Supporting Technical Assessments

FINAL 117.30 VN, 35°, u, r, CA, at clast boundary 110.50 113.20 115.00 WAIPUPU FORMATION Slightly weathered; grey; LAPILLI TUFF (andesite); strong, poly-clastic; angular to subangular gravel sized clasts; some cobble sized clasts (continued from layer starting at 104.1m ) 114.70 - 115.15 boulder of porphyritic andesite with flow banding 116.25 - 116.75 boulder of porphyritic andesite with calcite disseminated PLT 2.51 MPa PLT 1.84 MPa PLT 1.41 MPa TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 90 TCR: 100 RQD: 100 119.9 PQTT PQTT PQTT PQTT PQTT PQTT PQTT SW Sample / Test 110 111 112 113 114 115 116 117 118 119 120 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) 111 112 113 114 115 116 117 118 119 RL (m) 127 126 125 124 123 122 121 120 119 118 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 : 12 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 1.2.78 MPa Packer test 3: 107.30m - 117.30m 117.60 117.30

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