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Nuvemco will leave a low lying abandoned portion of the mine as a potential "mine pool" in the <br />event of excess water flowing from the ore loading area into the mine. <br />Exhibit T• Part 7. Facilities Evaluation <br />should significant water accumulate in the retention pond, it will be collected and <br />analyzed. " <br />DAMS response: Please describe what is meant by "significant water." <br />In the event that a foot or more of standing water ever accumulates in the abandoned and lower <br />portion of the Last Chance Mine, it will be collected and analyzed. <br />Exhibit T; Part S, Ground water information <br />Applicant states "...on this mesa with many mine workings perched several hundred feet <br />above the Paradox Valley and cut by numerous steep canyons, the potential aquifers are dry." <br />Later, wells are described that "...apparently tap the groundwater aquifer within the Upper <br />Triassic -age Chinle Formation, which is considerably below the mining zone of the proposed <br />project and separated from it by the Summerville Formation confining unit" <br />DRMS response: It seems possible that the "many mine workings" could serve as a mode of <br />conveyance for the groundwater that would normally occupy the aquifers now dry. Thus, the <br />likely location of any potential adverse ground water impacts may be the Upper Triassic <br />Chinle formation aquifer. Applicant should describe the measures to be take to monitor and <br />protect the Upper Triassic Chinle formation aquifer. <br />As shown on the attached cross section from Wild Steer to Paradox Valley, the continuous <br />Summerville aquitard is below the mined intervals and adequately protects the Triassic <br />formations. Note that in the vicinity of the proposed Pinion Ridge Mill site, groundwater <br />accumulates in fractured Chinle related to the collapsed anticline and stratigraphically several <br />hundred feet below the mined Morrison sandstones at the top of Davis Mesa. <br />Appendix B; Ore and Waste Sample Analyses <br />Applicant must provide sufficiently detailed location maps that reference the sample number <br />to a location on the ground that would allow DRMS staff to find where the sample was <br />collected. Applicant must also provide photo- documentation of the locations on the ground <br />where SPLP rock samples were collected, plus photographs of the samples themselves. <br />New samples will be collected in the presence of DRMS on the site visit scheduled for April 28, <br />2010 and locations carefully documented and photographed. <br />21 <br />