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4. Place Treatment Sludge in Mine and Remove Liners From Treatment Ponds <br />The sludge collected in the Treated Water Settling Pond will be disposed of in either one of two ways: <br />1) mixed into a cement grout on site and disposed of in the mine in a designated azea or 2) taken to the <br />uranium mill with ore to be processed. The later disposal method is preferred as it allows for <br />maximum utilization of the resource; however, this option may not always be available. For <br />reclamation costing purposes, disposal in the mine is assumed. As discussed in Appendix H, the sludge <br />is expected to contain low levels of radionuclides and metals that do not require disposal as a <br />radioactive or hazardous waste. <br />The sludge volume is estimated to be approximately 19 cubic yazds as discussed in Appendix H. The <br />sludge will be slurried into a grout pump where cement will be added to form a cement grout that will <br />be pumped into the upper portion of the decline using the existing waterline. The grout will be placed <br />on top of or next to the ore pad material. The volume of slurried grout is expected to be about 40 cubic <br />yazds. The addition of cement and pumping of this material is expected to be $200 per cubic yazd <br />placed, resulting in an estimated cost of $8,000. <br />• After the sludge has been removed, the 60 mil liners in the Lined Untreated Water Pond, Treated <br />Water Settling Ponds, and Treated Water Ponds will cut into strips and hauled to a landfill or recycling <br />facility. Approximately, 7000 squaze feet of liner will be removed. The estimated unit cost of loading, <br />trucking and disposing of this material is $5,200. <br />The total for this task is $13,200. <br />5. Reclaim Ventilation Shafts and Power Drops <br />As explained in Section 15 of Exhibit D -Mine Plan, two ventilation shafts will be located in <br />Colorado. Up to five other shafts may be present in Utah, which will be permitted under a NOI to <br />Commence Small Mining Operations (i.e., 5 acres or less disturbance) with the Utah Division of Oil, <br />Gas and Mining. All new shafts will be grouted where they intercept aquifers so that they do not <br />provide a conduit for ground water flow. <br />~~ There aze a number of methods available for sealing a vent shaft at the surface including the use of <br />foam, concrete, metal, and/or combination thereof. Seal designs will be provided to the DRMS and <br />Whirlwind Mine June 07 E-5 <br />