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 27 of 27 APPENDIX IV – CHECK LIST FOR ENSURING COMPLIANCE TO REGS The principal hazard management plan for explosives must, at a minimum, address the following matters: Location in Document (a) transportation of explosives at the mining operation: 5.2,6.1 (b) explosive precursors: 5.1 (c) inspection of and reporting on the safety of equipment used at the mining operation for manufacturing, storing, transporting, and delivering explosives: 5.6,7 (d) the appropriate action to be taken to make safe the equipment mentioned in paragraph (c): 7 (e) how explosives brought into the mining operation and used at the mining operation will be accounted for: 5.2,5.6 (f) how explosives will be checked for any deterioration in the explosives and isolated if they have deteriorated: 5.5,5.6 (g) the establishment of secure storage for explosives at the mining operation, including a system for signing explosives in and out of storage: 5.2,5.3,5.4 (h) in the case of underground mining operations and tunneling operations, a process to remove explosives from underground at the operation unless there is an approved facility to store the explosives underground: 6.1 (i) the identification and control of hazards that may arise— (i) during the charging and firing of explosives; and (ii) in particular places, including, for example, in a storage bin feeder in which an explosive is to be used to clear a blockage: 6.2.2 (j) the establishment of declared danger zones that no person may enter while blasting operations are taking place: 6.2,6.3 (k) the procedure to find, recover, and detonate misfired explosives: 6.5.2,6.4.5 (l) a record to be kept of misfired explosives: 6.4.5 (m) a register of people at or providing a service to the mining operation who are approved handlers under the Hazardous Substances and New Organisms Act 1996 to handle explosives: 4 (n) the co-operation required between the mining operation and any person authorised under the Hazardous Substances and New Organisms Act 1996 regarding the safety of the storage, handling, transportation, and use of explosives at the mining operation, including compliance with any conditions attached to the authorisation under the Hazardous Substances and New Organisms Act 1996 of the person handling the explosive. 1.,2

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