Supporting Technical Assessments

Tonkin & Taylor Ltd Hazardous Substances Technical Assessment – Waihi North Project - Storage and use of hazardous substances at Willows Road site and the Wharekirauponga Underground Mine Oceana Gold (New Zealand) Limited June 2022 Job No: 1015212.1000 vRev0 8.2 Hazardous substances 46 8.2.1 Effects on people and property 46 8.2.2 Effects on the environment 47 8.2.3 Cumulative effects 48 8.2.4 Transport 48 9 Conclusions 49 10 Applicability 50 Appendix A Location assessment – Surface magazine Appendix B Location assessment – Underground magazine Appendix C Site plans Appendix D Hazardous Substances Management Plan Appendix E Principal Hazard Management Plan for Surface Explosives Appendix F Principal Hazard Management Plan for Underground Explosives Appendix G Principal Control Plan Waihi Emergency Management Appendix H Hazardous Facilities Screening Assessment Appendix I Air Quality Assessment Appendix J Mine Safety Bulletin

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