39 Tonkin & Taylor Ltd Hazardous Substances Technical Assessment – Waihi North Project - Waihi Processing Plant, Water Treatment Plant and Development Site Oceana Gold (New Zealand) Limited June 2022 Job No: 1015212.1000 vRev0 Substance Hazard Class Proposed maximum storage volume Delivery schedule Delivery volume Packaged explosive 1.1D, 6.1D, 6.3A,, 6.4A, 6.8C, 6.9A, 9.1A, 9.3C Detonators 1.1B 12,000 units Weekly 3,800 units 4.15 Waste management OGNZL has a Waste Management Plan in place for its Waihi operations17. The Waste Management Plan provides for all substances, hazardous and non-hazardous. In summary, it outlines the procedures for waste identification and segregation, disposal, transport of waste off-site, tracking of waste, and the auditing and reporting required. Under the HSMP the site teams must notify the health and safety manager (or delegate) prior to any disposal of hazardous substances. A disposal request, labelled the Chemical Disposal Form, form must be submitted. Disposal is undertaken in accordance with the relevant OGNZL Compliance Standards, and regional and local authority requirements. As mentioned in Section 3.3, water requiring treatment will be handled by the existing WTP. 17 OGNZL, September 2016, Waste Management Plan, WAI-200-PLN-004
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