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 8 of 124 Appendix E Fixed Plant Gas Monitors – Process Plant ..................................................................60 Appendix F Underground Emergency Plan Schematic....................................................................61 Appendix G Underground Emergency Plan – Plan View..................................................................62 Appendix H Underground Emergency Plan - Section View .............................................................63 Appendix I Public Safety Evacuation Zones ....................................................................................64 Appendix J Explosive Blast Pressure Distance................................................................................65 Appendix K Fire Fighting Resource Maps ........................................................................................66 Appendix L Dam Embankment Notification Flow Chart (Check contact numbers) ......................70 Appendix M Classification of Dam Embankment Visible Features..................................................71 Appendix N Site Spill Plan ...................................................................................................................72 Appendix O Cyanide Emergency Procedures ....................................................................................82 Appendix P Trigger Action Response Plans – T.A.R.P ....................................................................90 1.1 Serious Injury / Accident (On and off site including fatality) ......................................91 1.2 Multi Casualty Incident....................................................................................................92 1.3 Fire – Surface ...................................................................................................................93 1.4 Machinery / Tyre Fire.......................................................................................................94 1.5 Fire - Underground ..........................................................................................................95 1.6 Weather Event ..................................................................................................................96 1.7 Tailings Impoundment Failure .......................................................................................97 1.8 Mining – Vehicle Accident ..............................................................................................98 1.9 Explosives Emergency....................................................................................................99 1.10 Explosives Fire Emergency......................................................................................... 100 1.11 Pit Wall Failure .............................................................................................................. 101 1.12 Major Strata Failure – Earthquake .............................................................................. 102 1.13 Entrapment .................................................................................................................... 103 1.14 Flooding......................................................................................................................... 104 1.15 Process Plant – Chemical Spill and/or Gas Leak ...................................................... 105 1.16 Confined Space Incident.............................................................................................. 106 1.17 Explosion....................................................................................................................... 107 1.18 Missing Persons ........................................................................................................... 108 1.19 Inrush............................................................................................................................. 109 1.20 Vehicle Collision (persons trapped) ........................................................................... 110 1.21 Violence/Bomb Threat.................................................................................................. 111 1.22 General – Illness ........................................................................................................... 112 1.23 Helicopter Incident ....................................................................................................... 113 1.24 Security.......................................................................................................................... 114 Appendix Q Process Plant Safety Appliance Area Map .................................................................. 115 Appendix P UG Safety Appliance Area Map ..................................................................................... 116 Appendix R Security Duty Cards ..................................................................................................... 117 Security Guard – Record Emergency Call ................................................................... 117 Security Flow Chart ...................................................................................................... 121 Appendix S Site Specific Evacuation Duty Cards ............................................................................ 122 Appendix T – Mapping Of This Empcp To The Health & Safety (Mining Operations And Quarrying Operations) Regulations 2016. .................................................................................... 123 FIGURES Figure 1: Crisis Management Team ................................................................................................ 18 Figure 2: OceanaGold Hierachy of Documents ............................................................................... 45 Figure 3: Waihi Risk Management Process..................................................................................... 47

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