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<br />energy fuels nuclear, inc. <br />s III IIIIIIIIIIIIII III <br />999 <br />three park central • suite 900 <br />1575 arapahoe street • denver, cobrado 80202 <br />September 12, 1996 •. ~. . <br />VIA HAND DELIVERED <br />Mr. H. Bruce Humphries <br />Minerals Program Supervisor <br />State of Colorado <br />Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />nr-rCIV~D <br />Std' 1 ~ 1996 <br />Division of i~~in~ar~ls ~ Geology <br />Re: DMO Determination -West Sunday Ivtine -Permit No. M-81-021 <br />and Sunday Mine -Permit No. M-77-285 <br />Deaz Mr. Humphries: <br />,, <br />303.623-8317 <br />M~x 910.931-2561 <br />fex 303.595.0930 <br />A field investigation to chazacterize average uranium content of waste rock amd low-grade <br />ore was requested by the Division of Minerals and Geology ("Division") in a letter to Energy <br />Fuels Nucleaz, Inc. ("EFN") dated August 16, 1996. As follow-up to our meeting with the <br />Division on September 5, 1996, EFN proposes the following approach to conducting field work <br />at the Sunday and West Sunday Mines. <br />- iJsing a calibrated probe which measures beta and gamma emissions, take measurements <br />at 100-foot grid spacings on the Sunday and West Sunday Mine dumps (see attached <br />maps). <br />- The probe will be field-calibrated to a known ore standazd, so measurements will be <br />convertible to ore percent uranium values. <br />- Collect QAlverification samples, at the rate of one per 20 sampling points, for analysis <br />for volumetric uranium content by an independent contract laboratory. <br />Survey methods aze a common approach to field determination of radioactive materials <br />content or activity in rocks or soil. Of course, the precise details of the survey, such as <br />instrument used for detection and spacing of measurement locations, are site-specific. However, <br />we include three documents describing survey approaches for your information. Surveys aze used <br />in a wide range of applications, from simple background surveys at mining properties, to very <br />extensive surveys at licensed facilities. <br />The Wyoming Department of Environmental Quality, Land Quality Division <br />(WDEQ/LQD) has published a guideline for performing radiological surveys which mine <br />operators aze encouraged to perform, to establish the nature of the pre-mining radiological <br />environment. These data are also used to help establish appropriate reclamation goals. A copy <br />