Supporting Technical Assessments

Quattro Column Testing - Analytical Results (Compacted) Sample Origin Sample Name 1790386 1791720 1792086 1792710 1793483 1794274 1794665 1795306 Date 9-Aug-18 16-Aug-18 23-Aug-18 30-Aug-18 6-Sep-18 13-Sep-18 20-Sep-18 27-Sep-18 4-Oct-18 11-Oct-18 18-Oct-18 25-Oct-18 1-Nov-18 8-Nov-18 15-Nov-18 22-Nov-18 29-Nov-18 6-Dec-18 13-Dec-18 20-Dec-18 27-Dec-18 3-Jan-19 10-Jan-19 17-Jan-19 Laboratory Reference 2036895.1 2052819.1 2060148.1 2067422.1 2081544.3 2089933.1 2097420.2 2102874.3 Week (Relative) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Week 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 pH pH Units 6.0 4.1 3.8 3.7 3.2 3.3 2.9 3 Acidity (pH 3.7) g/m3 as CaCO3 < 1.0 < 1.0 < 1.0 < 1.0 234 162 448 290 Total Alkalinity g/m3 as CaCO3 20 < 1.0 < 1.0 < 8 < 8 < 10 < 8 < 8 Electrical Conductivity (EC) mS/m 4.5 515 840 705 543 407 631 264 Dissolved Aluminium g/m3 0.028 49 107 70.7 72.2 Dissolved Antimony g/m3 0.0004 0.0029 0.003 0.00211 0.00134 Dissolved Barium g/m3 < 0.0005 0.019 0.027 0.01049 < 0.005 Dissolved Calcium g/m3 1.00 230 380 324 463 Dissolved Cobalt g/m3 0.0005 6.7 15.2 10.07 11.45 Dissolved Iron g/m3 0.39 310 780 573 614 Dissolved Magnesium g/m3 0.64 250 550 406 485 Dissolved Manganese g/m3 No Leachate No Leachate 0.0182 9.4 16.9 11.6 13.8 Dissolved Mercury g/m3 < 0.00008 < 0.00008 < 0.00008 < 0.0003 < 0.0003 < 0.00008 < 0.00008 < 0.00008 < 0.00008 Acid Soluble Mercury g/m3 Dissolved Molybdenum g/m3 < 0.0002 0.003 < 0.002 < 0.0010 < 0.0010 Dissolved Potassium g/m3 0.57 22 59 47.5 66.4 Dissolved Selenium g/m3 < 0.0010 0.163 0.043 0.0160 0.011 Dissolved Silver g/m3 < 0.00010 < 0.0005 < 0.0010 < 0.0005 < 0.0005 Dissolved Sodium g/m3 4.6 95 198 111 80.8 Dissolved Strontium g/m3 0.0043 3.0 6.1 4.08 5.24 Dissolved Uranium g/m3 < 0.00002 0.0039 0.081 0.0583 0.0562 Dissolved Vanadium g/m3 < 0.0010 < 0.005 0.175 0.167 0.324 Sulphate g/m3 5 2900 8000 6800 4460 6300 5150 1630 Dissolved Heavy Metals Dissolved Arsenic g/m3 0.025 0.012 0.017 0.031 0.040 0.0283 0.025 0.0272 0.013 Dissolved Cadmium g/m3 < 0.00005 0.0117 0.0196 0.048 0.039 0.0283 0.0196 0.0322 0.0109 Dissolved Chromium g/m3 0.0103 0.112 0.26 0.87 0.68 0.455 0.28 0.599 0.111 Dissolved Copper g/m3 0.0188 2.9 5.7 12.2 8.0 2.99 1.58 1.89 0.54 Dissolved Lead g/m3 < 0.00010 < 0.0002 < 0.0005 < 0.0010 0.0015 0.000876 0.0010 < 0.0005 0.0002 Dissolved Nickel g/m3 0.0009 2.1 3.4 8.1 7.4 4.67 3.1 5.38 1.77 Dissolved Zinc g/m3 0.147 2.6 4.6 10.8 9.3 6.56 4.6 7.84 2.3 Field Parameters pH pH Units 4.95 5.44 4.7 4 4.63 3.72 3.9 3.9 3.4 2.7 2.8 3.6 3 3 3.1 2.8 2.5 3.3 3.3 2.8 2.8 Electrical Conductivity (EC) mS/m 547 451 265 626 367 700 794 732 661 699 483 650 503 586 376 381 552 537 229 531 404 Temperature °C 11 14.1 11.2 15 19.7 13.8 12.1 16.9 16.3 19.7 13.4 18.6 20.9 20.3 24.8 19.7 25.9 26.7 22.3 26.6 24.8 Leachate Volume recovered mL 1000 1000 200 300 1000 300 600 500 250 1000 0 200 500 500 1000 1000 1000 200 300 100 200 Volume in bucket mL 500 500 0 200 500 1000 300 600 500 250 500 500 500 500 500 1000 500 250 500 1000 500 200 * 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. COL7

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