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Docusign Envelope ID:45B9721 C-FDE2-4821-B686-80BBC79CA6DD <br /> hydraulic conductivity of the ore material used is approximately 2.0E-01 cm/s. The additional models <br /> have been included in Attachment 10. <br /> • 70. Within Appendix F Water Balance, Section 2.6, it states VLF1 Phase IV will receive solution <br /> from,and return water to, SGADR2. Please confirm this statement is correct as Phase IV is <br /> has been associated with ADR1 since its construction. <br /> Please see the attached updated Water Balance Memo. Section 2.6 has been revised(Attachment 10). <br /> 71. Please revise Figure 3: VLF1 and VLF2 Current and Planned Phases within Appendix F <br /> Water Balance, Section 2.6, to label VLF1 Phase II as Phase II/III as named elsewhere <br /> throughout the permit file. <br /> Please see the attached updated Water Balance Memo. Section 2.6 has been revised(Attachment 10). <br /> 72. Within Appendix F Water Balance, Section 2.7.2,states if the holding capacity of a VLF2 <br /> PSSA is exceeded, it spills to the environment. Please revise this statement to describe <br /> how PSSA 3 flows to PSSA 1 if it is exceeded and only an exceedance of PSSA 1 will flow <br /> off-liner. Please also revise Figure 4 in the same section or provide a separate flow <br /> schematic to depict this interconnectedness with the VLF2 PSSAs.A similar discussion <br /> and figure should be added to Appendix F for VLF1 PSSAs. <br /> Please see the attached revised water balance with the amended statement for section 2.7.2 <br /> (Attachment 10). <br /> 73. Within Appendix F Water Balance, it is concluded in Section 5 that the greatest potential <br /> for water excess occurs immediately after 2036 when the VLFs are at their largest extent <br /> and a large amount of solution is circulating. Please describe what measure will be taken <br /> • leading up to this time period and provide details on what the trigger point will be to <br /> initiate these preparations. Please provide a plan to notify the Division when the lead-up to <br /> this time period begins to ensure measures are taken to prevent water balance issues at <br /> the time of greatest potential excess. <br /> A trigger Action Response Plan (TARP) will be implemented beginning in 2034. This plan is <br /> designed to ensure that, during the preceding years of solution deficit, fresh water is not <br /> excessively used to replenish spent solution. <br /> Triggers within the TARP will be continuously re-evaluated based on : <br /> • Prevailing antecedent conditions <br /> • The most current business plan, forecast stacking, and injection strategies <br /> Notification to the Division will be provided as necessary throughout this period to ensure <br /> appropriate measures are in place to mitigate potential water balance issues during the time of <br /> greatest potential excess. A detailed implementation timeline for the TARP will be provided by <br /> Q1 2033, once further operational and planning inputs are finalized. <br /> Appendix 7—Water Quality Monitoring Plan and Quality Assurance Project Plan (QAPP) <br /> 74. The date on Appendix 7 is Feb 26, 2024. The QAPP was updated through TR139 which was <br /> approved on January 31, 2024.What are the differences between the QAPP version that <br /> was provided in response to TR139 Adequacy Review Response#2 with the date January <br /> 16, 2024 and the QAPP that comprises Appendix 7? <br /> The QAPP submitted with Amendment 14 is identical to the QAPP approved on January 31, 2024, in <br /> • response to TR139. Please see the attached QAPP with the correct approval date (see <br /> Attachment 11). <br /> SSR Mining Inc. PAGE 18/19 <br />