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COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> September 27,2016 <br /> Mark Johnson <br /> Bestway Concrete Company <br /> 301 Centennial Dr. <br /> Milliken, CO 80543 <br /> RE: Rocky Flats Pit; DRMS File No. M-1987-113; Technical Revision No. 3 —Adequacy Review No. <br /> 2 <br /> Dear Mr. Johnson, <br /> The Division of Reclamation, Mining and Safety(Division)received Technical Revision- 03 (TR-03) for <br /> the above referenced site on April 6, 2016.The decision date for this Technical Revision is October 21, <br /> 2016. The Division has reviewed the proposed revisions and has the following comments: <br /> 1. The Operator is proposing to elimate surface water runoff which accumulates in the pit by pumping <br /> and discharging the water onto the affected lands. The Operator has stated a stormwater discharge <br /> pen-nit will not be required for this activity. Please demonstrate a discharge permit is not required <br /> through the Colorado Water Quality Control Division or commit to obtaining a discharge permit prior <br /> to initiating pumping activities. <br /> This concludes the Division's preliminary adequacy review of this Technical Revision. Please remember <br /> that the decision date for this Technical Revision is October 21, 2016. 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 Technical Revision. If <br /> there are still unresolved issues when the decision date arrives and no extension has been requested,the <br /> Technical Revision will be denied. <br /> If you have any questions,please contact me at(303)866-3567 x8116. <br /> Sincerely, <br /> Michael A. Cu�ingham <br /> Environmental Protection Specialist <br /> CC: Wally Erickson, DRMS <br /> Steve O'Brian, Environment, Inc. <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br /> John W. Hickenlooper, Governor I Robert Randall, Executive Director I Virginia Brannon, Director <br />