Oceana Gold Waihi North Project Waihi North Project Geochemical Assessment – Geochemistry of Tailings and Overburden, Treatment and Mitigation Revision 0 – 17-Jun-2022 Prepared for – Oceana Gold (New Zealand) Limited – Co No.: 2274246 13 AECOM Figure 4. Box plot showing range of calculated Acid Potential (AP) in rock material Box plot shows from highest node to lowest node: maximum / 75%ile / Median / 25%ile / minimum concentrations. AP calculation based on total Sulphur content. Data extending below 0 kg/tonne on the Y-axis are not shown. Figure 5. Box plot showing range of calculated Acid Neutralising Capacity/Maximum Potential Acidity (ANC/MPA) ratio in rock material (refer to Appendix A) Box plot shows from highest node to lowest node: maximum / 75%ile / Median / 25%ile / minimum concentrations. Data with a value below 0 on the Y-axis are not shown.
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