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Rob Zuber <br />Page 7 <br />April 20, 2016 <br />CCC satisfactorily resolved item 73, and made minor changes to the text on Rule 2, <br />Page 14. <br />The response is sufficient. <br />b. The response is sufficient. <br />c. Please propose a monitoring point(s) that will allow the prediction of "no impact" to the <br />Trout Creek Sandstone to be verified. <br />CCC proposed drilling a new monitoring well into the Trout Creek Sandstone, north to <br />northeast of the middle of the northern edge of the Collom pit, (Volume 15, Rule 4, Page <br />11). CCC have proposed to monitor field parameters quarterly, and a full suite of water <br />quality parameters annually. Such a well will provide a better baseline characterization <br />of the Trout Creek Sandstone aquifer, and should allow the predictions made in the <br />probable hydrologic consequences discussion to be verified. In the interests of <br />expediency this item will be resolved with the following stipulation: <br />Stipulation 18: COLOWYO COAL COMPANY WILL CONSTRUCT A GROUNDWATER <br />MONITORING WELL COMPLETED IN THE TROUT CREEK SANDSTONE, AND CARRY OUT <br />STANDARD WELL TESTS TO ESTIMATE AQUIFER PROPERTIES. FOLLOWING COMPLETION <br />OF THE WORK, A MINOR REVISION WILL BE SUBMITTED TO UPDATE THE PERMIT <br />APPLICATION PACKAGE WITH A COMPLETE DESCRIPTION OF THE WELL, AND TO <br />UPDATE TABLES 2.04.7-38,-39, -40 AND -41. MAPS 10B AND 11C WILL ALSO BE <br />UPDATED. THESE ACTIONS SHOULD BE COMPLETED BEFORE THE END OF CALENDAR <br />YEAR 2016, OR BEFORE ANY DISTURBANCE ASSOCIATED WITH THE COLLOM PIT BOX <br />CUT IS ALLOWED TO OCCUR, WHICHEVER IS SOONER. <br />CCC requested some well -supported changes to the proposed stipulation. The re- <br />worded stipulation, incorporating the requests of CCC is as follows: <br />Stipulation 18: COLOWYO COAL COMPANY WILL CONSTRUCT A GROUNDWATER <br />MONITORING WELL COMPLETED IN THE TROUT CREEK SANDSTONE. FOLLOWING <br />COMPLETION OF THE WORK, A MINOR REVISION WILL BE SUBMITTED TO UPDATE THE <br />PERMIT APPLICATION PACKAGE WITH A COMPLETE DESCRIPTION OF THE WELL, AND <br />TO UPDATE TABLES 2.04.7-38,-39,-40 AND -41, AND MAPS 10B AND 11C. THE <br />REVISION WILL BE SUBMITTED NO MORE THAN 90 DAYS AFTER WELL COMPLETION. <br />THESE ACTIONS MUST BE COMPLETED BEFORE ANY DISTURBANCE ASSOCIATED WITH <br />THE COLLOM PIT BOX CUT IS ALLOWED TO OCCUR. <br />