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Geotechnical Stability Exhibit <br /> W= (D/SDF)z <br /> Where <br /> W=weight in pounds of detonated explosive in any period greater than 8 milliseconds. <br /> D=is distance in feet from the structure of concern <br /> SDF=Scaled Distance Factor <br /> As an example: <br /> If a structure is 200 feet away from the blast site,the maximum amount of explosives per delay <br /> is 16 pounds without the need for a seismograph. <br /> As necessary, blasting data and information to be recorded may 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 permit <br /> 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 /> I. 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 air blast 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; <br /> r. Reasons and conditions for each unscheduled blast. <br /> Wildcat Mining Corporation <br /> 112(d)Permit—May Day and Idaho Mine Application <br /> Revised November 14,2014 <br /> Rule 6.5 Page 4 of 7 <br />