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I B-6***PAW-9 Ground Water Well East of Mine Summary of WateTQualitY Data • <br />Parameters Year 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 <br />Depth, Mean feet 13.3 13.6 13.8 15.0 15.0 14.8 14.8 15.3 15.2 15.2 <br />Depth, Minimum feet 12.0 13.4 14.7 14.7 14.5 14.2 15.1 14.4 14.9 <br />Depth, Maximum feet 15.1 15.0 15.2 15.3 15.1 15.3 15.5 16.4 15.5 <br />PH Mean (field) standard 8.8 8.02 8.11 7.32 7.54 7.74 7.7 8.2 8.2 8.15 <br />PH, Minimum (field) standard 7.6 7.46 7.11 7.3 7.52 7.5 8.1 7.49 <br />H Maximum field standard 8.54 9.37 7.47 7.92 7.9 7.8 8.2 8.50 <br />H Lab standard 7.7 7.5 7.9 7.6 8.1 <br />Conductivity, Mean umhos/cm 4.63 659 547 694.75 696 597 576 666 791 866 <br />Conductivity, Minimum umhos/cm 595 507 550 526 492 503 608 682 <br />Conductivity, Maximum umhos/cm 737 608 789 819 666 649 1090 1060 <br />Temperature, Mean °C 13.3 15.8 14.7 11.4 10.9 10.5 11.9 12.7 12.2 12.5 <br />Temperature, Minimum °c 13.8 11.5 10.8 9.8 9.9 11.6 7.6 8.9 <br />Temperature, Maximum °c 19 16.2 11.7 12.4 11.6 12.2 15.4 13.8 <br />Dissolved Oxygen pm 1.45 <br />Iron (total) mg/1 1.21 8.85 0.61 0.67 2.15 7.27 8.99 1.41 1.63 <br />Iron (total recoverable) mg/1 0.69 1.87 8.16 1.41 <br />Iron dissolved mgn 0.1 0.05 0.16 0.47 0.3 0.18 <br />TSS mgn 15.25 201 12 8 <5 30 6 <br />TDS @ 180C mgn 492.5 470 430 440 450 410 390 390 400 <br />TDS (calculated) mg/1 505.5 494 458 458 433 403 385 410 <br />TCS mg/1 <br />Carbonate mg/1 <2 <2 <2 <2 <2 <2 <2 <2 <2 <br />Bicarbonate mgn 339.2 320 317 332 320 298 296 308 300 <br />Manganese mg/1 <br />Manganese (total) mg/1 0.17 0.286 0.151 0.155 0.169 0.155 0.176 0.187 0.117 <br />Manganese dissolved mgn 0.154 0.173 0.157 <.096 0.115 0.154 0.105 <br />Sodium mgn 70.6 73.9 <br />Sodium dissolved mg/1 71.2 75.5 67.5 68.2 57.9 70.3 68.8 <br />Chloride mgn 25 33 32 32 28 27 27 24 25 <br />Sulfate mg/1 91 90 60 50 50 40 40 30 40 <br />Calcium mgn 90.9 82.6 <br />Calcium dissolved mgn 84.4 81.5 77.1 72.8 67.9 63.2 77.9 <br />Magnesium mgn 19.3 16.7 13.2 14.9 <br />Magnesium dissolved mgn 16.4 16.4 15.1 14.1 12.0 14.6 13.3 <br />Potassium mg/1 3.15 2.9 <br />Potassium dissolved mg/1 2.9 2.8 2.7 2.8 2.5 3.1 2.8 <br />Hydroxide mgn <2 <2 <1 <2 <2 <2 <2 <br />Fluoride mgn 0.45 0.5 0.5 0.4 0.5 <br />Lead mg/1 0.02 0.04 <br />Lead dissolved mg/1 <.001 <.001 <.001 <.001 <.001 0.0001 <.0002 <br />Selenium Mg/1 <.001 <.001 <br />Selenium dissolved mgn 0.001 0.002 <.001 <.001 <.001 <.002 <.001 <br />Mercury mgn <br />SAR standard 1.86 2.08 1.88 2.02 1.86 1.94 1.72 2.1 1.89 <br />Settleable Solids mgn <br />Zinc mgn <.01 <.01 <br />Hardness mg/1 316 290 278 271 255 240 219 218 256