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JD -6 Mine Environmental Protection Plan 6 <br />Data Sheets (MSDSs) for fuel oil, lubricants, welding gases, and other products used at the JD -6 Mine are <br />available at Cotter's Western Slope office at 28151 DD Road in Nucla, Colorado. <br />5.3 Potentially Toxic - Forming Materials <br />The waste rock and ore at the JD -6 Mine are considered by DRMS to be potentially toxic - forming <br />materials. Native rocks that are not mined are not considered potentially toxic - forming materials for the <br />purpose of this EPP. <br />5.3.1 Ore <br />5.3.1.1 Source <br />The ore is derived primarily from the Salt Wash Member of the Morrison Formation, which consists of <br />interbedded fine- grained sandstone and mudstone. The uranium and vanadium mineralization occurs in <br />Third Rim Sandstone of the Salt Wash Member, with an average ore thickness of 3.75 feet at the JD -6 <br />underground mine. <br />The mineralization at JD -6 Mine is similar to the rest of the Uravan Mineral District. Uranium occurs <br />primarily in the form of uraninite (pitchblende variety UO2) with traces of coffinite (USiO4OH) filling in <br />the pore space between individual sand grains (Peters, 2011). The uraninite (pitchblende) occurs as a more <br />massive, darker colored mineral (Nininger, 1954). When oxidized, these minerals may become much <br />brighter in color and reveal secondary minerals such as corvusite, dravite, and pascoite (Peters, 2011). <br />These oxidation minerals are often seen in conjunction with uraninite within the Uravan Mineral District. <br />The primary vanadium mineral is montroseite (VOOH) in conjunction with vanadium clays and hydromica. <br />Carnotite and tyuyamunite are also commonly seen vanadium minerals after oxidation of the ore occurs. It <br />is possible that other oxidized vanadium minerals occur on the JD -6 Mine site. The presence of other <br />cations, increased moisture levels, and differing pH levels may enable other vanadium oxides to form over <br />time (Peters, 2011). <br />5.3.1.2 Quantity <br />When the JD -6 Mine is operating, ore from the JD -6 underground workings will be transported to the <br />temporary ore stockpile on the clay -lined ore transfer pad to be constructed on the Mineral Joe property. <br />No temporary or permanent ore storage is planned on the JD -6 Mine permit area surface. <br />5.3.2 Waste Rock <br />5.3.2.1 Source <br />Waste rock derived from the JD -6 underground mine consists of the Salt Wash Member of the Morrison <br />Formation, which consists mostly of mudstone and shale with interbedded sandstone. <br />5.3.2.2 Quantity <br />The external waste rock pile at the JD -6 Mine has been fully constructed and contains approximately <br />25,000 compacted cubic yards of rock. Future waste rock generated by underground mining at the JD -6 <br />Mine will be gobbed underground in dry areas of the mine, and will not be placed at the surface. The <br />volume of waste rock gobbed underground will be dependent on the available void space and the extent of <br />new development underground. <br />4148A.120927 Whetstone Associates <br />