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Trapper Mine, pg: 2 <br />F Pit <br />October 1St, coal blast; Oct. 4th, overburden blast; Oct. 5th, overburden blast, <br />Oct. 8th, coal blast, and Oct. 10th, parting blast. <br />Z Pit <br />October 12th, parting blast; Oct. 16th two parting blasts; and Oct.' '17, parting <br />blast. <br />All blasts at TMI are conducted within the weight distance formula specified <br />in Rule 4:08. Totalpounds of explosives detonated during any 8 ms period <br />were documented within the individual blasting records above. All the <br />records reviewed were conducted within the weight distance formula. <br />The October 5th overburden blast record for the F Pit had total pounds of <br />explosives detonated during, any 8 ms delay`period recorded using the <br />highest~total pounds of~explosive (ANFO) used per hole, multiplied by 4' <br />holes, as 4 holes were being detonated per delay period. This total pounds of <br />explosive detonated during any 8 ms delay period exceeded the total allowed <br />by the weight distance formula. We further reviewed this calculation -and the <br />blast sketch with the blasting department, and determined this "worst case" <br />of the 4 holes containing the highest total pounds of explosive per kole being <br />detonated together during one'delay period did not occur. This record has <br />been corrected (confirmed via telephone call with Forrest Luke on <br />November 16, 2007). <br />All blasts at TMI are monitored for airblast at the nearest occupied dwelling <br />from the blasting area. Airblast monitoring is done by Matheson <br />Engineering. Airblast levels monitored to date have not exceeded the <br />compliance limits of Rule 4.08. Airblast and seismic monitoring (where <br />required) is maintained as a separate record, and is available for inspection <br />(confirmed via telephone call with Forrest Luke on November 16, 2007). <br />