Supporting Technical Assessments

Approved by: Process Manager Approval Date: 16/12/2021 Next Review: 16/122023 OceanaGold Waihi Document ID: WAI-250-PLN-003 Page 11 of 44 Hazardous Substances Management Plan Refer to the risk assessment standard for details on each process step; see Appendix I for document details. See Appendix II for the risk ranking tables. 4.4 Preventative and Corrective Actions To ensure that actions designed to prevent or correct substandard acts, conditions, programs and processes, or to implement opportunities, are properly managed and executed all operations have an Action Management System logged in INX Following the identification of deficiencies/opportunities, the system will: • Develop actions to address the root cause of the deficiency • Assign a unique identification number to facilitate tracking and close out of the issue • Assign a person(s) responsible for each action • Monitor progress against each action • Review effectiveness of the implemented action • Provide a means to identify the action has been effectively addressed and closed out 4.5 Communication The existence of this MP and its contents shall be communicated to all relevant personnel on site. Communication channels that exist on site include: 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 i i d 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.

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