GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North 66 Parameter Existing shallow groundwater quality (GLD04s) Predicted values after equilibration of TSF discharge with shallow groundwater Existing Ohinemuri River quality (OH6 median) Predicted values after mixing with Ohinemuri River Receiving water quality criteria SO4 17 263 148 149.0 Sb 0.0002 0.0007 0.00055 0.00055 0.03 Se <0.001 <0.001 <0.001 <0.001 0.02 Zn 0.13 0.12 0.0024 0.0028 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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