Supporting Technical Assessments

Quattro Column Testing - Analytical Results (Limestone treated 19 Oct 17) Sample Origin Sample Name 1772448 1773337 1773979 1774187 1774400 1774637 1775210 1775469 1776285 1776576 1777006 Date 11-Aug-17 18-Aug-17 24-Aug-17 31-Aug-17 7-Sep-17 14-Sep-17 21-Sep-17 29-Sep-17 5-Oct-17 12-Oct-17 19-Oct-17 26-Oct-17 2-Nov-17 10-Nov-17 16-Nov-17 23-Nov-17 30-Nov-17 7-Dec-17 14-Dec-17 Laboratory Reference 1835335.6 1839708.6 1847569.6 1852490.6 1859544.6 1866803.6 1871033.6 1878876.6 1882573.6 1892103.6 Week (Relative) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Week 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 pH pH Units 3.8 4.1 3.7 3.8 3.2 3 2.9 3 2.7 2.4 Acidity (pH 3.7) g/m3 as CaCO3 < 1.0 < 1.0 < 1.0 < 1.0 39 114 500 920 780 1,490 Total Alkalinity g/m3 as CaCO3 < 1.0 < 8# < 8 #1 < 8 #1 < 8 #1 < 10 #1 < 10 < 10 #1 < 8 #1 < 8 Electrical Conductivity (EC) mS/m 502 118.2 180.9 168.5 236 272 399 313 365 425 Dissolved Aluminium g/m3 490 102 200 460 290 Dissolved Antimony g/m3 0.0021 0.0005 < 0.0004 < 0.0010 < 0.0010 Dissolved Barium g/m3 0.056 0.028 0.028 0.025 0.0137 Dissolved Calcium g/m3 330 96 132 163 163 Dissolved Cobalt g/m3 6.2 1.99 2.7 3.9 2.8 Dissolved Iron g/m3 77 5.9 15 153 103 Dissolved Magnesium g/m3 No Leachate No Leachate 147 50 74 81 50 Dissolved Manganese g/m3 9.6 2 2.7 5.9 2.8 Dissolved Mercury g/m3 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.0003 Dissolved Molybdenum g/m3 < 0.0010 < 0.0002 < 0.0004 < 0.0010 < 0.0004 Dissolved Potassium g/m3 74 55 60 52 31 Dissolved Selenium g/m3 0.119 0.022 0.029 0.027 0.012 Dissolved Silver g/m3 < 0.0005 < 0.00010 < 0.0002 < 0.0005 < 0.0005 Dissolved Sodium g/m3 79 27 7.3 4.4 2.4 Dissolved Strontium g/m3 2 0.54 0.63 0.89 0.7 Dissolved Uranium g/m3 0.061 0.0176 0.023 0.026 0.0193 Dissolved Vanadium g/m3 0.008 < 0.0010 < 0.002 0.016 0.009 Sulphate g/m3 5500 700 1240 1110 1830 2100 3400 2900 3200 3400 Dissolved Heavy Metals Dissolved Arsenic g/m3 0.02 0.0123 0.006 0.0022 0.002 < 0.002 < 0.005 0.004 0.003 0.107 Dissolved Cadmium g/m3 0.051 0.0096 0.0159 0.0145 0.0181 0.022 0.028 0.014 0.02 0.0121 Dissolved Chromium g/m3 0.141 0.0106 0.0148 0.0135 0.055 0.078 0.2 0.174 0.182 0.3 Dissolved Copper g/m3 4.5 0.86 1.39 1.39 2.6 2.1 3.9 2.2 2.7 2.1 Dissolved Lead g/m3 0.0092 0.0034 0.0106 0.0083 0.021 0.029 0.032 0.0105 0.0105 0.0051 Dissolved Nickel g/m3 4.3 0.8 1.35 1.35 1.91 2.2 2.9 1.52 2.1 1.54 Dissolved Zinc g/m3 5.4 0.99 1.7 1.56 2.6 3 4.5 3 4 3.7 Field Parameters pH pH Units 7.3 3.92 4.19 4.11 3.57 3.65 3 3.05 2.6 2.78 2.55 2.35 2.62 2.3 2.1 1.93 2.05 Electrical Conductivity (EC) mS/m 8.64 209 71.3 117.4 191.7 129 157 250.5 282.1 272 393 394 342 361 342 441 372 Temperature °C 13.6 17.5 14.7 19.7 15.8 11.5 17.7 15.7 12 14.4 17.5 17.3 16.1 20.9 20.1 22.9 26.8 Leachate Volume recovered mL 460 0 0 780 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 Volume in bucket mL 480 0 0 1200 7700 2500 1500 0 300 4000 0 0 1200 0 0 0 0 300 0 * Bucket overflowing. Volume assumed to be 20 L. # Due to the nature of sample, a 10 fold dilution was required for the Total Alkalinity analysis. This has resulted in a detection limit greater than that normally achieved. COL6 Treatment

RkJQdWJsaXNoZXIy MjE2NDg3