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Responses to Division Concerns <br /> Page 11 <br /> Action plans to deal with mine pool seepage flows that are <br /> determined to require remediation could encompass a wide range <br /> of proposals and would have to be decided on a case by case <br /> basis. <br /> In the case of bulkhead leakage, the action plan order of <br /> preference would be 1) additional grouting and 2) plug <br /> extension. <br /> In the case of flows through the rock around the bulkheads , <br /> the action plan order of preference would be 1 ) grouting and <br /> 2) additional bulkheads or tunnel linings . <br /> In the extreme case, mine pool draw-down will be an option and <br /> SGC will have the ability to draw-down and treat the pooled <br /> water . <br /> The by-pass pipe section through the bulkhead will be upgraded <br /> to Schedule 80 pipe for added conservatism although this is <br /> not necessary due to the neutral PH of the water to be <br /> impounded. <br /> 4. Construction Performance Plan <br /> SGC will commit to the same certification and inspection <br /> criteria for the American Tunnel and Terry Tunnel bulkheads as <br /> committed to for the F-Level and B-Level Brenneman bulkheads . <br /> 5. Monitoring and Reporting Plan <br /> The baseline monitoring data and report will be submitted upon <br /> receipt of assay data. As discussed in our telephone <br /> conversation on September 17, 1993 , the report and data will <br /> be submitted for review prior to the November Board meeting. <br /> Monitoring data , as proposed in Item 2 will be submitted with <br /> the annual report. All data will be correlated in report form <br /> with the raw data submittal . <br /> The Division will be notified if bromide is detected through <br /> the monitoring program or significant leakage is observed <br /> during bulkhead inspection. <br />