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<br />Fe aquifer in the southwestern portion of the permit area (there are several monitoring wells in <br />this portion of the permit area to verity the water quality). <br />The report further stipulates, on page 3, that "Estimating ground-water flow velocities based on <br />conservative assumptions for aquifer properties, it would take a contaminant plume from the site <br />approximately l5 years Co reach the well via the ground-water pathway." Howevc;r, it appeazs, <br />other conditions (dilution etc.) were not considered when the estimated travel titre of a <br />contaminant plume was calculated. In addition, the report did not take into consitteration any <br />tnitigation activities by the mine operator. Please be assured, it is the intent of the DMG to <br />protect the uncontaminated portion of the alluvial aquifer, to contain the contaminant plume <br />within a specific azea of the permit boundary and to, ultimately, return the water duality in the <br />alluvia] aquifer to the approved perrttit condition values. To date, Battle Mountain Resources, <br />Inc. has cotnmitted to achieve these goals via technical revision number 26 subm ttal. <br />in no way does this letter imply that a monitoring well, or wells, should not be considered by the <br />Town of San Luis for protection of their public water supply. There are other situations within <br />the valley that could adversely affect the groundwater aquifers (junk yazds, trash tiisposal <br />systems, fertilization of crops, etc.), so a monitoring system would be appropriate. The report <br />recommends "that the SLWSD consider the need for asurface-water detection monitoring <br />program..." and that the "sampling be performed at a point within the Rito Seco just upstream to <br />its diversion into Salazar Reservoir:' If this point is selected, it would not detect any potential <br />downstream water quality problems associated with the filling and draining of the Salazaz <br />Reservoir. <br />A copy of the report was sent to Battle Mountain Resources, Inc. <br />If you have any questions, please call James Dillie. <br />Sincerely, <br />~ ~~~~~ <br />,~ <br />H. Bruce Humphries <br />Minerals Program Supervisor <br />cc: Michael Long, Director, DMG <br />James Stevens, DMG Senior <br />Hatry Posey, DMG <br />James Dillie, DMG <br />Bill Lyle, BMRI <br />Kathleen Reilly, WQCD <br />Dave Holm, WQCD <br />Juanita Bernal, SLWSD <br />Mike McGowan, CCCD <br />Cazol Russell, 8EPR-EP <br />