| OCR Text |
Show EPA Docket No. CEltCLA-VDI-93-10 3 In 1905 Utah Copper Company built a tailings of Bingham Creek on property later acquired by Kennecott (her.einafter "Kennecott Tailings n). In 1914, Utah Apex built a south of Company tailings impoundment Bingham Creek on· 8. impoundment north . ,property later acquired by ARca (hereinafter "ARCa Tailings") of the mills in Bingham Canyon were disposed tmpoundments 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 15,000 mg/Kg. Tailings from of into these . some Runoff events and flooding caused tailings to erode 9. from the Kennecott and ARca 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 eo 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 would'be approximately 400 cubic feet per second. This volume of flow in the channel would transport significant volumes tailingsrelated material deposited in the channe.l - , 10. Sampling and analyses perfor.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 Singham Creek Channel between 4800 West- and 3200 West and found lead and arsenic averagin.9 5,661 mg/Kg and' 202 mg/Kg, respectively. The conentrations 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 Samples collected by EPA from 8600 South by' Kenn'ecott in 1990. . down .channel through the Brookside Trailer elevated lead. Park also 'show ENDANGERMENT 1. 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 inhalation . 1.2. kidney, or ingestion. Lead is a cumulative poison which can cause neurologic, and blood cell damage in humans. Some lead compounds are also animal carcinogens adversely affecting the Children under the age of seven years kidneys. sensitive to the effects of lead. lungs and are especially ' |
