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 10 of 27 3.1 Communication The existence of this PHMP and its contents shall be communicated to all relevant personnel on site. Communication channels that exist on site include: 4 ROLES AND RESPONSIBILITIES An “Authorised Person” is defined as someone who holds a current Approved Handlers Certificate, a current Controlled Substance Licence and is authorised with security for access to explosives. 4.1 Site Senior Executive The Site Senior Executive is responsible for workforce participation and consultation in the development of this PHMP, that the plan is reviewed and audited in accordance with section 9 of this PHMP and that it is communicated and made available to all employees. 4.2 Underground Mining Manager It is the responsibility of the Underground Mine Manager to ensure: • Operational compliance with this PHMP Start of shift meetings Pre shift safety meeting Crew safety meeting (min. one per month) Safety Representatives committee meeting Management Meetings Planned Task Observations tasks assigned to individuals and/or groups Current and expected hazards during shift identified Discuss plans and actions to ensure safe production achieved for shift Discuss hazards or issues from previous day Discuss hazards or issues for current day Classify day as A, B or C Discuss previous incidents and issues raised for the month Communicate actions from incidents / hazards that have been reported Open forum discussion with management team Safety reps from each department / area meet to discuss and raise safety concerns Reps raise issues brought to them from other mine workers Plans put in place to resolve any issues raised Daily review of safety performance Six monthly risk register review Formal annual review of the risk register Managers and supervisors interact with employees during task Feedback provided on safety performance and attitude Opportunity to raise task related concerns or questions Figure 3: Communication channels at OGNZL Waihi Operations.

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