GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project D-12 Table 11 WKP02 Water Quality Analytes Units Count Minimum Maximum Mean Median Alkalinity - Total g/m3as CaCO3 3 17.9 20.0 19.0 19.2 Aluminium-Dissolved g/m3 1 0.015 0.015 0.015 0.015 Antimony-Dissolved g/m3 1 0.0002 0.0002 0.0002 0.0002 Arsenic-Dissolved g/m3 3 0.0010 0.0011 0.0010 0.0010 Bicarbonate g/m3at 25°C 3 22 25 23 23 Boron-Dissolved g/m3 1 0.009 0.009 0.009 0.009 Cadmium-Dissolved g/m3 1 0.00005 0.00005 0.00005 0.00005 Calcium-Dissolved g/m3 3 3.60 4.00 3.73 3.60 Chloride g/m3 3 9.00 9.60 9.20 9.00 Chromium-Dissolved g/m3 1 0.0005 0.0005 0.0005 0.0005 Cobalt-Dissolved g/m3 1 0.0002 0.0002 0.0002 0.0002 Copper-Dissolved g/m3 1 0.0005 0.0005 0.0005 0.0005 Electrical Conductivity mS/m 3 7.20 7.70 7.37 7.20 Hardness-Total g/m3as CaCO3 3 15.3 17.6 16.3 16.1 Iron-Dissolved g/m3 3 0.02 0.02 0.02 0.02 Lead-Dissolved g/m3 1 0.0001 0.0001 0.0001 0.0001 Magnesium-Dissolved g/m3 3 1.54 1.87 1.71 1.73 Manganese-Dissolved g/m3 3 0.0005 0.0019 0.0013 0.0016 Mercury-Dissolved g/m3 1 0.00008 0.00008 0.00008 0.00008 Molybdenum-Dissolved g/m3 1 0.0002 0.0002 0.0002 0.0002 Nickel-Dissolved g/m3 1 0.0005 0.0005 0.0005 0.0005 Nitrate-N g/m3 3 0.004 0.011 0.007 0.005 Nitrate-N + Nitrite-N g/m3 3 0.004 0.011 0.007 0.005 Nitrite-N g/m3 3 0.002 0.002 0.002 0.002 pH pH units 3 7.2 7.9 7.5 7.4 Potassium-Dissolved g/m3 3 1.19 1.30 1.25 1.26 Sodium-Dissolved g/m3 3 7.90 8.20 8.03 8.00 Sulphate g/m3 3 2.5 5.0 4.2 5.0 Zinc-Dissolved g/m3 1 0.001 0.001 0.001 0.001
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