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• <br />TABLE A-9***NEW4 Mine Shaft Center of Mine Summary of Water Quality Data <br />• <br /> STATISTICS <br />Parameters Year 1995 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Mean Minimum Maximum <br />Depth, Mean feet 351.3 346.6 340.1 334,9 330.0 325.4 318.1 313.4 309.6 307.2 304.5 302.1 302.6 303.0 304.0 <br />Change DepthNear 4.7 6.5 5.2 4.9 4.6 7.3 4.6 3.9 2.4 2.9 0.7 -0.4 1.0 13.0 2.4 7.3 <br />Depth, Minimum feet 349.8 343.8 332.6 333,0 328.1 322.2 315.4 311.4 308.7 306.2 303.3 301.6 302.5 303.9 306.2 <br />Depth, Maximum feet 352.8 348.8 348.6 338.5 331.9 327.6 320.5 315.2 311.0 308.0 305.1 302.6 302.7 304.2 352.8 <br />pH Mean (field) standard 8.4 7.86 7.7 7.71 7.55 7.47 7.3 7.6 8.17 8.05 7.9 8.0 8.05 8.15 7.81 <br />pH, Minimum (field) standard 8.4 7.37 7,49 7.5 7.31 7.05 7.3 7.6 7.7 7.99 7.9 7.52 7.05 <br />H Maximum field standard 8.8 8.87 8.1 8.1 7.78 7.47 7.3 7.6 8.4 8.1 8.1 7.98 8.87 <br />H Lab standard 81 8 7.9 8.00 <br />Conductivity, Mean umhos/cm 1364 1724 1426 2044 2190 2193 2510 1090 1383 2190 1885 2670 2630 1742 1975.15 <br />Conductivity, Minimum umhos/can 719 617 519 1500 1800 2010 893 1810 1505 1331.75 519 <br />Conductivity, Maximum umhoskrn 2010 2120 2690 2330 2540 2420 2840 2570 2640 2670 2630 2545.00 2840 <br />Temperature, Mean °c 13.7 19.7 18.4 16.5 16.6 12.4 11.7 12.4 13.74 14.65 13.5 16.9 16.1 15.5 15.24 <br />Temperature, Minimum °c 17.6 15.9 12.6 11.5 6.5 13 12.8 12.6 12.81 6.5 <br />Temperature, Maximum °c 22.6 18.4 19.1 22.3 15.4 17.5 16.5 16.2 18.50 22.6 <br />Dissolved Oxygen PPM 3.2 3.20 <br />Iron (total) mgn 0.62 0.39 0.12 0.07 0.62 0.46 0.16 0.26 0.32 0.51 0.32 0.07 0.62 <br />Iron (total recoverable) mgn 0.07 0.01 0.02 0.72 0.33 0.3 0.59 0.29 0.01 0.72 <br />Iron dissolved m 9A 0.04 0.02 0.06 0.75 0.78 0.79 <.01 0.02 0.03 0.04 <.02 0.31 <.01 0.78 <br />TSS mgn 36 12 <5 5 <5 36 26 <5 7 17.20 <5 36 <br />TDS c@ 180C mgn 1312 1390 1480 1480 1500 1500 1530 200 1590 1590 1570 1650 1650 1130 1404.62 1130 1650 <br />TDS (calculated) mgA 1470 1460 1440 1400 1520 1560 1620 1630 1580 1680 1536.00 1440 1690 <br />TCS m 50 50.00 <br />Carbonate mgA 4 <2 <2 <2 <2 <2 <2 <2 <2 <2 85 35 65 <2 85 <br />Bicarbonate m 1191 1380 1340 1340 1330 1440 1480 1500 1500 1440 1520 1420 929 1384.92 929 1500 <br />Manganese mgA <br />Manganese (total) mgn 0.02 0.015 0.016 0.011 0.007 0.041 0.034 4.1 0.037 0.013 <.005 0.016 0.019 0.39 0.007 4.1 <br />Manganese dissolved mg/I 0.01 0.007 0.009 0.013 <.005 3.8 0.028 0.006 <.005 <.005 <.005 0.64 <.005 3.8 <br />Sodium mgn 520 613 630 692 645.00 520 630 <br />Sodium dissolved 609 572 627 638 671 702 656 667 448 621.11 448 702 <br />Chloride mg/I 8 7 8 11 10 7 9 9 8 8 4 9 7 8.08 7 11 <br />Sulfate m 72.5 9 <10 <10 20 10 10 20 <10 <10 <10 56 49 24.86 9 72.5 <br />Calcium mgA 7 6.6 5.9 6.25 5.9 7 <br />Calcium (dissolved) mgA 6.2 6.2 8 7 7.5 9.5 7.6 7.7 7.2 17.9 8.48 6.2 9.5 <br />Magnesium mgA 3 3.2 3.1 4.2 3.50 3 4.2 <br />Ma nesium dissolved m 2.9 3.3 3.6 3.1 4.4 3.8 3.8 4.5 3.68 2.9 4.5 <br />Potassium mgA 4.5 5.6 5.6 5.60 4.5 5.6 <br />Potassium dissolved m 5.1 5.9 6.3 6.1 6.2 7.1 7.1 7 6.6 4.1 6.21 5.1 7.1 <br />Hydroxide mg/I <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <br />Fluoride m 1.3 2 2 2.6 0.23 1.71 0.23 2.6 <br />Lead mgn 0.02 0.05 0.04 0.045 0.02 0.05 <br />Lead dissolved m <.001 <.001 <.001 <.001 <.0002 0.000 <.0002 <.001 <br />Selenium mgA <.001 <.001 <.001 <br />Selenium dissolved m <.001 <.001 <.001 <.001 <.001 <.001 <br />SAR standard 42.06 49.6 52.9 51.2 46.7 46.8 51.1 50.4 47.8 51.5 48.9 50.6 24.8 47.69 42.06 52.9 <br />Settleable Solids mgn <br />Zinc mgA <br />Hardness mgA 29.5 30 27 29 35 30 34 42 35 35 34 63 35.82 27 42