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Show 3 EPA Docket No. CERCLA-VDI-93-10 Utah Copper Company built a t·ailings of Bingham Creek on property later acquired by north impoundment In 1914, Utah Apex Kennecott (hereinafter -Kennecott Tailingn). Creek on. south of built a Bingham tailings impoundment Company ·8. In 1905 property later acquired by ARCO (hereinafter "ARea Tailings·) . 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 a the ARca Tailings same at the te showed an average lead concentration of 6,244 Tailings from of into these some of mg/Kg with a range of.l,800 to 15,000 mg/Kg. tailings to erode 9. Runoff events and flooding caused Creek Channel. into and ARca from the Kennecott Bingham Tailings to localized due flows channel At present the intermittently 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. engineering study estimates that· flow in a 100 year flood event This volume of would be approximately 400 cubic feet per second. vol.umes flow in the channel would transport significant 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. samples from the Bingham Creek Channel between 4·800 West and 3200 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 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 West Kennecott in 1990. Samples collected by EPA from 8600 South down channel through the Brookside Trailer Park also show elevated lead. by ENDANGERMENT 11. 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 .lation or ingestion. -3.2. kidney, neuro'logic, I;ead is a cumulative poison which can cause and blood cell damage' in humans.. Some lead compounds also animal kidneys. carcinogens adversely affecting the lungs and Children ,under the age of seven years are especially sensitive to the effects of lead. are |
