13 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 Site ID1 Zone Description Proximity to WUG Site 6 – WUG Rise 3 Conservation (Indigenous Forest) with a perimeter fence restricting access to members of the public. Rise #1 and Rise #3 are fresh air intakes, only Rise #2 will exhaust air from the mine when the mine’s ventilation system is operational. Approximately 0.7 km from the WUG Class 1 store. 1. Site names updated for consistency with other reports. Two of the connections (2 & 3) are on OGNZL owned land at Willows Road, and three are located within the Coromandel Forest Park on the paper road. While there is an old walkway along the paper road (shown south of the WUG onFigure 3.3), this is not maintained as a public walkway and therefore not used by members of the general public. The surface connections in the Coromandel Forest Park are air vents or intakes, an example of which is included as Figure 3.5 below. The location of each surface connection will be securely fenced off to exclude members of the public from close proximity to the area. Figure 3.5: Typical return air rise vent Source: OGNZL 4 Control and management of hazardous substances 4.1 Introduction The key legislation in New Zealand for management of hazardous substances within the broader regulatory framework are: Health and Safety at Work (Hazardous Substances) Regulations 2017 (HSW-HS), which is administered by WorkSafe and sets rules for the storage and use of hazardous substances in the workplace, including risks to workers; Health and Safety at Work (Major Hazard Facilities) 2016 Regulations (HSW-MHF) which is also administered by WorkSafe and mandates specific duties relating to process safety that apply to facilities that exceed specified volumes of hazardous substances;
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