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Geotechnical Stability Exhibit <br />Exhibit 6.5 <br />Noise from blasting is the release of excess energy. Excessive noise can be created if: <br />• there is too much energy for rock conditions; <br />• release of energy occurs through broken ground and existing rock fracture; or <br />• improper stemming or poor stemming materials are used. <br />The release of excess energy is a waste of energy. To eliminate waste, and to comply with <br />applicable regulatory guidelines, the May Day Idaho Mine Complex will conduct small initial <br />blasts. During the initial phases, May Day Idaho Mine Complex personnel will conduct <br />seismograph and noise monitoring when blasting will occur within 400 feet of existing manmade <br />structures in order to verify empirical seismic formulas and to demonstrate compliance with <br />applicable noise criteria. Information to be recorded will include the following: <br />a. Name of the operator conducting the blast; <br />b. Location, date, and time of blast; <br />c. Name, signature, and license number of blaster -in- charge; <br />d. Identification, direction and distance, in feet, from the nearest blast hole to the nearest <br />dwelling, school, church, or community or institutional building not located in the <br />permit area; <br />e. For surface blasts, weather conditions, including temperature, wind direction, and <br />approximate velocity; <br />f. Type of material blasted; <br />g. Sketches of the blast pattern including number of holes, burden, spacing, and delay <br />pattern; <br />h. Sketches shall also show decking, if holes are decked to achieve different delay times <br />within a hole; <br />i. Diameter and depth of holes; <br />j. Types of explosives used; <br />k. Total weight of explosives used per hole and maximum weight of explosives used per 8- <br />millisecond period; <br />1. Initiation system; <br />m. Type and length of stemming; <br />n. Mats or other protections used; <br />o. Type of delay detonator and delay periods used; <br />p. Number of persons in the blasting crew; and, <br />q. Seismographic and airblast records, where required, including: <br />(1) Type of instrument, sensitivity, and the calibration signal of the gain setting or <br />certification of annual calibration; <br />(2) Exact location of instrument and the date, time and its distance from the blast; <br />(3) Name of the person and firm taking the reading; <br />(4) Name of the person and firm analyzing the seismographic record; <br />(5) The vibration and/or air blast level recorded; and <br />(6) Reasons and conditions for each unscheduled blast. <br />Wildcat Mining Corporation <br />May Day Idaho Mine Complex — 112d Permit Application <br />Revised August 2011 <br />Geotechnical Stability Exhibit 6.5 <br />Page 11 of 11 <br />