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RULE 4 PERFORMANCE STANDARDS <br />Upon completion of the hole, cuttings from the drill hole will be placed in the drill hole and the <br />site reclaimed. Some holes maybe left open and completed with piezometers, if they are needed <br />for ground water monitoring. The requirements of Section 4.07 will be met for each exploration <br />hole. See Section 2.04.4, Sealing of Exploration and Mine Holes, for further information in <br />regard to reclamation of exploration holes. <br />With the exception of possible piezometers to be installed in some of the drill holes for <br />groundwater quality and quantity monitoring, all equipment related to the exploration program <br />will be removed from the exploration area when it is no longer needed for exploration. <br />During the exploration program, minimization of surface disturbance and prompt reclamation <br />practices will be utilized to eliminate sedimentation problems and any disturbance of the present <br />hydrologic balance. Water bars and ditches will be built wherever needed. Also, water from <br />drilling operations will be contained on the drill site and allowed to evaporate thus eliminating <br />any off-site disturbance. <br />As discussed under Section 2.04.6, no acid-forming materials have been found to exist within the <br />mine plan or adjacent area. <br />A compilation of 1989-1997 Permit Area Coal Resource Confirmation/Exploration/Monitor <br />wells and Transfer of Permit Area Exploration Liability to NOI-X-95-109-05 status can be found <br />in Exhibit 6, Geological Information an Item #5. <br />Exploration taking place inside and outside of the permit area will be handled through the Notice <br />of Intent (NOI) procedures. Se the appropriate NOI for details for each program. <br />With the approval of Technical revision 50, all exploration holes located within the permit <br />boundary are transferred to NOI X-95-109-5 and are managed under Coal Exploration <br />procedures. <br />Wells drilled as an integral part of water monitoring plans identified in the PAP (Permit C-81- <br />019) and water supply wells (for mining purposes) are managed under this Permit C-81-019. <br />4.21.5 Requirements for a Permit <br />No coal will be removed or extracted by the proposed coal exploration other than occasional spot <br />coring. No coal will be removed or extracted for commercial sale during coal exploration. <br />4.22 Concurrent Surface and Underground Mining <br />Colowyo does not currently plan to have concurrent surface or underground mining activities; <br />therefore, the requirements of this Section are not applicable to this permit application. <br />Rule 4 Performance Standards 4-86 Revision Date: 4/2/18 <br />Revision No.: RN -07 <br />