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Show " 3 EPA Docket No. CERCLA-VDI-93-10 Copper Company built a tailings Bingham Creek on property later acquired by In 1914, Utah Apex Kennecott (hereinafter ·Kennecott Tailings"). Company built a tailings impoundment south of Bingham Creek on· property later acquired by ARCO (hereinafter "ARCa Tailings") 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 In 1905 8. Utah north of impoundment . at the mg/Kg same with a time showed an average lead concentration of 6,244 range of.l,SOO to 15,000 mg/Kg. 9. Runoff events and flooding caused tailings to erode from the Kennecott and ARCO Tailings into Bingham Creek Channel. At present the channel flows intermittently due to localized storms 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. flow in a 100 year flood event 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. " 10 Sampling and analyses prfor.med by EPA and Kennecott independently have identified lead, arsenic and other hazardous In July/August 1992, EPA collected 85 substances at the Site. from Creek Channel between 4800 West' an 3200 the Bingham samples West and found lead and. arsenic averaging 5,661 mg/Kg and 202 mg/Kg, respectively. The concentrations of Lead zanqed from 200 to 2.3, 000 mg/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 1990. down channel through the Brookside Trailer Park also show elevated lead. ' ENDANGERMENT .. l. Arsenic is a human carcinogen •. Arsenic. can be acutely and 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 nhalation or ingestion. Lead is a cumulative poison which can cause neurologic, and blood cell damage' in humans., Some lead compounds are kidney, also animal carcinogens adversely affecting the lungs and 12. Children.under the age of seven years are especially kidn7Y. sens1t1ve to the effects of lead. |
