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RULE 4 PERFORMANCE STANDARDS <br />4.07 Sealing of Drilled Holes and Underground Openings <br />4.07.1 General Requirement <br />Each exploration hole, or other bore hole well or other exposed underground opening encountered during <br />surface mining, will be cased, sealed,. plugged, or otherwise managed to meet the requirements of this <br />Section and described more fully in Section 2.05.4. <br />Holes used for surface blasting will not be included under the requirements of this Section. <br />4.07.2 Temporary Sealing <br />Each exploration hole or other drill or bore hole described in this Section will be protected, inspected and <br />maintained according to this Section. This performance is described more fully in Section 2.02 and 2.05.4 <br />of this application. <br />4.07.3 Permanent Sealing <br />Drilled holes no longer needed for monitoring or other approved uses will be backfilled and sealed as <br />described in this Section. This performance is described more fully in Sections 2.02 and 2.05.4 of this <br />application. <br />4.07.4 Abandonment in Designated Groundwater Basins <br />This subsection is not applicable to the Colowyo mining plan. <br />Exploration taking place inside and outside of the permit area will be handled through the Notice of Intent <br />(NOI) procedures. See the appropriate NOI for details for each program. <br />With the approval of Technical revision 50, all exploration holes located within the permit boundary are <br />transferred to NOI X-95-109-5 and are managed under Coal Exploration procedures. <br />Wells drilled as an integral part of water monitoring plans identified in the PAP (Permit C-81-019) and <br />water supply wells (for identified in the PAP (Permit C-81-019) and water supply wells (for mining <br />purposes) are managed under this Permit C-81-019. <br />Rule 4 Performance Standards 4.07-1 Revision Date: 6/23/08 <br />Revision No.: MR-91