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<br />' TR-15 RESPONSE PLAN: SUPPLEMENTAL MOMTORING AT WEST PIT, <br />BMRI'S SAN LUIS PROJECT, PERMIT NO. M-88-112 <br /> <br /> 1.0 INTRODUCTION <br />' <br /> The following site characterization and response plan has been prepared and submitted for the <br />' review of the Colorado Division of Minerals and Geology (Division) related to groundwater <br /> quality analyses of monitoring well M-I1R and recently observed seepage at the Battle <br />' Mountain Resources, Inc. (BMRI)-San Luis operation. Incompliance with Technical Revision <br />d L <br />15 <br />TR <br />15 <br />BMRI' <br />C <br />l <br />d <br />Mi <br />d R <br />l <br />i <br />B <br />d <br />CMLR <br /> an <br />( <br />- <br />) to <br />s <br />o <br />ora <br />o <br />ne <br />ec <br />amat <br />on <br />oar <br />( <br />B) Petunit No. M-88- <br /> 112, BMRI has been collecting and analyzing quarterly water quality samples from wells <br /> established downgradient of the West Pit and designated as compliance wells. Analytical <br /> results from the third quaRer (July 8, 1998) groundwater analysis of monitoritg well M-11R <br />' indicated elevated concentrations of total dissolved solids (TDS) above 613 mg/1, the level <br /> established as a compliance value for that well. In accordance with BMRI's ground water <br /> monitoring plan, a verification sample was collected and submitted for analysis on August lOd' <br /> from the well. The analysis from this sample collection indicated a continued elevation of <br /> TDS. Analytical reports from Sangre de Cristo Laboratories of Alamosa, Colorado were <br /> submitted to the Division on August 4'" and August 12d' for the Division's review and <br /> continued dialogue with BMRI representatives. <br /> Two additional verification samples as requested by the Division were collected for continued <br /> evaluation of the TDS concentration. These samples were collected and submitted for analysis <br /> on August 20'" and August 2T". Both verification samples identified elevated TDS <br />' concentrations. Analytical reports for these samples were submitted on August 25'" and <br /> September 2nd to the Division. <br /> <br /> In light of previous BMRI and Division experiettce with iron-producing bacteria formation <br /> associated with monitoring well M-11, which M-11R replaced, BMRI collected and submitted <br /> samples on September 4, 1998 to Sangre de Cristo Laboratories for culture and analysis to <br /> <br />1 <br />1 <br />