Supporting Technical Assessments

Waihi Emergency Principal Control Plan Approved by: General Manager/SSE Approval Date: 26/03/2021 Next Review:26/03/2022 OceanaGold Waihi WAI-250-PLN-001 Page 16 of 124 Potential incident / accident Potential location Internal response required Casualty management outcome External services provided 6. Weather event All areas ERT and site medics, first aid responders, IMT initiated Multiple casualties, persons trapped, crush injuries, major trauma Fire, Police, Ambulance, Hospital, Civil Defense 7. Tailings impoundment failure Development Site Tailings Dam ERT and site medics, first aid responders, IMT initiated Multiple casualties Fire, Police, Ambulance, Hospital, Environment Waikato, Civil Defence 8. Mining-vehicle accident (vehicle collision persons trapped, pedestrian interaction) All areas ERT and site medics, first aid responders, IMT initiated Personnel buried, trapped in vehicles, crush injuries, personnel isolated Fire, Police, Ambulance, Hospital 9. Explosives emergency All areas ERT and site medics, first aid responders, IMT initiated Personnel trapped, unconscious, inhalation of gases Fire, Police, Ambulance, Hospital 10. Explosives Fire Emergency All areas ERT and site medics, first aid responders, IMT initiated Personnel trapped, unconscious, inhalation of gases Fire, Police, Ambulance, Hospital 11. Major pit wall failure Surface open pit ERT and site medics, first aid responders, IMT initiated, CMT Initiated Personnel buried, trapped in vehicles, personnel isolated head injuries, crush injuries, major trauma incidents heart attack Fire, Police, Ambulance, Hospital 12. Major strata failure - earthquake All areas ERT and site medics, first aid responders, IMT initiated CMT Initiated Personnel buried, trapped in vehicles, personnel isolated head injuries, crush injuries, major trauma incidents, heart attack Fire, Police, Ambulance, Hospital, Civil Defense 13. Entrapment All areas ERT and site medics, first aid responders, IMT initiated, CMT Initiated Personnel buried, trapped in vehicles, personnel isolated head injuries, crush injuries, major trauma incidents, heart attack Fire, police, ambulance, hospital, NZMRS 14. Flooding All areas ERT and site medics, first aid responders, IMT initiated Personnel trapped or injured Fire, Police, Ambulance, Hospital 15. Process plant - chemical spill and/or gas leak All areas ERT and site medics, first aid responders, IMT initiated Entrapment personnel isolated, crush injuries Fire, Police, Ambulance, Hospital 16. Confined space incident All areas ERT and site medics, first aid responders, IMT initiated Drowning, hyperthermia, chemical exposure, personnel isolated Fire, Police, Ambulance, Hospital 17. Explosion All areas ERT and site medics, first aid responders, IMT initiated Personnel buried, trapped in vehicles, personnel isolated head injuries, crush injuries, major Fire, Police, Ambulance, Hospital

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