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in conjunction with lined ANFO for moderately wet holes d) straight ANFO for the dry holes.. <br />Typical poundage of explosives used per hole will range from 0-1420 pounds of ANFO/slurry for <br />full bench production blast, 0-600 pounds of ANFO/slurry for deck shots and 0-90 pounds of <br />ANFO/slurry for parting shots, see Attachment 2.05.3(fi)(a)-5. It is not unusual to use all of the <br />methods listed above, along with loading conventional straight ANFO in dry holes in a single <br />overburden blast pattern. <br />Explosive Storage <br />There will be no explosives stored on the mine permit. All explosives will be handled, and <br />transported by an independent contractor. The independent contractor will store all explosives off <br />of the mine permit, at their own facilities. <br />Blasting Procedures <br />• Vegetation is cleared from the undisturbed surface and suitable topsoil removed prior to drill <br />bench preparation and drilling overburden. The overburden above the Dakota coal seam consists <br />of a poorly cemented sandstone, argillaceous shale, and a calcareous caprock. This overburden <br />will be drilled by a rotary blast hole drill with pattern hole spacings as indicated above. <br />After the holes are drilled, they will be loaded with a blasting agent. The powder factor, pound of <br />explosive per cubic yard of overburden, will vary, but the ground vibration will not exceed 1.0 inch- <br />second at any dwelling past the permit boundary. Priming of the blasting agent shall be <br />accomplished with cast primers. A certified blaster will determine the amount of explosive, <br />decking, delays, and stemming required for each blast hole. <br />Parting drilling and blasting procedures are performed in the same manner as the overburden, <br />except the drill pattern may be slightly smaller, 6'x6' to 15'x15', due to the smaller thickness of <br />material to be blasted. Proper delay systems and adequate stemming will insure proper <br />fragmentation, control ground vibration, air shock, and flyrock, and minimize dust generation. <br />• (Revised 12-07-99) 2.05.3(6)(a)6 <br />