Supporting Technical Assessments

FINAL WAIPUPU FORMATION Completely weathered; grey; massive; porphyritic ANDESITE; extremely weak with clay altered phenocrysts; argilic alteration; calcite, pyrite and hematite alteration (WAIPUPU FORMATION) (continued from layer starting at 9.0m ) 16.00 - 16.50 VN, 75°, u, r, N, CA End of Hole @ 16.85m, Target Depth CW HQTT SPT HQTT SPT HQTT SPT HQTT SPT HQTT SPT SPT 3/2 5/6 8/8 N = 27 SPT 3/4 4/5 7/7 N = 23 SPT 7/10 13/19 18 for 60mm N > 50 SPT 3/5 14/15 17/4 for 70mm N > 50 SPT 5/7 15/21 14 for 50mm N > 50 15.40 15.60 C-C1 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 10 11 12 13 14 15 16 17 18 19 20 Geological Unit Material Description Instrumentation Installation Commenced: 11/09/2020 Easting: 2762593.666 Hole No. : WFBH013 Completed: 15/09/2020 Sheet : 2 of 2 Hole Length : 16.85 Project : WKP Exploration Tunnel - Ground Investigation Client : Oceana Gold Corporation / GWS / Golder Job Number: 12533958 Processed : HJ System: NZMG 1949 Northing: 6424370.633 Checked : JHS Datum: NZVD2016 Logged : HJ Site : Willows Farm, Waihi North, Scale @ A4 : 1:50 Method: SURVEY RL: 205.2 m Water level 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: Tractor Rig, (Rig 83) Orientation: Inclination: Vertical 03/09/20 08:00 3.12 16.85 End of Hole @ 16.85m Mataura Stream Piezo No water return information Contractor: Alton Drilling Ltd SPT ETR: 81% Depth (m) 11 12 13 14 15 16 17 18 19 RL (m) 195 194 193 192 191 190 189 188 187 186 Graphic Report ID: GENERAL_LOG-BK1 || Project: WILLOWS FARM BHS.GPJ || Library: GHD - NZGD.GLB || Date: 10 May 2021 Weathering Flush Return (%) 25 50 75 Consistency / Relative Density Moisture condition Casing Method Result Sample Number / Type Estimated Strength (MPa) Defect Spacing (mm) EW VW W MS VS ES 20 60 200 600 2000 TCR SCR RQD (%)

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