Supporting Technical Assessments

WAI-985-000-REP-LC-0006_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-983000-REP-LC-0002. 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 3. Proposed Tailings Storage Facility Storage 3 RL155 Technical Report Rev 0’. EGL Ref: 8983. Doc ID: WAI-983-080-REP-CI-0012. 4. OceanaGold Waihi (2019) ‘Tailings Storage Facility Monitoring Plan’. Document ID: WAI-200-PLN-010. 5. Engineering Geology Ltd (June 2019). ‘Waihi Mine Northern Rock Stack, Geotechnical Factual Report – DRAFT’. EGL Report Ref: 8332. 6. GHD Pty Ltd (July 2021). Report prepared for Oceana Gold Ltd. ‘Waihi North Groundwater Assessment (Draft Report)’. GHD Ref: 12552081. Doc ID: WAI-985-000REP-LC-0012. 7. Buxton, R. and Langridge, R. (2017) ‘Seismic Design Spectra for Martha Hill Mine with Rock Ground Conditions’, GNS Science Consultancy Report 2017/177 8. Persaud, M., Villamor, P., Berryman, K.R., Ries, W., Cousins, J., Litchfield, N. and Alloway, BV. (2016) “The Kerepehi Fault, Hauraki Rift, North Island, New Zealand: active fault characterisation and hazard”, NZ Journal of Geology and Geophysics, Vol.59, No.1, 117-135. 9. New Zealand Society on Large Dams (2015) ‘New Zealand Dam Safety Guidelines’. ISBN: 978-0-908960-65-1. 10. GHD Pty Ltd (December 2020). Report prepared for Oceana Gold Ltd. ‘Project Quattro Final Draft – Water Management’. GHD Ref: 12552081. Doc ID: WAI-983-000-REP-LC0001_RevC. 11. Health and Safety at Work (Mining Operations and Quarrying Operations) Regulations 15 February 2016 (LI 2017/62). As at 7 August 2020; Under the Heath and Safety At Work Act 2015. 12. Waikato Regional Council. ‘Erosion and Sediment Control Guidelines for Soil Disturbing Activities’, January 2009 (updated 2014). Environment Waikato Technical Report No. 2009/02. ISSN 1177-9284 (online). 13. AECOM (October 2021). Report prepared for Oceana Gold (NZ) Ltd. ‘Waihi North Project Geochemical Assessment. Geochemistry of Tailings and Overburden, Treatment and Mitigation’. AECOM Ref: 60544823. Doc ID: WAI-985-000-REP-LC-0038_RevC.

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