Supporting Technical Assessments

FINAL TOPSOIL RIVER TERRACE DEPOSITS WHIRITOA ANDESITE SILT with some sand; dark brown. Very soft; moist; low plasticity; trace rootlets; sand, fine to medium (TOPSOIL) Sandy SILT; brown. Very soft; moist; high plasticity; trace rootlets (RIVER TERRACE DEPOSITS) CORE LOSS GRAVEL with cobbles and boulders; grey. Moist; dense; gravel, fine to coarse, sub angular to sub rounded; cobbles and boulders, slightly weathered, strong, porphyritic andesite. Fine matrix possibly washed out during drilling. 2.00 becomes medium dense CORE LOSS Completely weathered; pale whitish brown speckled black locally stained orange; massive welded TUFF; extremely weak; partially recovered as gravel sized fragments (WHIRITOA ANDESITE) CORE LOSS Completely weathered; pale whitish brown speckled black locally stained orange; massive welded TUFF; extremely weak; partially recovered as gravel sized fragments CORE LOSS (inferred soft ground) Completely weathered; pale whitish brown speckled black locally stained orange; massive welded TUFF; extremely weak; partially recovered as gravel sized fragments CORE LOSS Completely weathered; pale whitish brown speckled black locally stained orange; massive welded TUFF; extremely weak; partially recovered as gravel sized fragments End of Hole @ 7.95m, TD 1-09-2020 23-09-2020 0.2 0 0.5 0.9 2.62.45 3.45 3.9 5.045.95 6.45 6.67 CW VS VS D MD M M M HQTT SPT HQTT SPT HQTT SPT HQTT SPT HQTT HQTT SPT HQTT SPT SPT 2/2 6/12 11/18 N = 37 SPT 2/4 5/5 4/5 N = 19 SPT 2/4 5/4 4/6 N = 19 SPT 1/4 5/5 4/7 N = 17 SPT 2/1 4/4 5/5 N = 18 SPT 2/1 4/3 4/5 N = 16 TCR: 56 TCR: 100 TCR: 73 TCR: 57 TCR: 71 TCR: 100 TCR: 79 0 1 2 3 4 5 6 7 8 9 10 Geological Unit Material Description Instrumentation Installation Commenced: 1/09/2020 Easting: 2763792.346 Hole No. : WFBH006-D Completed: 1/09/2020 Sheet : 1 of 1 Hole Length : 7.95 Project : WKP Exploration Tunnel - Ground Investigation Client : Oceana Gold Corporation / GWS / Golder Job Number: 12533958 Processed : HJ System: NZMG 1949 Northing: 6423908.639 Checked : JHS Datum: NZVD2016 Logged : HJ Site : Willows Farm, Waihi North, Scale @ A4 : 1:50 Method: SURVEY RL: 151.013 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 01/09/20 09:00 1.58 3.45 01/09/20 11:00 1.78 6.45 01/09/20 12:00 1.62 7.95 23/09/20 10:38 2.69 7.95 End of Hole @ 7.95m Silt Pond Dam Area Contractor: Alton Drilling Ltd SPT ETR: 81% Depth (m) 1 2 3 4 5 6 7 8 9 RL (m) 150 149 148 147 146 145 144 143 142 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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