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Sunnyside Mine Pool Mitigation <br /> Page 3 <br /> Analysis cont. <br /> springs will be of higher pH and have alkalinity to neutralize acid salts that may be <br /> present in the mine or historic flow paths. <br /> 4) Should future drawdown of the mine pool become necessary, drawdown could be <br /> accomplished more rapidly because pool water would be of higher pH and better quality. <br /> As the entire system moves to equilibrium, the addition of high pH waters will force physical and <br /> chemical equilibrium faster and result in lower initial concentrations of dissolved heavy metals in the <br /> pool. <br /> Monitoring <br /> There is no access to the mine pool except for the hydraulic seals located in the Terry Tunnel <br /> and American Tunnel. SGC will sample the quality of the pool through the American Tunnel seal <br /> annually, as described in TR-14 submitted to the Division of Minerals and Geology. The seep and <br /> spring sampling program as discussed in SGC Technical Revision 14 with the Division of Minerals <br /> and Geology will be continued as scheduled. Annual reports on the progress of this study are <br /> distributed to both the Division of Minerals and Geology and the Water Quality Control Division. <br /> Monitoring of seeps and springs will continue until the mine pool has reached equilibrium plus two <br /> years as defined in SGC MLR Permit Technical Revision 14. <br /> Reporting <br /> Due to the seasonal access minimizing work time on this project, SGC would submit annual <br /> progress reports. Reporting for this project will include amount of alkaline material injected, water <br /> injected and effects on pool height. Once injection is completed, a final report will be submitted. <br /> Reports will be sent to both the Colorado Division of Minerals and Geology and the Water Quality <br /> Control Division. <br /> Bum <br /> SGC will fund this program. <br /> Remedial Goals and Objectives <br /> 1) Speed physical equilibrium of mine pool. <br /> 2) Speed chemical equilibrium of mine pool. <br /> 3) Reduce first flush impact,if any,from waters that may emanate from Sunnyside workings <br /> or from historic flow paths as they are reestablished when waters now entering the <br /> Sunnyside Mine begins once again to flow around the area. <br /> 4) Maintain high pH water in pool in order to facilitate rapid drawdown, if necessary. <br />