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Mr. Michael Cunningham <br /> CEMEX Sandstone Quarry—Response to Preliminary Adequacy Review Comments <br /> Permit M-1977-361 <br /> July 1, 2014 <br /> Comment 2:As required by Rule 6.3.3(h), specify how much water will be used in conjunction with the <br /> operation and identify the source of the water. <br /> CEMEX Response 2: At this time, no water is anticipated to be needed other than dust suppression on <br /> the roads, as necessary, during loading and/or hauling activities. Water for dust suppression will be <br /> imported in water trucks from the nearby Dowe Flats or Lyons Quarries. <br /> Comment 3: Upon reviewing the original permit file for the CEMEX Sandstone Quarry, it was determined <br /> that the Operator has never addressed the use of explosives at the mine site. As required by Rule <br /> 6.3.3(p), the Applicant must demonstrate, pursuant to Subsection 6.5(4), Geotechnical Exhibit, that offsite <br /> areas will not be adversely affected by blasting during mining and reclamation operations. Please provide <br /> the following information: <br /> a) How frequently does blasting occur? <br /> b) Specify the blast pattern <br /> c) Provide a cross section of a typical hole profile <br /> d) Specify the delay timing <br /> e) Specify the air overpressure <br /> f) Specify the peak particle velocity <br /> g) Specify the maximum weight of explosives detonated in an 8 millisecond period <br /> CEMEX Response 3: CEMEX has a current blasting plan for the Sandstone Quarry that complies with all <br /> Federal, State, and local regulations. Blasting at the Sandstone Quarry is conducted as needed at a <br /> frequency of two to four times per year. The maximum weight of explosives per 8 millisecond period is <br /> equivalent to 650 pounds. Appendix C-1 (attached here) includes the standard blast pattern, a cross <br /> section of a typical hold profile, the timing pattern, and a seismography report from a recent typical blast <br /> at the quarry. <br /> Comment 4: Please provide a commitment to complete a blasting report for each shot. The report must <br /> be retained by the Operator for at least 3 years and be available for inspection by the Division on <br /> demand. <br /> CEMEX Response 4: CEMEX uses a certified blasting contractor to complete all blasting activities. The <br /> contractor provides a detailed blasting report after each blast which includes all information required <br /> under Federal, State, and local regulations and all of the information included in the adequacy letter. <br /> CEMEX will retain these reports for at least three years and they can be available for DRMS inspection <br /> upon request. <br /> 6.3.4 Exhibit D-Reclamation Plan <br /> Comment 5: The Applicant has stated that portions of the reclaimed site may receive fertilizer treatment. <br /> Please commit to providing the Division with the results of any soil analyses that are conducted prior to <br /> applying fertilizers. <br /> CEMEX Response 5:After topsoil has been imported to the site, CEMEX may collect samples for lab <br /> analysis of agronomic characteristics. The results of these analyses and the planned fertilizer application <br /> rates will be provided to DRMS at that time. The fertilizer types and rates included in the reclamation cost <br /> estimate were based on fertilizers applied to reclaimed areas on nearby CEMEX properties. <br /> Comment 6: The Applicant has stated that some roads may remain after final reclamation in order to <br /> access the reclaimed site. Please specify which roads will remain and identify them of the Reclamation <br /> Plan Map. <br /> Page 2 of 4 <br />