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Priming of the blasting agent shall be accomplished with cast primers. These primers will be • detonated with either detonating cord or MS NONEL primadet down hole delays if required. A certified blaster will determine the amount of explosive, decking, delays, and stemming required for each blast hole. Coal and parting drilling and blasting procedures are performed in the same manner as the overburden, except the drill pattern may be slightly smaller, 8' x 8' to 15' x 18', due to the smaller thickness of material to be blasted. More packaged products may also be used if increased moisture in the holes exists. To insure proper fragmentation, control or ground vibration, air shock, and flyrock, and to minimize dust generation, various delay systems will be placed in the blast pattern. These systems include noiseless trunkline primadet delays, MS surface connectors, Detaline connectors, and MS-LP NONEL primadet down hole delays. The certified blaster in charge of the blasting operation will ensure that access roads into the blasting areas are physically barricaded or blocked, the entire blast area is checked for unauthorized persons of livestock, and give instructions to sound the warning signal of an impending blast. After the shot has • been tired, the all-clear signal will be given upon instructions from the blaster after the blast site have been inspected for any potential hazards. All drilling, loading, and blasting of drill holes will be performed in accordance with the Colorado State Coal Mining Laws IAnicle 10, Section 2 and Article 11, Sections 1-121, Mine Safety and Health Act 130 CFR 77, 1300-77.13041, Federal Bureau of Alcohol, Tobacco and Firearms IBATFI, Internal Revenue Service (Title 26, Part 181, Commerce in Explosivesl, and Seneca Coal Company (Seneca) safety rules and regulations. Blasting Limitations Airblast. Electric blasting caps, noiseless NONEL detonating equipment, and various delay systems will be utilized to control airblast effects. Airblast will not exceed the limits in Table 14-1 at the location of any dwelling, public building, school, church, or community or institutional building, outside the permit area unless such structures are owned by Seneca and are not leased to any other person. If leased, the lessee may sign a waiver relieving the operator from the meeting the airblast limitation. • 2 Revised 2102