Supporting Technical Assessments

Quattro Column Testing - Analytical Results (layered) Sample Origin Sample Name 1791721 1792087 1792711 1793479 1794666 1795305 1795860 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 11-Jan-19 17-Jan-19 Laboratory Reference 2052819.2 2060148 2067422.2 2081544.2 2097420.3 2102874.2 2107812.1 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 3.9 3.1 2.8 2.9 3.2 3.1 2.9 Acidity (pH 3.7) g/m3 as CaCO3 < 1.0 380 360 340 249 180 250 Total Alkalinity g/m3 as CaCO3 < 1.0 < 1.0 < 8 < 8 < 8 < 8 < 8 Electrical Conductivity (EC) mS/m 515 381 391 334 304.0 230 318 Dissolved Aluminium g/m3 55 38 20.6 5.57 11.4 Dissolved Antimony g/m3 0.0033 0.0011 0.00057 < 0.0004 0.0002 Dissolved Barium g/m3 0.036 < 0.005 0.00763 0.01702 < 0.005 Dissolved Calcium g/m3 450 420 432 525 500 Dissolved Cobalt g/m3 7.8 5.4 3.06 0.969 1.11 Dissolved Iron g/m3 390 110 106.5 160 85 Dissolved Magnesium g/m3 330 220 148 75.9 76 Dissolved Manganese g/m3 No Leachate No Leachate 9.0 7.1 4.30 1.94 2.1 Dissolved Mercury g/m3 < 0.00008 < 0.0003 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 < 0.00008 Acid Soluble Mercury g/m3 Dissolved Molybdenum g/m3 < 0.0010 < 0.0010 < 0.0004 < 0.0004 < 0.0004 Dissolved Potassium g/m3 59 40 38.7 31.4 32 Dissolved Selenium g/m3 0.058 0.035 < 0.002 < 0.002 < 0.002 Dissolved Silver g/m3 < 0.0005 < 0.0005 < 0.0002 < 0.0002 < 0.00010 Dissolved Sodium g/m3 77 15.5 3.70 2.59 3.4 Dissolved Strontium g/m3 4.1 3.3 2.55 1.861 2 Dissolved Uranium g/m3 0.034 0.0194 0.00465 0.000767 0.0023 Dissolved Vanadium g/m3 0.046 0.015 0.0066 0.0068 0.006 Sulphate g/m3 4100 2800 2700 2240 2040 1353 2000 Dissolved Heavy Metals Dissolved Arsenic g/m3 0.075 0.051 0.015 0.019 0.00670 0.00213 0.004 0.003 Dissolved Cadmium g/m3 0.0159 0.023 0.0122 0.0117 0.00502 0.000628 0.00074 0.00112 Dissolved Chromium g/m3 0.24 0.26 0.37 0.38 0.166 0.031 0.045 0.110 Dissolved Copper g/m3 4.6 6.3 4.0 2.9 0.54 0.0577 0.058 0.061 Dissolved Lead g/m3 0.0016 0.0052 0.0047 0.0006 0.00197 0.00131 0.0004 0.0007 Dissolved Nickel g/m3 3.5 4.1 2.7 2.3 1.443 0.619 0.54 0.61 Dissolved Zinc g/m3 3.9 4.9 3.1 3.1 1.50 0.490 0.40 0.59 Field Parameters pH pH Units 4.27 4.39 4 3.84 3.5 3.2 3 2.5 2.5 2.8 2.4 2.8 2.7 2.8 2.7 2.9 3.1 3.4 2.7 2.6 2.7 Electrical Conductivity (EC) mS/m 428 420 451 471 401 361 390 366 338 369 370 288 327 276 197 269 251 189 279 292 280 Temperature °C 13.4 11.2 14.8 20.1 14.6 12.9 16.1 16.3 19.9 14.6 17.3 20.7 19.6 24.7 20.7 22.8 24.6 21.9 23.9 27.1 25.3 Leachate Volume recovered mL 1000 300 500 2500 0 850 250 1000 1000 1000 1000 1000 1000 1000 1000 200 300 1000 200 750 Volume in bucket mL 100 150 150 1000 500 500 1500 600 850 250 1000 1000 300 2500 500 35000 6000 1250 1500 3000 1000 0 1000 # 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. * Bucket overflowing. Volume assumed to be 20 L. COL8

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