Rory McNeill Reference No. 20148384_7407-012-LR-RevA_DRAFT OceanaGold Corporation 08 September 2021 8 change in elevation at approximately Walmsley Stream and could have associated low strength material and high permeability. Targeted drilling would require some more detailed mapping and terrain analysis to confirm suitable drilling locations. Drillholes in the area between the Waihi Fault and Willows Connection are expected to encounter similar materials to the Willows Road farm site investigations. For a prefeasibility study, we could probably avoid drilling further in this area, but an additional drillhole would help reduce the risk of unexpected ground conditions for the tunnel. Consideration could also be given to geophysical investigations to investigate the position of the Waihi Fault and the depth to various geological contacts along the tunnel alignment. Closure We hope this meets your requirement, should you have any questions please do not hesitate to contact the undersigned. Your sincerely GOLDER ASSOCIATES (NZ) LIMITED Latasha Templeton Tim McMorran Senior Engineering Geologist Principal Engineering Geologist CMENGNZ (PENGGEOL) 176867 LT/TM/jsb Attachments: Report Limitations https://golderassociates.sharepoint.com/sites/131361/project files/6 deliverables/012 lr_w2w tunnel/reva_draft/20148384_7407-012-lrreva_draft.docx D R A F T
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