Supporting Technical Assessments

EGL Ref: 8983 23 June 2022 Page 45 WAI-985-000-REP-LC-0004_Rev0.docx This report shall only be read in its entirety. REFERENCES 1. Engineering Geology Ltd (September 2021) ‘Oceana Gold (New Zealand) Ltd, Waihi Operation. Waihi North Project, Tailings Storage and Rock Disposal Volume 1. Natural Hazards and Options Assessment Technical Report’. EGL Ref: 9215. Doc ID: WAI-985000-REP-LC-0007. 2. GHD Pty Ltd (July 2021). ‘Gladstone Pit TSF Design Report, 22 July 2021 – Rev A DRAFT’. GHD Ref: 12537997. 3. Engineering Geology Ltd (September 2021). ‘Oceana Gold (New Zealand) Ltd, Tailings Storage and Rock Disposal Volume 4. Northern Rock Stack Proposed Rock Disposal Facility Technical Report DRAFT’. EGL Ref: 9018. Doc ID: WAI-983-080-REP-CI-0125. 4. New Zealand Society on Large Dams (2015) ‘New Zealand Dam Safety Guidelines’. ISBN: 978-0-908960-65-1. 5. Engineering Geology Ltd (September 2021) ‘Oceana Gold (New Zealand) Ltd, Waihi Operation, New Zealand. Storage 1A – Tailings Storage Facility Raise to RL182’. EGL Ref: 8981. Doc ID: WAI-985-000-REP-CI-0123. 6. OceanaGold Waihi (2019) ‘Standard Operating Procedure: Operations, Maintenance and Surveillance Manual’. Document ID: WAI-350-PLN-011. 7. New Zealand Society on Large Dams (2000), New Zealand Dam Safety Guidelines, November 2000 (superseded). Web site: www.ipenz.org.nz\nzsold\ 8. Engineering Geology Ltd (September 2021). ‘Oceana Gold (New Zealand) Ltd, Tailings Embankment Structure, Storage 2, 2021 Annual Inspection Report - DRAFT’ EGL Report Ref: 3748. ID: WAI-983-080-REP-CI-0049. 9. Engineering Geology Ltd (September 2021). ‘Oceana Gold (New Zealand) Ltd, Tailings Embankment Structure Storage 1A, 2021 Annual Inspection Report - DRAFT’ EGL Report Ref: 3748. Doc ID: WAI-983-080-REP-CI-0090. 10. OceanaGold Waihi (2019) ‘Tailings Storage Facility Monitoring Plan’. Document ID: WAI-200-PLN-010. 11. Pickford, Tony (June 2020). Report prepared for OceanaGold Corporation. ‘Waihi Gold Mine – Two Tailings Storage Facilities – Comprehensive Dam Safety Review. 12. Engineering Geology Ltd (June 2019) ‘Oceana Gold (New Zealand) Limited, Tailings Embankment Structure Storage 2 and Storage 1A, Failure Modes and Effects Analysis DRAFT’ EGL Ref: 3748. 13. Riley Consultants Ltd on behalf of Peer Review Panel (04 November 2021). Letter report prepared for Waikato Regional Council. ‘Annual Geotechnical Peer Review Report Tailings Embankment Storage 1A and 2; OceanaGold, Waihi’. Riley Ref: 12136-M. 14. OceanaGold Waihi (2021). ‘Tailings Storage Facility Annual Monitoring Report – Part C Underdrainage; April 2020 - March 2021’. Doc ID: WAI-200-REP-004. 15. OceanaGold Waihi (2021). ‘Tailings Storage Facility Annual Monitoring Report – Part D Groundwater; April 2020 - March 2021’. Doc ID: WAI-200-REP-005-03

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