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Please revise the regulatory citation to 4.08.4(10(c)(i). <br />Conducting blasting operations in accordance with the equation in 4.08.4(10)(c)(i) <br />deems peak particle velocities from blasting to be within the regulatory limits <br />described in 4.08.4(10). <br />Item 18 Use of the equation does not, however, provide an exemption from the requirements to <br />conduct periodic airblast monitoring. <br />Please add a new sentence to section "4.08.5 Records of Surface Blasting Activities" that <br />states something to the effect of, "Records of the airblast monitoring described on page 2.05- <br />30 will contain the information required by Rule 4.08.5(17). This information will include <br />either a recording of the calibration signal of the monitoring instrument's gain setting at the <br />time of each blast, or certifications of the instrument's annual calibration." <br />As these items were identified during a review of the Permit Renewal Application, revised pages <br />can be submitted for inclusion into the Pemut Application Package under the Permit Renewal <br />Application. <br />Please call me if you have any questions. <br />Yours truly, <br />~.9~~~ ~s G+/ <br />Byrofi G. Walker <br />Environmental Protection Specialist <br />Cc: (for public review file, Permit Renewal Application) Moffat County Clerk, 221 West Victory <br />Way, Craig, CO 81625 <br />