Supporting Technical Assessments

FINAL 130.35 VN, 30°, u, r, CA 130.75 JT, 48°, u, sm, CA, trace Py 130.95 VN, 55°, u, r, Py, trace other sulphides 132.80 VN, 76°, u, r, Py, trace CLAY and Ca 133.00 JT, 70°, u, r, CLAY 133.55 JT, 20°, u, r, CLAY 133.75 VN, 80°, u, r, CA 133.85 VN, 70°, u, r, CA, dark alteration halo 134.10 VN, 38°, u, r, CA, dark alteration halo 134.20 VN, 40°, u, r, CA, dark alteration halo 134.40 VN, 65°, u, sm, CA 134.55 VN, 20°, u, r, CA, dark alteration halo 134.70 VN, 65°, u, sm, CA 134.85 VN, 55°, st, r, CA 135.10 VN, 65°, u, sm, CA 135.50 VN, 50°, u, r, CA, trace Py 135.80 VN, 60°, u, sm, CA 135.93 VN, 60°, u, sm, CA, trace Py 136.22 VN, 65°, u, r, Py, with Ca; 20-30mm 136.60 VN, 60°, u, r, Py, with Ca 136.90 VN, 70°, u, r, CA, trace CLAY; 15-25mm 138.85 VN, 30°, u, sm, CA 138.98 VN, 40°, u, sm, CA 139.04 VN, 45°, u, sm, CA 139.32 VN, 60°, u, r, CA 139.45 VN, 30°, u, sm, CA 130.10 135.40 138.50 139.80 WAIPUPU FORMATION Slightly weathered; pale grey; porphyritic ANDESITE; moderately strong; some clay alteration; moderately wide to widely spaced randomly orientated calcite and pyrite veins (<2mm); some drilling disturbance (continued from layer starting at 128.8m ) 131.35 - 132.20 drilling disturbance 131.40 - 131.55 cobble of pale grey porphyritic andesite with clay altered boundaries 131.60 moderately strong; increased clay alteration; drilling disturbance Slightly weathered; grey; porphyritic ANDESITE; strong; predominantly closely to moderately widely spaced randomly orientated calcite and pyrite veins (<2mm); some with dark alteration halos 137.80 - 138.50 recovered as gravel sized fragments - some drilling disturbance PLT 0.45 MPa - PLT 4.85 MPa - PLT 5.12 MPa - TCR: 100 RQD: 100 TCR: 100 RQD: 94 TCR: 100 RQD: 80 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 73 TCR: 100 RQD: 100 TCR: 100 RQD: 100 133.5 PQTT PQTT PQTT PQTT PQTT PQTT PQTT PQTT SW SW Sample / Test 130 131 132 133 134 135 136 137 138 139 140 20 60 200 600 2000 Estimated Strength (MPa) Defect Spacing (mm) Description (and sub Detail) Visual Defect Result Geological Unit Material Description Number / Type EW VW W MS S VS ES TCR RQD SCR (%) Depth (m) 131 132 133 134 135 136 137 138 139 RL (m) 107 106 105 104 103 102 101 100 99 98 Graphic Notes and Comments: Refer to explanation sheets for abbreviation and symbols. Shear Vane values are corrected. Ground Water Level Time Date Reading Hole depth (mbgl) (mbgl) Equipment: RIG 83 Orientation: 0° Inclination: -90° End of Hole @ 231.7m Vibrating Wire Piezometers at 49.00m, 142.00m, 217.00m PLT are corrected to Is(50) Contractor: Alton Drilling Ltd Casing Method Commenced: 29/07/2020 Easting: 2762466.08 Hole No. : WNDD007 Completed: 11/08/2020 Sheet : 14 of 24 Hole Length : 231.7 Project : WKP Exploration Tunnel - Ground Investigations Client : OceanaGold Corporation Job Number: 12533958 Processed : HJ System: NZMG Northing: 6424304.837 Checked : JHS Datum: NZVD2016 Logged : HJ Site : Willows Farm, Waihi North, Scale @ A4 : 1:50 Method: SURVEY RL: 237.07 m Flush Return (%) 25 50 75 Weathering Instrumentation Installation Water level Report ID: ROCKLOG || Project: WNDD007.GPJ || Library: GHD - NZGD.GLB || Date: 15 September 2021 PLT 3.13 MPa

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