Supporting Technical Assessments

18 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 (UN Number) State Hazard Classification Proposed maximum volume Storage location and description Pre2021 Post-2021 Diesel Liquid 3.1D, 6.1E 6.3B 6.7B 9.1B Flammable liquids Category 4, Aspiration hazard Category 1, See Note 1. Carcinogenicity Category 2, Hazardous to the aquatic environment chronic Category 2 40,000 L Self-bunded isotainers 1 Skin irritation Category 3 (formerly Class 6.3B) has not been adopted in New Zealand.

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