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:~ <br />that they can be difficult to read to someone who is not trained in their <br />use, and drill logs are passed on to other drillers to determine where the <br />drilling was left off, resulting in the drill log applying to one or more blast <br />records. Therefore, it is possible to not attach a drillers log to another <br />blasts record that it may also pertain too. <br />Proposal: Colowyo will no longer use the drill logs as an attachment to the blast <br />reports. Instead actual measurements of the depth of each hole will be <br />taken in the field by the blasters and recorded on the Colowyo <br />Chargeweight sheet along with the pounds of explosive for each hole. <br />Comment 3: Part 3: Failure to maintain an annual calibration of a seismograph used to <br />periodically monitor airblast. <br />Blasting, calibration of seisomograph (sic] -The seismograph used to <br />periodically monitor for airblast was out of annual calibration for the period <br />December 14, 2002 to April 29, 2003. <br />Response: The seismograph discussed in this notice was the seismograph <br />maintained at the closest structure outside the permit boundary, which is <br />east of East Pit. Although the calibration date was exceeded, the <br />instrument was determined to be within calibration tolerances noted in our <br />fax correspondence to CDMG dated October 7, 2003. <br />Proposal: Colowyo has included this obligation on it's Compliance Calendar to avoid <br />missing this annual calibration date in the future. <br />Comment 4: Part 4: Failure to record, on airblast records, the name of the person <br />taking seismograph airblast readings and the name of the person <br />analyzing the airblast record. <br />Blasting, airblast record keeping - No airblast record inspected <br />indicated the name of person taking the reading and the name of the <br />person analyzing the airblast record. The record of August 30, 2003 <br />carried the signature of Colowyo Blast Engineer Mathew Lengerich. <br />Response: Colowyo has now incorporated the required information on the airblast <br />record. <br />Proposal: Colowyo will include periodic airblast records in the CDMG Inspection <br />binder with the required information on the record in the future. <br />Notice of Vielatitrr7 Cu-2(?G3-013 4 <br />Comme:~t & ?3esoenses <br />N"~L;CC,_HuEra`tGENTR.?L Fii_E SYSTEttit14.~ GD14iG'~~ 2 Permitla.2.1 CC~iG & dStv1 Inspection <br />Reporis_,NOVst4.2.1.2 NOV's1NOV._t;ti,. 20u3__~i13'.CommenE & Respc~:se'.doc <br />