Supporting Technical Assessments

Quattro Column Testing - Analytical Results (Saturated from 19 Oct 17) Sample Origin Sample Name 1772444 1773333 1773975 1774183 1774396 1774633 1775206 1775465 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 Laboratory Reference 1835335.2 1839708.2 1847568.2 1852490.2 1859544.2 1866803.2 1871033.2 Week (Relative) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Week 1 2 3 4 5 6 7 8 9 10 11 12 13 14 pH pH Units 4.5 4.1 3.8 3.4 2.9 2.8 2.8 Acidity (pH 3.7) g/m3 as CaCO3 < 1.0 < 1.0 < 1.0 - 290 240 370 Total Alkalinity g/m3 as CaCO3 < 1.0 < 8# < 8 #1 < 8 #1 < 8 #1 < 10 #1 < 10 Electrical Conductivity (EC) mS/m 374 294 363 400 429 437 439 Dissolved Aluminium g/m3 13.7 25 52 39 Dissolved Antimony g/m3 0.003 0.0005 0.0015 0.0011 Dissolved Barium g/m3 0.076 0.039 0.039 0.0198 Dissolved Calcium g/m3 430 450 540 480 Dissolved Cobalt g/m3 2.8 3 4.1 3.2 Dissolved Iron g/m3 34 0.96 163 210 Dissolved Magnesium g/m3 No Leachate No Leachate 176 188 270 190 Dissolved Manganese g/m3 8.6 7.6 11.4 9.4 Dissolved Mercury g/m3 < 0.00008 < 0.00008 < 0.00008 < 0.00008 0.00025 < 0.00008 < 0.00008 Dissolved Molybdenum g/m3 < 0.0004 < 0.0004 < 0.0010 < 0.0010 Dissolved Potassium g/m3 60 69 61 50 Dissolved Selenium g/m3 0.3 0.106 0.055 0.032 Dissolved Silver g/m3 < 0.0002 < 0.0002 < 0.0005 < 0.0005 Dissolved Sodium g/m3 141 89 38 16.3 Dissolved Strontium g/m3 2.6 2.6 2.9 2.7 Dissolved Uranium g/m3 0.0122 0.024 0.031 0.022 Dissolved Vanadium g/m3 < 0.002 < 0.002 0.056 0.049 Sulphate g/m3 2600 1980 2400 2900 3200 3000 2800 Dissolved Heavy Metals Dissolved Arsenic g/m3 0.03 0.011 < 0.010 0.007 0.043 0.01 0.022 Dissolved Cadmium g/m3 0.0133 0.0097 0.0138 0.016 0.0162 0.0175 0.0151 Dissolved Chromium g/m3 0.0175 0.005 0.0143 0.028 0.117 0.09 0.102 Dissolved Copper g/m3 3.5 2.6 3.6 4.4 6.1 4.7 4.8 Dissolved Lead g/m3 0.0014 0.0018 0.0047 0.0074 0.0157 0.01 0.0074 Dissolved Nickel g/m3 1.47 1.09 1.55 1.87 2.3 2.1 1.86 Dissolved Zinc g/m3 1.75 1.25 1.85 2.1 2.9 2.6 2.6 Field Parameters pH pH Units 7.17 4.81 4.34 3.77 3.59 3.2 2.6 2.7 2.38 2.56 2.43 2.28 Electrical Conductivity (EC) mS/m 6.47 184.9 121.2 208 388.7 356 434 407.2 520 429 428 458 Temperature °C 13.6 16.9 15.4 15.9 14.7 11.7 17.2 16 14.9 14.4 18.5 19 Leachate Volume recovered mL 90 0 0 520 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 Volume in bucket mL 0 0 0 2800 2500 1800 1400 1200 0 5500 0 0 0 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. COL2 Treatment

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