Supporting Technical Assessments

Waihi Underground Explosive Principal Hazard Management Plan Approved by: SSE/ General Manager Approval Date:11/05/2021 Next Review: 08/04/2022 OceanaGold Waihi Document ID: WAI-400-PLN-007 Page 20 of 27 8 EMERGENCY PREPAREDNESS OGNZL has well established management plans to deal with emergencies on site. These include dealing with fires on the surface and underground and evacuation procedures where there is a risk of an uncontrolled explosion. A highly competent and well-trained Emergency Response Team (ERT) is on call 24/7 to respond to any emergency on site. All information on site emergency preparedness is detailed in the management plans and procedures already in place; refer to Appendix I for document details. 9 AUDIT AND REVIEW The SSE is responsible for ensuring this PHMP is reviewed for effectiveness: • At least once every two years after the date this PHMP is approved by the SSE • Following an incident where this principal hazard is identified as a contributing factor • Following a change in the management structure that may affect this PHMP • Following a change in plant used or installed at the mining operation that may affect this PHMP A review of this PHMP should include a review of the risk assessment in relation to this principal hazard. Records of all reviews and revisions must be kept for at least twelve months from the date the mining operation is abandoned. OGNZL must, on request, provide these records to an inspector or a site health and safety representative. The SSE must organise for an external audit to be conducted at least once every three years from the date this document is approved by the SSE. The external audit should be carried out by a competent person who is independent of the mining operation. Details of the above audits should be retained for twelve months from the date at which the mining operation is abandoned.

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