Oceana Gold Waihi North Project Waihi North Project Geochemical Assessment – Geochemistry of Tailings and Overburden, Treatment and Mitigation Revision 0 – 17-Jun-2022 Prepared for – Oceana Gold (New Zealand) Limited – Co No.: 2274246 AECOM Appendix B Geochemical Assessment Wharekirauponga Underground Mine B Appendix C Acid Base Accounting Dataset C Appendix D Kinetic and Column Testing Results D Appendix E GHD Column Results E Appendix F PHREEQC Outputs F
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