Laserfiche WebLink
t • ARR for ESUClimar <br /> A URS Operating Services,Inc. <br /> �t START,EPA Resion Vill Revision: 0 <br /> t ,e Contract No.68-w;-0031 Date: 04/1998 <br /> Paae 7 of 37 <br /> Results Report(ARR)completed by URS in 1994. Sodium cyanide,dimethyl sulfoxide, lime,vapor oil,pine <br /> oil and sodium hydroxide are used in the flotation and mineral recovery process at the CNt site and are <br /> potentially present in waters discharged from the NPDES discharge point on Tenmile Creek(CNiC 1993). <br /> TABLE 1 <br /> Source Characterization Samples From 1994 SSI <br /> Anal to Ranae of Concentration mafka m) <br /> Aluminum 1,730-29,600 <br /> Arsenic 0.20-601 <br /> Cadmium 0.47 ND* -2.5 <br /> Chromium 3.0-63.4 <br /> Copper 18.0-304 <br /> Lead 11.4-50,900 <br /> Mercury 0.05 ND*-0.53 <br /> Selenium 0.17 ND* - 1.7 <br /> Silver 0.69 ND*-279 <br /> Zinc 44.7- 1,020 <br /> mglkg=micrograms per kilogram <br /> ppm=parts per million <br /> .ND=Non-detect at the concentration listed to the left. <br /> Source: URS 1994 <br /> Approximately 2,800 acres of mine tailings ponds and associated mine tailings, or approximately <br /> 460 million tons of tailings, are located at the headwaters of the Eagle River and Tenmile Creek <br /> (CMC 1993; USGS 1970a). <br /> The CM site is permitted to discharge a maximum of 9,000 gallons per minute(GPM),or 20 cfs into <br /> Tenmile Creek(CDPHE-WQCD 1988).. The discharge point for the site NPDES permit is at the <br /> northwest outlet of the Mayflower Treatment Pond,which is.also the headwater for Tenmile Creek <br /> (Figure 1). <br /> 75-51119.00 <br /> F:\START\CLIMAXX\Final.ARRICLIMAX.TXT.wpd:bas <br />