5 Tonkin & Taylor Ltd Hazardous Substances Technical Assessment – Waihi North Project - Storage and use of hazardous substances at Willows Road site and the Wharekirauponga Underground Mine Oceana Gold (New Zealand) Limited June 2022 Job No: 1015212.1000 vRev0 Figure 2.3: Underground mine layout showing the key hazardous substance storage locations. Section looks west. Source: OGNZL 2.3 Hazardous substances classification and quantities The hazardous classifications for the substances are assigned under the Hazardous Substances and New Organisms Act 1996 (HSNO) and outlined inTable 2.1 below. As a new hazard classification system came into force in New Zealand on 30 April 2021, both the former classifications from the safety data sheet and the equivalent new classification are presented, as the former classification remain in use in the relevant regulations. Proposed location of explosives storage facility Varying surface connections where controlled zones apply. Proposed locations of ANE and gasser storage
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