GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project 50 Figure 32 Waihi WBM Outline The cumulative component of the WBM is detailed in Appendix D and accounts for the following: Background water quality and flow WTP discharge water quality and flow Uncaptured mass loads from the existing operations Predicted uncaptured mass loads from WRS, NRS, TSF3 and GOP TSF The additional contaminant loads that are predicted to report to the Ohinemuri via groundwater have been quantified in the Hydrogeological assessment (GHD, 2022) and are included within the cumulative assessment for the following facilities: • WRS Seepage • TSF3 Seepage • NRS seepage • Gladstone seepage Existing and additional loads used the assessment are provided in Table 12. Table 12 Additional Ohinemuri Loading (kg/day) Baseline WRS Gladstone Pit* NRS TSF3 Al - <0.01 - 1.2 <0.01 As <0.01 <0.01 - <0.01 <0.01 Ca <0.01 <0.01 - 47 1.0 Co <0.01 <0.01 - 0.2 <0.01
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