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Marc Mine - 2005 Annual Hydrology Report <br />February 2006 <br />TABLE 7 -SITE AO-2A HISTORIC MINE AREA ALLWIAL WATER QUALITY DATA <br /> AO-2 AO-2A <br />Anal a 1997 1998 1999 2000 2001 2002 2003 2004 2005 <br />Tem °C 9.3 7.4 9.3 10.7 10.0 9.8 10.7 10.0 11.3 <br />H su 7.5 7.6 7.6 7.6 7.4 7.6 7.7 7.6 7.7 <br />EC mhos/cm 20°C 638 871 1200 1300 1167 1063 633.3 333.3 200 <br />TDS 580 817 1060 1233 1037 977 620.0 680.0 600 <br />SAR in water 1.97 2.84 2.39 2.78 2.50 2.44 2.60 2.60 3.02 <br />Calcium dissolved 702 91.9 127.3 137.0 116 108.2 64.7 74.5 59.7 <br />Sodium dissolved 60 131 130 158 127 123 101.3 105.9 111.1 <br />Ma nesium dissolved 34.7 46.0 60.6 69.2 56.6 55.9 32.1 35.7 28.7 <br />Potassium dissolved 4.4 3.9 4.0 3.9 3.4 3.7 2.7 2.7 2.2 <br />Sulfate 153 280 490 617 527 453 237 257 173.3 <br />Chloride 5.5 11.7 16 18 14 13 9 11 3.7 <br />Carbonate as CaCO3 <2 <2 5.3 <2 <2 <2 <2 <2 <2 <br />Bicarbonate as CaCO3 302 373 317 319 272 279 262 283 378.3 <br />Fluoride 0.4 0.4 0.4 <br />Nitrate-Nitro en diss 0.53 028 0.14 0.18 0.10 0.09 0.06 0.04 0.58 <br />Iron dissolved 0.22 0.12 D.t0 0.07 0.20 0.24 0.33 027 0.17 <br />Man anese dissolved 0.35 0.80 0.81 0.67 0.80' 1.09 0.55 0.57 0.295 <br />Note: All values represent water year mean concentrations in mg/I unless otherwise noted. <br />Fde: 6371/2005/3005 hydrology apt Page 9 <br />