Supporting Technical Assessments

FINAL TOPSOIL RESIDUAL SOIL WHIRITOA ANDESITE SILT with some sand; dark brown. Very soft; moist; low plasticity; trace rootlets; sand, fine to medium (TOPSOIL) Sandy silty CLAY; brown. Firm; moist; high plasticity; sand, fine (RESIDUAL SOIL - ALLOPHANE) 0.50 becomes orangish brown 1.80 becomes stiff CLAY with some sand and silt; orange brown. Stiff; moist; high plasticity; sand, fine Completely weathered; grey speckled orange and white; locally stained black; massive welded TUFF; extremely weak (WHIRITOA ANDESITE) 7.50 becomes very weak CORE LOSS Completely weathered; grey speckled orange and white; locally stained black; massive welded TUFF; very weak End of Hole @ 9.6m, TD 10-11-2020 0.10 2 3.6 8.175 8.825 CW VS F St St M M M HQTT HQTT SPT HQTT SPT HQTT SPT HQTT SPT HQTT SPT HQTT SPT SPT 1/0 2/2 2/3 N = 9 SPT 1/1 3/3 2/2 N = 10 SPT 1/4 4/4 6/4 N = 18 SPT 4/7 8/10 10/18 N = 41 SPT 3/8 9/17 24 for 75mm N > 50 SPT 1/5 16/34 for 75mm N > 50 1.10 1.35 D-D1 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 100 TCR: 36 TCR: 100 0 1 2 3 4 5 6 7 8 9 10 Geological Unit Material Description Instrumentation Installation Commenced: 9/11/2020 Easting: 2763442.597 Hole No. : WFBH008 Completed: 9/11/2020 Sheet : 1 of 1 Hole Length : 9.6 Project : WKP Exploration Tunnel - Ground Investigation Client : Oceana Gold Corporation / GWS / Golder Job Number: 12533958 Processed : HJ System: NZMG 1949 Northing: 6423517.155 Checked : JHS Datum: NZVD2016 Logged : HJ Site : Willows Farm, Waihi North, Scale @ A4 : 1:50 Method: SURVEY RL: 229.71 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 10/11/20 07:00 5.7 9.6 End of Hole @ 9.6m Magazine Compound Area Lost water return at 6.3m Contractor: Alton Drilling Ltd Depth (m) 1 2 3 4 5 6 7 8 9 RL (m) 229 228 227 226 225 224 223 222 221 220 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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