Supporting Technical Assessments

FINAL 221.00 VN, 50°, u, r, CA, dark alteration halo 224.00 VN, 80°, u, r, CA 225.00 VN, 40°, u, r, CN, trace QZ 225.20 JT, 18°, u, r, CN 226.30 VN, 50°, u, r, CA 227.00 JT, 60°, u, r, CA 227.35 VN, 60°, u, r, Py 227.50 JT, 65°, u, r, CA, dark allteration halo 228.00 VN, 60°, u, r, Py 228.10 VN, 85°, u, r, CA 228.85 - 228.90 SM, 70°, u, r, CLAY, altered weathered seam; trace calcite and rock fragments; pyrite at boundaries 229.32 VN, 70°, u, r, CA, dark alteration halo 222.03 222.70 223.40 226.63 227.40 229.83 WAIPUPU FORMATION Slightly weathered; grey; porphyritic ANDESITE; strong; widely spaced randomly orientated calcite veins (<2mm); some with dark alteration halos (continued from layer starting at 212.7m ) Slightly weathered; grey; LAPILLI TUFF (andesite); strong; poly-clastic; subangular to subrounded gravel sized clasts; minor cobble sized clasts; wide to very widely spaced randomly orientated calcite and pyrite veins (<2mm) 224.00 - 229.00 moderately wide to widely spaced randomly orientated calcite veins (<2mm) 228.30 - 228.60 moderately strong; some clay alteration UCS: 20 MPa - PLT 2.26 MPa - TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 87 TCR: 100 RQD: 93 221.3 PQTT PQTT PQTT PQTT PQTT PQTT PQTT SW SW Sample / Test 220 221 222 223 224 225 226 227 228 229 230 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) 221 222 223 224 225 226 227 228 229 RL (m) 17 16 15 14 13 12 11 10 9 8 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 : 23 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 Packer test 5: 222.70m - EOH PLT 1.06 MPa UCS 23 MPa UCS 12 MPa

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