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 20 of 124 7.2.1 Response Levels Each TARP has up to 3 levels of response: • level 1 – contact area supervisor – ensure safety of all personnel • level 2 – contact senior management (May require external emergency service providers) • level 3 – contact senior management (Will require external emergency service providers) Table 3 Response Levels Level 1 Level 2 Level 3 Localized response by mine staff with own resources Full turnout of ERT team. External support on stand-by or mobilized External assistance mobilized, • Injury or incident requiring first aid treatment • No further threat or danger of escalation • Damage affecting and not halting mine operations • Injury or incident requiring personnel to exit mine • Emergency Response Team informed / on stand by and mobilized if required. • People seriously injured • Personnel are trapped or missing under hazardous conditions • Further threat or danger of escalation • Emergency Response Team activated, put on standby • Damage to mine safety systems • SSE or delegate notified • Incident Management Team may be activated • May require assistance of external emergency service providers • External support (e.g. WorkSafe, MRS or Police) may be brought into the IMT to assist the MIC. • Notify SSE • A major level incident that may result in multiple fatalities and/or trigger significant public interest. • Potential duration of operation is beyond 2-3 hours. • Personnel trapped or seriously injured with high level of risk • Increasing complexity, duration and consequences (out of control) • Of national concern / media interest • Serious damage to safety systems • Emergency Management Plan initiated and may escalate to Corporate Crisis Management Plan. • External emergency service providers assistance required • NZ Mines Rescue mobilized • Need for strategic advice and potential for additional resources beyond the capacity of the mine operator. • Initiate Underground Mines Rescue Protocol for underground level 3 emergencies.

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