GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North 76 Parameter Existing shallow groundwater quality (DH05a median) Predicted values after equilibration of NRS leachate with shallow groundwater Existing Ohinemuri River quality (OH3 median) Predicted values after mixing with Ohinemuri River Receiving water quality criteria Sb <0.0002 0.00030 <0.0002 <0.00020 0.03 Se <0.001 <0.001 <0.0002 <0.00020 0.02 Zn 0.016 <0.003 0.0019 0.0019 0.027 Notes: Receiving water quality criteria values for hardness 20 g/m3 CaCO3 Values in bold indicate an exceedance of the receiving water quality criteria * The mercury (Hg) criterion is lower than available laboratory detection limits
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