This Technical Memorandum is provided as an interim output under our agreement with Oceana Gold NZ Ltd. It is provided to foster discussion in relation to technical matters associated with the project and should not be relied upon in any way. 12552081 2 Table 2.2 Whole Rock Geochemistry Sample Origin T-Stream EG-North EG-South Sample Name T-Stream (B1-SS3) EG-North (B2-SS3) EG-South (B3-SS3) Date and Time 11/24/2021 11/24/2021 11/24/2021 Laboratory Reference Unit WP21-09045 WP21-09045 WP21-09045 Total Sulphur (S) % 1.05 0.77 0.94 Total Carbon (C) % 0.03 0.02 0.02 Acid Neutralising Capacity (ANC) kg H2SO4/T 2.00 2.00 5.00 Acid Neutralising Capacity (ANC) % CaCO3 equiv. 0.20 0.20 0.50 Total Acid Producing (TAP) kg H2SO4/T 32.0 24.0 29.0 Total Acid Producing (TAP) kg CaCO3/T 32.7 24.5 29.6 Acid Producing kg H2SO4/T 32.13 23.56 28.70 Acid Producing % CaCO3 equiv. 3.28 2.40 2.93 Acid Neutralising Capacity / Total Acid Producing (ANC/PA Ratio) 0.06 0.08 0.17 Net Acid Producing Potential (NAPP) kg H2SO4/T 31.0 21.0 24.0 Net Acid Generation pH (NAG pH) pH unit 3.10 3.30 3.20 Net Acid Generation (NAG) kg H2SO4/T 30.0 21.0 25.0 NP kg H2SO4/T 2.33 1.67 1.58 NNP kg CaCO3/T -30.32 -22.82 -28.01 NPR Ratio % 0.07 0.07 0.05 Sulphide Sulphate (S-) % 0.83 0.62 0.78 S % 1.06 0.75 0.95 Al % 7.37 5.18 5.71 Fe % 1.33 1.32 1.64 Ca % 0.46 0.18 0.4 Mg % 0.12 0.04 0.15 Na % 0.07 0.15 0.13 K % 3.1 4.19 3.39 Sb ppm 7.6 11.5 9.23 As ppm 134.5 201 228 Ba ppm 390 600 630 Cd ppm 0.02 0.02 0.03 Co ppm 2.5 1.3 2.8 Cr ppm 9 7 10 Cu ppm 12.9 6.2 6.5 Pb ppm 15.8 11.4 10.7 Hg ppm 0.55 0.076 0.064 Mn ppm 79 90 216 Mo ppm 2 1.41 1.65 Ni ppm 3.1 1.6 2.6 Se ppm <1 <1 <1 V ppm 38 10 16 Zn ppm 13 19 32 Trace Elements Major Elements
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