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 21 of 44 Hazardous Substances Management Plan a. Reading and understanding the relevant Standard Operating Procedures (SOP) b. Reading and interpretation of material safety data sheet (SDS) contents • Practice in the safe use of plant including PPE necessary to manage the risks • The physiochemical and health hazards associated the hazardous substances the worker uses at work • The actions that the worker must take in an emergency involving hazardous substances • Workers obligations under the regulations Certified Handler training for any staff handling Class 6.1A and 6.1B – other than those working under the direction of a Certified Handler. Ensure sufficient approve handlers are trained to cover shift absences. 13 DEFINITIONS Term/Word Meaning ALARP As Low as Reasonably Practicable Certified Handler A person who holds a compliance certificate that indicates that person has competency as a certified handler (ref Reg 4.3). Previously known as Approved Handler. Change Management The process used to assess and assimilate all internally and externally driven changes in a routine but methodical fashion. ChemAlert OceanaGold’s Chemical Data Base administered by the Health and Safety Officer. It can be used to look up the SDS of a chemical and to track approved chemicals and storage locations at site. Compliance Certificate A certificate issued by a compliance certifier (Reg Sub part of Part 6). Previous know as Test Certificate. Consumer Product Means a hazardous substance that is packed or repacked for use by a household consumer for use in an office and is packed in a way and quantity in which it is intended to be used in an office. Competent Person For any task means a person who has acquired through training, qualification or experience, or a combination of them, the knowledge and skills to carry out that task. Controlled Substance Licence A licence issued by Worksafe NZ under Part 7 Continuous Improvement The process of enhancing a process, system or item, to achieve improvements in overall safety, performance, reliability, serviceability, efficiency, cost or other parameter in line with OceanaGold’s management philosophies. Dangerous Good Means substances or articles having the properties described in the Land Transport Rule, Dangerous Goods 2005 Rule 45001/1 - Table A: Properties and classification of dangerous goods for land transport, and substances or articles declared by the relevant authority to be dangerous goods for transport on land; and includes any packaging and empty containers that have been cleaned after containing dangerous goods. ERMA Environmental Risk Management Authority Event Realisation of a hazard External audit An audit in which the lead auditor, at the least, has no constant operational ties to the mine Hazard That which has the potential to cause harm or damage

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