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Section 1 <br />Introduction <br />Colorado regulations in HRMMR §6.4.20(1)(c) set forth the various types of mine facilities that <br />require specific evaluation for the presence of designated chemicals and acid- or toxic-forming <br />materials. Exhibit 1-1 summarizes these specified facilities in relation to actual facilities present <br />at the Sunday Mines Group. <br />Exhibit 1-1. Summary of the Status of Svecified Facilities at the Sunday Mines Group. <br />Specified Facilities Facility Status <br />Leach facilities, or heap leach pad Not Present <br />Tailings storage or disposal areas Not Present <br />Impoundments Not Present <br />Waste rock piles Present <br />Stock piles, temporary or permanent Present <br />Land application sites Not Present <br />z <br />Only waste rock piles (development rock stockpiles) and temporary ore stockpiles are present <br />at the Sunday Mines Group. Development rock is rock that must be excavated to facilitate mine <br />development, but that does not contain adequate metals content to constitute ore. Development <br />rock piles are located at each of the individual mines that compose the Sunday Mines Group. <br />Ore is rock that contains sufficient uranium and vanadium to warrant processing at the Denison <br />mill in Blanding, Utah. Temporary ore stockpiles are currently located at the Sunday, St. Jude, <br />West Sunday, and Topaz mines; the temporary stockpiles are typically transported to the mill <br />on a daily to weekly basis. <br />• Exhibit 1-2 summarizes the various mine facilities that are examined in this investigation. All of <br />these facilities are pre-existing mine facilities as referenced in HRMMR §6.4.20(1)(d). <br />Exhibit 1-2. Mine Facilities Evaluated in this Investigation. <br />Mine Facility Status Approximate <br />Acreage <br />Sunday Mine Low Grade Ore Stockpile Active pre-existing facility 2.7 <br /> Development Rock Stockpile Active pre-existing facility 7.8 <br /> Temporary Ore Stockpile Active pre-existing facility 0.1 <br />Carnation Mine Development Rock Stockpile Inactive pre-existing facility 3 <br />St. Jude Mine Development Rock Stockpile Active pre-existing facility 4.3 <br /> Temporary Ore Stockpile Active pre-existing facility 0.1 <br />West Sunday Mine Development Rock Stockpile Active pre-existing facility 3.5 <br /> Temporary Ore Stockpile Active pre-existing facility 0.1 <br />Topaz Mine Development Rock Stockpile Active pre-existing facility 1.9 <br /> Temporary Ore Stockpile Active pre-existing facility 0.1 <br />1.3 Land Uses in Area of Mines <br />The post-mining land uses at the Sunday Mines Group are established in the U.S. Bureau of <br />Land Management (BLM) Management Plan for the area (San Juan Public Lands Draft <br />cm 1-3 <br />TA64986-Denison Mines\Task Order 3. DMO Sampling and Analysis Plan\Task 3.12. Soil, Ore, Rock Data Assessment RepMlSunday Rack Repor6final reportkReportTinal Sunday Mines Group Soil Ore Rock <br />Data Assessment Report 051599.doc