GHD | Oceana Gold NZ Ltd | 12552081 | Geochemical Assessment Wharekirauponga Underground Mine (WAI985-000-REP-LC-0013) 29 When considering the conservatism built into the predicted arsenic concentration (from column leachate data), the generally depressed field column leachate concentrations of other WUG spoil elevated elements (relative to Martha) and the lower concentrations of other trace elements in the WUG soil dataset compared to the Martha dataset, the assumed water quality dataset adopted for water balance modelling in Table 4 is considered representative and suitable for use in the site wide water balance model.
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