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1 <br />1 <br />TABLE 3 <br />HISTORIC MINE AREA OVERBURDEN WATER QUALITY DATA <br /> 1987 1988 ]989 1990 1991 1992 <br />Temp (deg C) 7.5 8.3 9.5 8 8.8 9.8 <br />pH (su) 8.4 8.1 7.7 7.8 8.3 8.5 <br />E.C.(umho/cm) 2226 2513 2684 2195 1725 1650 <br />TDS 1194 1216 1132 1265 1311 1236 <br />SAR 32.64 35.61 36.25 43.61 32.03 34.67 <br />Ca 11 12 13 11 12 10 <br />Na 443 500 497 504 431 456 <br />Mg 2 2 2 < 1.0 3 2 <br />K 4 3 3 2 4 3 <br />504 147 150 128 <136 135 145 <br />CI 345 378 402 385 379 377 <br />CO3 0 4 0 12 0 23 <br />HCO3 389 400 386 382 405 367 <br />F - - - - - 1.0 <br />NO3/N 0.49 0.55 <0.478 <0.720 0.73 1.6 <br />Fe (dins) <0.028 0.07 <0.03 <0.025 0.01 0.15 <br />Mo (diss) <0.045 0.07 0.05 0.01 0.02 0.01 <br />AI <0.05 <0.05 <0.05 <0.05 0.05 0.04 <br />Ba 0.18 0.13 0.13 <0.165 0.17 0.20 <br />B 0.09 0.16 0.16 <0.020 0.11 0.11 <br />Cd <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <br />Cr <0.01 <0.01 <0.01 0.01 <0.01 <0.01 <br />c~ <0.02 <o.ol <o.ol <o.o1s <0.01 <o.ol <br />Pb <0.02 <0.02 <0.02 <0.025 <0.02 <0.02 <br />Hg <0.0002 <0.0001 <0.0001 0.0003 <0.0001 0.0002 <br />Mo <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <br />Ni <0.02 <0.02 <0.02 <0.02 ~<0.02 <0.02 <br />P (ortho) 0.035 0.080 0.080 <0.090 0.113 0.08 <br />V <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <br />Notec: All valua in mg/I unless otherwise Doted <br />Annual values represent the mean from welts 79.1 and 79-2 <br />G\~oa[V LLJ\p RR\nU.NYD <br />evou+> n.. <br />