GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project D-6 Table 6 Mataura Trib 1 Analytes Units Count Minimum Maximum Alkalinity - Total g/m3as CaCO3 2 7.5 8.4 Aluminium-Dissolved g/m3 2 0.029 0.047 Antimony-Dissolved g/m3 2 0.0002 0.0002 Arsenic-Dissolved g/m3 2 0.001 0.001 Bicarbonate g/m3at 25°C 2 9.1 10.2 Boron-Dissolved g/m3 2 0.01 0.01 Cadmium-Dissolved g/m3 2 0.00005 0.00005 Calcium-Dissolved g/m3 2 1.37 1.59 Chloride g/m3 2 7 9 Chromium-Dissolved g/m3 2 0.0006 0.0007 Cobalt-Dissolved g/m3 2 0.0002 0.0002 Copper-Dissolved g/m3 2 0.0005 0.0005 Electrical Conductivity mS/m 2 5.3 6.1 Hardness-Total g/m3as CaCO3 2 7.1 8.6 Iron-Dissolved g/m3 2 0.04 0.06 Lead-Dissolved g/m3 2 0.0001 0.0001 Magnesium-Dissolved g/m3 2 0.9 1.11 Manganese-Dissolved g/m3 2 0.0033 0.025 Mercury-Dissolved g/m3 2 0.00008 0.00008 Molybdenum-Dissolved g/m3 2 0.0002 0.0002 Nickel-Dissolved g/m3 2 0.0005 0.0005 Nitrate-N g/m3 2 0.65 0.73 Nitrate-N + Nitrite-N g/m3 2 0.65 0.73 Nitrite-N g/m3 2 0.002 0.002 pH pH units 2 6.4 6.6 Potassium-Dissolved g/m3 2 1.15 1.25 Sodium-Dissolved g/m3 2 6.2 7.4 Sulphate g/m3 2 6 7 Zinc-Dissolved g/m3 2 0.001 0.003
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