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Mr. Graff <br />Page 1 2 <br />May 20, 2011 <br />4. Under the terms of TR03, the Operator stated that groundwater depths would be maintained <br />within one to two feet of the baseline levels. The Operator committed to increasing <br />recharge rates if the measured groundwater depths were outside that range for any area. It is <br />the Division's understanding that the Operator measures groundwater levels on a weekly <br />basis. Please clarify the conditions which must be met before recharge rates are increased. <br />Would recharge rates be increased if the monthly average groundwater depth for a <br />monitoring well is greater than one to two feet below the lower baseline level? <br />5. The groundwater monitoring plan approved under TR03 specified that piezometers would be <br />monitored on a monthly basis after benchmark levels were established. The Operator is <br />currently measuring groundwater levels on a weekly basis. Please indicate if the Operator <br />will continue to monitor on a weekly basis and if so, commit to submitting the weekly <br />monitoring data with your Annual Report. <br />This concludes the Division's preliminary adequacy review of this application. Please remember <br />that the decision date for this application is June 17, 2011. As previously mentioned, if you are <br />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 />Michael A. C?gham <br />Environmental Protection Specialist <br />CC: Tony Waldron, DRMS