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January 21, 2016 <br />Mr. Michael Cunningham <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />131 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Via FEDEX <br />TRK# 7754 6983 8029 <br />Re: Application -Technical Revisions and Associated TR Fee <br />NESHAP Project: Carbon and Lime Injection/CKD Disposal <br />Mining Permit M-1977-208 (Lyons Quarry) <br />Dear Michael: <br />Enclosed is an application for Technical Revision regarding addition of activated <br />carbon and hydrated lime into the kiln exhaust system, and subsequent disposal of <br />the cement kiln dust (CKD) in C -Pit. The addition of carbon and lime to CKD has been <br />studied and effects have been found negligible. The system has not been <br />commissioned yet but should be operational by late March 2016. Carbon injection will <br />be in the area of 5-15 Ibs/hour. Lime will be injected at a rate of 200-300 Ibs/hour. <br />In -addition, attached is a check for $216 (Check No.23149163) to cover the fee <br />associated with Technical Revisions. <br />Should you have any questions please feel free to contact out office. <br />Kind Regards, <br />Michael Whitehead <br />Environmental Manager <br />303.823.2115 <br />Attachments: <br />• Technical Revision Sheet <br />• Description — CKD Removal to Comply With NESHAP <br />• Check #23149163 for $261.00 TR Application Fee <br />