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Aggregate Industries-WCR, Inc. <br />Page 2 <br />5/21/2015 <br />4) At what frequency will the monitoring data be collected from the staff gauge and wells? <br />This concludes the Division's preliminary adequacy review of this submittal. This letter shall not be <br />construed to mean that there are no other technical deficiencies in your submittal. Please remember that <br />the decision date for TR -04 is June 22, 2015. At this time, if you are unable to provide satisfactory <br />responses to any inadequacies prior to this date, it will be your responsibility to request an extension <br />of time to allow for continued review of this Technical Revision. If there are still unresolved issues <br />when the decision date arrives and no extension has been requested, TR -04 will be denied. <br />If you need additional information please contact me at the Division of Reclamation, Mining and Safety, <br />1313 Sherman St., Room 215, Denver, CO 80203, by telephone at 303-866-3567, extension 8131, or by <br />email at Tyler. ODonnell&state.co.us. <br />Sincerely, <br />Van- " � - <br />Tyler O'Donnell <br />Environmental Protection Specialist <br />CERTIFIED MAIL NO. 7014 0150 0000 9138 2968 <br />Return Receipt Requested <br />cc: Wally Erickson, DRMS <br />