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<br /> <br />~II ~II~I~~I~~~~~ ~I~ <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman Sl., Room 215 <br />Denver, Colorado 8020] <br />Phone:13031 866-3567 <br />FAX: (30~~7Ly81~ r 1994 <br />Mr. Wayne Tatman <br />Colina Oro Molino, Inc. <br />9145 Sunshine Canyon <br />Boulder, Colorado 80302 <br /> <br />STATE OF COLORADO <br />II~~~ <br />DEPARTMEIJT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5. Lochhead <br />E~ecmive Director <br />RE: Gold Hill Mill, Permit No. M-83-141 - Characterization o~ie0er~~EOF <br />from the Mogul (Woods vein and Mule vein) Tunnel, Bould®1Lrs~o~U~rec~nr <br />County <br />Dear Mr. Tatman: <br />The following mineralogical and chemical information has been <br />received by the Division concerning potential ores to be processed <br />at the Gold Hill Mill: <br />DATE RECEIVED DESCRIPTION <br />6/23/94 Spectrophotometric analyses of Mogul Tunnel <br />(Woods vein) heads, tails and sample from the <br />the tailings impoundment <br />6/24/94 Letter discussing the Mogul Tunnel ore <br />mineralogy from Tim Hartley, Durango Metals <br />6/30/94 Spectrophotometric analyses of the heads and <br />tails of the Mule vein ore from the Mogul <br />Tunnel <br />After reviewing this information, the Division has several concerns <br />will need additional data concerning the mineralogical and chemical <br />characterization of the ore. These concerns are detailed beolow. <br />Mineralogy <br />The mineralogy summarized in the letter will need to be <br />substantiated with either copies of published literature or <br />petrographic analyses completed a representative sample. The <br />Division will need an estimated total sulfide mineral content as <br />well as estimates of indiviual sulfide mineral percentages. <br />Chemical Composition <br />Please find a copy of the surface and ground water quality tables <br />from the Colorado Department of Health. The Division will require <br />that the regulated elements in these tables be analyzed by methods <br />that provide detection limits at least as low as the maximum <br />