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• 10.3 VLF <br />10.3.1 Leak Detection System Monitoring <br />The LDSs under both the ore liner system and the PSSA liner system to be <br />installed as part of the MLE will be equipped with trenches that lead to sumps <br />into which intercepted water drains is retained for monitoring. These LDSs are <br />described in Section 6.2 of this Project Description and in Appendix 8, Volumes <br />V and VI of this document. Small pumps are inserted in the lined sumps to sample <br />and remove, as necessary, any fluid which may be present. Any fluid removed is <br />directed into the VLF. The fluid is tested for pH and CNWAD on a weekly basis. <br />10.3.2 High Volume Solution Collection System Level Monitoring <br />Water levels in the existing HVSCS areas are monitored at least weekly. The <br />pressure transducers associated with the PSSA pumps are used to monitor the <br />water levels in the HVSCS. Water levels in the new HVSCS added as part of <br />Phase 5 will be monitored at least weekly. <br />10.3.3 Low Volume Solution Collection System Monitoring <br />Water levels in the existing LVSCS are monitored at least weekly. Water levels in <br />. the Phase 5 LVSCS and existing will be monitored on a weekly basis. <br />10.3.4 Underdrain Monitoring <br />The water issuing from the underdrain pipes is monitored at least weekly for pH <br />and CNWAD. The new underdrains included as part of Phase 5 will be added to this <br />weekly monitoring. <br />10.3.5 Pregnant Solution Storage Areas <br />The VLF PSSAs are managed and monitored daily to assure appropriate solution <br />levels and the same monitoring will occur with the Phase 5 PSSA. <br />10.3.6 External Storage Pond Monitoring <br />The ESP leak detection collection and recovery system ("LDCRS") will be <br />monitored, as approved under Amendment No. 8, for water levels at least weekly <br />if process solution is introduced to the ESP. The impoundment areas of this pond <br />also will be monitored on a weekly basis for water levels. Samples will be <br />periodically collected for analysis of pH and CNWAD concentrations. No change <br />to this monitoring is proposed under the MLE. <br />• <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />10-4