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Mitigation Work Plans <br /> Additional Information <br /> Page 3 <br /> 7. Pride of the West Tailings <br /> SGC will have full owner approval prior to starting this <br /> project. This will include any TR approval that the owners <br /> may need prior to implementing this project. SGC will advise <br /> DMG on project status so that the appropriate inspections can <br /> be scheduled. <br /> 8. Columbus <br /> SGC will determine the feasibility of installing bulkheads and <br /> if determined feasible, design the bulkheads. These designs <br /> will be submitted to DMG prior to installation. DMG will be <br /> kept informed as to the progress on this project so that <br /> inspections can be scheduled at the appropriate times. <br /> 9. London <br /> SGC will determine the feasibility of installing bulkheads and <br /> if determined feasible, design the bulkheads. These designs <br /> will be submitted to DMG prior to installation. DMG will be <br /> kept informed as to the progress on this project so that <br /> inspections can be scheduled at the appropriate times. <br /> The appropriate dosage rate, to stabilize the tailings or mine <br /> waste to a near neutral pH, will be determined for each project <br /> where it is proposed by; <br /> 1) taking a composite sample representative of the material <br /> to be pH stabilized. <br /> 2) taking a paste pH of the material to determine if <br /> alkaline material addition is required. <br /> 3) adding measured amounts of alkaline material to a <br /> known weight of material, mixing and then taking a paste <br /> pH of the material. This step will be repeated until the <br /> paste pH of the mixture is near neutral. <br /> 4) extrapolating the quantity of alkaline material required <br /> to raise the pH of the material to near neutral in the <br /> bench test to equipment size lots which will be used in <br /> the removal process. <br /> 5) this dosage rate may be checked and changed during the <br /> project. <br />