Supporting Technical Assessments

UP UP UP UP 1.5% SLOPE 1.5% SLOPE HEAVY VEHICLE WASHBAY SEDIMENTATION PIT SLOPE 1.5% SLOPE 1.5% SLOPE UP UP UP 3 DS DS DS CT LA LA LA STAIRS SA SA SA LV LV LV NER SWITCH ROOM WORKSHOP SHELTER STORES WASH BAY // // // // // // // // // // // // // // // CRIB ROOM TUNNELING EQUIPMENT PARKING AREA ADMINISTRATION OFFICE CHANGE ROOM BREEZEWAY VEGETATION ZONE (BY OTHERS) CADASTRAL BOUNDRAIES CLEAN SW DIVERSION DRAIN CLEAN SW SWALE SURFACE FACILITIES RETENTION POND W RUNOFF ION DRAIN CLEAN SW TABLE DRAIN OUTLET RAW WATER TANKS 8m Ø 220m³ CAPACITY. POTABLE WATER TANK 2.6m Ø 10m³ CAPACITY. FUTURE POTABLE WATER TANK (PHASE 3) FUTURE RAW WATER TANK (PHASE 3) MBR SEWER TREATMENT FACILITY SECURITY & FIRST AID POST 6m x 6m MUSTER ROOM 1m HIGH BUND 1m HIGH BUND 3m HIGH NOISE BUND SW TABLE DRAIN 1m HIGH BUND A.N. EMULSION STORES LIGHT VEHICLE PARKING AREA ROAD RESERVE CORRIDOR ROCK LINED SW CHANNEL OVERLAND FLOW PATH FUTURE PARKING AREA (PHASE 3) FUTURE ADMINISTRATION OFFICE (PHASE 3) FUTURE CHANGE ROOM (PHASE 3) FUTURE CRIB ROOMS (PHASE 3) ROCK LINED SW CHANNEL WETLAND (SURVEY) WETLAND 20m OFFSET 80,000L DIESEL FUEL CONTAINER (SAFE FILL CAPACITY 75,600L) BUS SET DOWN AREA VEHICLE WHEEL WASH GASSER STORE This Drawing must not be used for Construction unless signed as Approved Date Check Drafting Date Drawn Revision No A1 Rev: Drawing No: Original Size Title Project Check Designer Drafted Scale Design Note: * indicates signatures on original issue of drawing or last revision of drawing Approved Checked Appvd. Cad File No: 3 December 2021 - 9:57 AM \\beca.net\projects\221\2210835\CAD\C3D\Design_WKP Mine\Production Drawings\2210835-CA-1111.dwg Plotted By: Hamish Kerr PRC No.: PTR No.: TIN No.: Date issued.: Date issued.: Issued at.: Sheet No. Drawings as an instrument of service are the property of OceanaGold, and, as such, must not be reproduce or copied in part or in full without permission. All drawing are to be return when no longer in use. BECA DWG No: 2210835-CA-1111 WHAREKIRAUPONGA EXPLORATION DECLINE PROJECT INFRASTRUCTURE DESIGN LAYOUT WAI-981-000-DWG-CI-1111 D AWS AWS PJG - 1:500 @ A1 A FOR INFORMATION CP PJG PJG 11.03.21 B ISSUED FOR PFS AMR JVZ PJG 14.05.21 C FOR INFORMATION - WETLANDS OFFSET UPDATE AMR 02.07.21 D FOR INFORMATION - WWTP, LV WHEEL WASH, BUS STOP UPDATES HEK JVZ JVZ 26.11.21 2210835 Engineer: P. GLOWREY LEGEND: PHASE 1 & 2 INFRASTRUCTURE FOR INFORMATION NOT FOR CONSTRUCTION PHASE 3 INFRASTRUCTURE

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