2018-04-13_PERMIT FILE - C1981019A

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RULE 4 PERFORMANCE STANDARDS 4.07.4 Abandonment in Designated Groundwater Basins This subsection is not applicable to the Colowyo mining plan. Exploration taking place inside and outside of the permit area will be handled through the Notice of Intent (NOI) procedures. See the appropriate NOI for details for each program. With the approval of Technical revision 50, all exploration holes located within the permit boundary are transferred to NOI X-95-109-5 and are managed under Coal Exploration procedures. Wells drilled as an integral part of water monitoring plans identified in the PAP (Permit C-81-019) and water supply wells (for identified in the PAP (Permit C-81-019) and water supply wells (for mining purposes) are managed under this Permit C-81-019. 4.08 Use of Explosives 4.08.1 General Requirements Colowyo will comply with all applicable State and Federal laws in the use of explosives. Colowyo will conduct all blasts that use more than five pounds of explosives or blasting agent according to the schedule required by Section 4.08.3. All surface blasting operations at the Colowyo operation will be conducted by experienced, certified, trained and competent persons who understand the hazards involved. Persons responsible for blasting operations at a blasting site shall be familiar with the blasting plan and any site-specific performance standards. The blaster and at least one other person must be present at the firing of a blast. Each person responsible for blasting operations will possess a valid certification in accordance with the appropriate federal and state law. Colowyo will not conduct blasting within 1000 feet of any building used as dwelling, school, church, hospital, or nursing facility; and 500 feet of facilities, including but not limited to petroleum or gas storage facilities, fluid transmission pipelines, gas or oil collection lines or water and sewage lines. Distances to various structures of possible concern surrounding the mining area are shown on the Blasting Analysis Map (Map 26). By employing the design criteria to minimize air blast and ground vibration Colowyo will insure that flyrock, including blasting material traveling along the ground, will not be cast from the blasting vicinity, more than half the distance to a nearby dwelling or other occupied structure and in no case beyond the line of property owned or leased by the Company or beyond the area of regulated access required under Subsection 4.08.4(5). The minimization of flyrock is also important and routinely monitored in order to reduce damage to mining equipment. 4.08.2 Pre -Blasting Survey Upon request to the Division by a resident or owner of a dwelling or structure located within one-half mile of any part of the permit area, Colowyo will promptly conduct a pre -blasting survey. A copy of correspondence advising our neighbors of this. opportunity is provided in Exhibit 14 - Seismograph Measurements, Item 2. A report of the survey will be submitted to the Division and to the person requesting the survey. The pre -blasting survey will assess the condition of the structure or dwelling and Rule 4 Performance Standards 4-27 Revision Date: 8/28/17 Revision No.: TR -115