GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project D-11 Table 10 WKP01 Water Quality Analytes Units Count Minimum Maximum Mean Median Alkalinity - Total g/m3as CaCO3 3 17.9 19.9 19.1 19.6 Aluminium-Dissolved g/m3 1 0.012 0.012 0.012 0.012 Antimony-Dissolved g/m3 1 0.0002 0.0002 0.0002 0.0002 Arsenic-Dissolved g/m3 3 0.0010 0.0010 0.0010 0.0010 Bicarbonate g/m3at 25°C 3 22 24 23 24 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 3.30 3.60 3.43 3.40 Chloride g/m3 3 9.00 10.00 9.67 10.00 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 7.50 7.60 Hardness-Total g/m3as CaCO3 3 14.9 16.7 15.8 15.7 Iron-Dissolved g/m3 3 0.02 0.03 0.02 0.02 Lead-Dissolved g/m3 1 0.0001 0.0001 0.0001 0.0001 Magnesium-Dissolved g/m3 3 1.61 1.90 1.75 1.74 Manganese-Dissolved g/m3 3 0.0005 0.0010 0.0007 0.0006 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 0.002 0.002 0.002 0.002 Nitrate-N + Nitrite-N g/m3 3 0.002 0.002 0.002 0.002 Nitrite-N g/m3 3 0.002 0.002 0.002 0.002 pH pH units 3 7.1 7.4 7.3 7.3 Potassium-Dissolved g/m3 3 1.20 1.34 1.28 1.30 Sodium-Dissolved g/m3 3 8.30 8.30 8.30 8.30 Sulphate g/m3 3 5.0 5.0 5.0 5.0 Zinc-Dissolved g/m3 1 0.001 0.001 0.001 0.001
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