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RULE 4 PERFORMANCE STANDARDS <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 />4.08 Use of Explosives <br />4.08.1 General Requirements <br />Colowyo will comply with all applicable State and Federal laws in the use of explosives. <br />Colowyo will conduct all blasts that use more than five pounds of explosives or blasting agent according <br />to the schedule required by Section 4.08.3. <br />All surface blasting operations at the Colowyo operation will be conducted by experienced, certified, <br />trained and competent persons who understand the hazards involved. Persons responsible for blasting <br />operations at a blasting site shall be familiar with the blasting plan and any site-specific performance <br />standards. The blaster and at least one other person must be present at the firing of a blast. Each person <br />responsible for blasting operations will possess a valid certification in accordance with the appropriate <br />federal and state law. <br />Colowyo will not conduct blasting within 1000 feet of any building used as dwelling, school, church, <br />hospital, or nursing facility; and 500 feet of facilities, including but not limited to petroleum or gas <br />storage facilities, fluid transmission pipelines, gas or oil collection lines or water and sewage lines. <br />Distances to various structures of possible concern surrounding the mining area are shown on the Blasting <br />Analysis Map (Map 26). <br />Rule 4 Performance Standards 4-26 Revision Date: 1/31/18 <br />Revision No.: TR -119 <br />