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Memo to Deb 2 May 25, 2007 <br />Byzantine Quarry Geotechnical Review File No. M-2007-014 <br />Section 6.5-2 of the geotechnical stability exhibit is a letter report prepared by Buckley Powder Company. <br />The report states that blasting at the quarry will be done in conformance with the scaled distance formula, <br />which is acceptable to the DRMS. However, the Applicant must commit to preparing a blasting report for <br />each shot. These reports must be retained by the Operator for at least three years and be available for <br />inspection by the DRMS on demand. The reports shall contain the following data: <br />a. Location, date, and time of blast; <br />b. Name, signature, and license number ofblaster-in-charge; <br />c. Identification, direction and distance, in feet, from the nearest blast hole to the nearest <br />potentially affected structure either: <br />i. not located in the permit area; or <br />ii. not owned nor leased by the person who conducts the mining operations; <br />d. Type of material blasted; <br />e. Sketches of the blast pattern including number of holes, burden, spacing, and delay pattern. <br />Sketches shall also show decking, if holes are decked to achieve different delay times within a <br />hole; <br />f. Diameter and depth of holes; <br />g. Types of explosives used; <br />h. Total weight of explosives used per hole and maximum weight of explosives used per 8- <br />millisecond period; <br />i. Initiation system; <br />j. Type and length of stemming; <br />k. Mats or other protections used; <br />1. Type of delay detonator and delay periods used; <br />m. Number of persons in the blasting crew; and <br />n. Seismographic records, where required, including: <br />i. Type of instrument, sensitivity, and the calibration signal of the gain setting or <br />certification of annual calibration; <br />ii. Exact location of instrument and the date, time and its distance from the blast; <br />iii. Name of the person and firm taking the reading; <br />iv. Name of the person and firm analyzing the seismographic record; <br />v. The vibration level recorded. <br />enclosure(s) <br />cc: Cazl Mount, DRMS, via email <br />Tony Waldron, DRMS, via email <br />c:~acs filesUly Documents 4-19-06 thm\byzantine I l2 quarry geotech review.doc <br />