GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North i LIMITATIONS This document provides the appendices for the Waihi North Groundwater Assessment WAI-985-000-REP-LC0012. These appendices must be reviewed in conjunction with the disclaimers and limitations provided within Section 1 of the main report. Table index Table A.1 Analytical suites 12 Table B.1 Bore details for all locations included in the assessment 15 Table C.1 Gladstone Groundwater Level Data 17 Table C.2 NRS Groundwater Level Data 17 Table C.3 TSF3 Groundwater Level Data 17 Table C.4 Minimum and maximum vertical hydraulic gradients – Gladstone Shallow Groundwater System 17 Table C.5 Minimum and maximum vertical hydraulic gradients – Gladstone Deep Groundwater System 17 Table C.6 Minimum and maximum vertical hydraulic gradients – NRS Shallow Groundwater System 17 Table D.1 Gladstone Permeability Test Data 21 Table D.2 NRS Permeability Test Data 21 Table D.3 TSF3 Permeability Test Data 21 Table E.1 Summary of Gladstone sampling to date 23 Table E.3 TSF3 sampling to date Table E.4 Summary of Gladstone groundwater quality 23 Table E.5 Summary of Gladstone surface water quality 23 Table E.6 Summary of NRS groundwater quality 23 Table E.7 Summary of NRS surface water quality 23 Table F.1 Summary of Gladstone Stream Flow Gauging results (Opus, 2019) 33 Table F.2 Summary of NRS Stream Flow Gauging results (Opus, 2019) 33 Table F.3 Summary of TSF3 Stream Flow Gauging Results (Opus, 2019) 33 Table F.4 Summary of historic surface water flow data used in the assessment 33 Table G.1 GOP and TSF assessment – model scenario summary 40 Table G.2 Gladstone pit perimeter section lengths for scaling flux across the pit boundary 43 Table G.3 Gladstone groundwater catchment areas 44 Table G.4 Gladstone Pit north - south model section parameters and boundary conditions 47 Table G.5 Gladstone Pit west – east model section parameters and boundary conditions 48 Table G.6 Gladstone Pit calibrated hydrogeological parameters 49 Table G.7 Gladstone Pit model calibration target groundwater levels (current conditions scenario) 50 Table G.8 Gladstone vein dewatering – model section perpendicular to vein boundary conditions 51 Table G.9 Gladstone vein dewatering – adopted hydrogeological parameters 51 Table G.10 Predicted groundwater discharge to surface water bodies during current conditions (SEEP/W) 56 Table G.11 Predicted groundwater discharge to surface water bodies during GOP excavation 56 Table G.12 Estimated inflows to GOP from shallow groundwater system during GOP excavation (SEEP/W) 57 23
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