Supporting Technical Assessments

Oceana Gold Waihi North Project Waihi North Project Geochemical Assessment – Geochemistry of Tailings and Overburden, Treatment and Mitigation Revision 0 – 17-Jun-2022 Prepared for – Oceana Gold (New Zealand) Limited – Co No.: 2274246 AECOM Waihi North Project Geochemical Assessment Geochemistry of Tailings and Overburden, Treatment and Mitigation Client: Oceana Gold (New Zealand) Limited Co No.: 2274246 Prepared by AECOM New Zealand Limited 8 Mahuhu Crescent, Auckland 1010, PO Box 4241, Auckland 1140, New Zealand T +64 9 967 9200 F +64 9 967 9201 www.aecom.com 17-Jun-2022 Job No.: 60544823 AECOM in Australia and New Zealand is certified to ISO9001, ISO14001 AS/NZS4801 and OHSAS18001. © AECOM New Zealand Limited (AECOM). All rights reserved. AECOM has prepared this document for the sole use of the Client and for a specific purpose, each as expressly stated in the document. No other party should rely on this document without the prior written consent of AECOM. AECOM undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document. This document has been prepared based on the Client’s description of its requirements and AECOM’s experience, having regard to assumptions that AECOM can reasonably be expected to make in accordance with sound professional principles. AECOM may also have relied upon information provided by the Client and other third parties to prepare this document, some of which may not have been verified. Subject to the above conditions, this document may be transmitted, reproduced or disseminated only in its entirety.

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