecott and ARea Tailings into Bingham Creek Channel. At present the channel flows intermittently due to localized storms and snow meie. 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. in a 100 year flood event flow estimates that engineering study This volume of would be approximately 400 cubic feet per second. flow in the channel would transport significant volumes tailings related material deposited in the channel. Sampling and analyses performed by EPA and Kennecott independently have'identified lead, arsenic and other hazardous In July/August 1992, EPA collected 85 substances at the Site. from ,the Creek Channel between 4800 West and 3200 samples Bingham West and found lead and arsenic averaging ,5,661 mg/Kg and 202 The concentrations of lead ranged from 200 mg/Kg, respectively. to 23,000 mg/Kg and the concent.r'at.Lons of arsenic ranged from 9 to 890 mg/Kg. Similar levels of lead and arsenic are found the channel as demonstrated by samples collected up progressively by Kennecott in 1990. Samples collected by EPA from 8600 South 10. down channel through elevated lead. the Brookside Trailer Park also show ENDANGERMENT 11. Arsenic is a human carcinogen. Arsenic can be acutely chronically poisonous and can be fatal if ingested or inhaled in sufficient quantities by humans, livestock, and wildlife. Arsenic compounds are absorbed into the body primarily through inhalation or ingestion. and 12.' 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. / |
