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<br /> <br />response to the requirements of the Office. Tltis well, almost 400 feet deep, has been dry since <br />drilled (since 1994). CC&V reaffirms that these wells will continue to be monitored as part of <br />the subject permit while those wells serve their intended purpose of monitoring downstream <br />CC&V's operations. The water-quality data from these wells will continue to be reported to <br />your office, as they have been in the past and as are all such data applicable to the permit for <br />the Cresson Project. <br />The Office has further requested that CC&V protect ground-water quality in the Bateman Creek <br />drainage and that wells located within the Bateman Creek drainage be utilized to monitor the <br />quality of such ground water. (These wells were not installed for purposes of monitoring the <br />Cresson Project. Rather, they were emplaced to gamer reconnaissance information when the <br />valley was examined as part of an earlier leach facility design). CC&V agrees that water-quality <br />data from the two previously listed drainage divide wells will be compared to data from the <br />Bateman Creek mcnitoring wells to monitor for potential changes to existing ground-water <br />quality. <br />Should the ground-water-quality monitoring data from wells "WCRM-2" or "WCRM-9" indicate <br />an adverse change of ground water quality in the area attributable to CC&V's operations (i.e., <br />involving parameters that correspond to statistically valid potential water-quality effects of <br />CC&V's permitted operations), CC&V will expeditiously undertake measures suited to the <br />circumstances to (1) define the cause and extent of the adverse change attributable to CC&V's <br />operations and to (2) mitigate the adverse change that interferes with reasonable uses of the <br />ground water. The specific mitigation measures will be developed based on the site-specific and <br />case-specific data and submitted to the OMLR for concurrence prior to implementation. <br />We do not believe that numeric criteria are necessary or appropriate given the low potential for <br />migration of water away from CC&V's operations into the ground-water system of Bateman <br />Creek. Further, if well WCRM 9 were to produce water, baseline conditions would need to be <br />established because the well has not, since drilled, produced water. Thus, in any event, it is not <br />now possible to determine exactly what criteria best describe ambient water conditions for this <br />well. <br />Should additional questions arise, please call. <br />1 <br />'ncerely, <br />!~~~~C <br />o ~ Har~a~ <br />M ftaeer Environmental Affairs <br />cc: Berhan Keffelew <br />2 <br />