Laserfiche WebLink
Testing is currently ongoing on the treated tailings <br />• liquid and solids. The results of tailings geochemical test <br />program will be submitted upon completion but are not expected <br />to vary significantly from tailings geochemical characteristics <br />presented in Appendix F of the approved permit. <br />D.6.5 Facilities Desion <br />D.6.5.1 Liner Svstem <br />The liner system consists of several components which <br />provide for total containment for the liquid portion of the <br />tailings. These components are: the tailings, the drainage <br />collection system above the geomembrane liner, and a composite <br />liner system including a geomembrane liner and compacted site <br />subsoils. The combination of these components will create a <br />liner system which both limits the available water reaching <br />the drainage collection layer and reduces the hydraulic head <br />over the composite liner. <br />• As tailings are deposited, the initial tailings <br />contacting the drainage layer will commence to consolidate <br />under the loading of subsequent layers of tailings. As these <br />tailings consolidate, their permeability will be reduced so <br />that a restriction to flow will result. The water released <br />during consolidation will be passed through the drainage layer <br />and will be collected in the drainage pipe network. As the <br />consolidation takes place and the permeability is reduced, the <br />flow rate from the tailings will decrease. The drainage system <br />has been designed so that all water from the tailings will be <br />removed from above the composite liner. By designing a drainage <br />collection to quickly pass all water to the collection pond, <br />the hydraulic head on the composite liner will be limited, <br />thereby reducing the potential for leakage through the liner. <br />The adoption of a composite liner consisting of a high <br />quality installation of a geomembrane over compacted fine- <br />• <br />D-31 <br />