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SUMMIT ENGINEERING C 0 1 ENGINEERS & LAND SURVEYORS <br /> Mail: P.O. Box 1897 Alamosa, CO 81101 P: 719-589-6147 E: summitengco@gmail.com <br /> Memo to Kate Pickford 3 December 19,2007 <br /> Blasting Vibration Control Plan File No.M-2007-080 <br /> g. Diameter and depth of holes; <br /> h. Types of explosives used; <br /> i. Total weight of explosives used per hole and maximum weight of explosives used per 8- <br /> millisecond period; <br /> j. Initiation system; <br /> k. Type and length of stemming; <br /> 1. Mats or other protections used; <br /> m. Type of delay detonator and delay periods used; <br /> n. Number of persons in the blasting crew;and <br /> o. 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 /> cc: Tony Waldron,DRMS(via email) <br /> Carl Mount,DRMS(via email) <br /> e.1w McsNMr Daummu 4-19-06 dauVobkm bbstins rMew.da <br /> Job # 1200710MP - A Page 74of78 <br />