June 2022 G-14642.71-006-R-Rev0_FINAL 48 Abbreviation Definition OGC OceanaGold Corporation or any of its subsidiaries OPEX operating expenditure PFS Prefeasibility Study RAR return air raise PIC Potential Impact Category RDCL RDCL Engineering Limited S Sulphur SG specific gravity T metric tonne TBM Tunnel Boring Machine t/m3 tonnes per cubic metre Tpa Tonnes per annum WASM West Australian School of Mines Mci Waiwawa Subgroup VW Vibrating Wire WUG Wharekirauponga Underground Mine WQ water quality WRS Waste Rock Storage WSP WSP New Zealand Limited or any of its subsidiaries Wt Weight WTP water treatment plant
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