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Mr. Liesveld <br />Page 13 <br />October 10, 2013 <br />8. The blasting plan states that overpressure will be kept below 134 dB and velocity less than 2 <br />inches per second. Please specify how far from the blast location the above referenced <br />limitation is applicable. <br />9. The Division recommends that the Operator conduct a pre -blast survey of all permanent <br />man -made structures which have the potential to be impacted by blasting operations. Please <br />respond. <br />This concludes the Division's preliminary adequacy review of this application. Please remember <br />that the decision date for this application is October 25, 2013. As previously mentioned if you <br />are unable to provide satisfactory responses to any inadequacies prior to this date, it will be your <br />responsibility to request an extension of time to allow for continued review of this <br />application. If there are still unresolved issues when the decision date arrives and no extension <br />has been requested, the application will be denied. <br />If you have any questions, please contact me at (303) 866 -3567 x8116. <br />Sincerely, <br />a- t <br />Michael A. Cunnin ham <br />Environmental Protection Specialist <br />Enclosure <br />CC: Tom Kaldenbach, DRMS <br />