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Table: 15A <br />Williams Fork Mine <br />2017 Annual Hydrology Report <br />Period of Record <br />Site: AV3, Well AVF-3 , Williams Fork Alluvium Datum: 6137.95 <br />Type <br />Parameter <br />Fraction <br />Units <br />Date Range <br />Sample Count Average <br />Median <br />Maximum <br />Minimum <br />STDEV <br />FIELD <br />pH, Field <br />N <br />S.U. <br />1/26/1982 <br />11/15/2017 <br />135 <br />7.42 <br />7.4 <br />8.7 <br />6.8 <br />0.285 <br />FIELD <br />Specific Conductivity, Field <br />N <br />UMHOS/CM <br />1/26/1982 <br />11/15/2017 <br />135 <br />1698.508 <br />1680 <br />2750 <br />880 <br />297.1142 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />5/27/1982 <br />11/15/2017 <br />131 <br />9.23 <br />9 <br />18.5 <br />3.7 <br />2.91 <br />PHYSICAL <br />Alkalinity as CaCO3, @ pH 4.5 <br />N <br />MG/L <br />6/29/1981 <br />11/15/2017 <br />93 <br />424 <br />410 <br />980 <br />322 <br />88.1 <br />PHYSICAL <br />Hardness <br />N <br />MG/L <br />3/16/1992 <br />11/15/2017 <br />16 <br />551 <br />5501 <br />661 <br />508 <br />38.6 <br />PHYSICAL <br />Hydroxide as OH <br />N <br />MG/L <br />8/14/1991 <br />11/15/2017 <br />38 <br />9 <br />2 <br />20 <br />0 <br />9 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />6/29/1981 <br />11/15/2017 <br />100 <br />7.75 <br />7.7 <br />8.4 <br />7.18 <br />0.324 <br />PHYSICAL <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />6/29/1981 <br />11/15/2017 <br />100 <br />1794 <br />1790 <br />2700 <br />920 <br />326.6 <br />ANION <br />Alkalinity, Bicarbonate as CaCO3 <br />N <br />MG/L <br />3/16/2009 <br />11/15/2017 <br />14 <br />520 <br />524 <br />601 <br />441 <br />36.5 <br />ANION <br />Chloride <br />N <br />MG/L <br />6/29/1981 <br />11/15/2017 <br />100 <br />218 <br />190 <br />2300 <br />9 <br />234 <br />ANION <br />Sulfates <br />N <br />MG/L <br />6/29/1981 <br />11/15/2017 <br />100 <br />309 <br />290 <br />531 <br />120 <br />89.7 <br />CATION <br />Calcium <br />D <br />MG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />117 <br />117 <br />167 <br />81.3 <br />18.7 <br />CATION <br />Magnesium <br />D <br />MG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />75.2 <br />76 <br />104 <br />39.51 <br />11.9 <br />CATION <br />Sodium <br />D <br />MG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />193 <br />190 <br />288 <br />106 <br />37 <br />NUTRIENT <br />Nitrate Nitrogen <br />N <br />MG/L <br />3/26/1984 <br />11/15/2017 <br />81 <br />0.14 <br />0.08 <br />0.71 <br />0.02 <br />0.15 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />6/29/1981 <br />11/15/2017 <br />90 <br />0.243 <br />0.11 <br />1.99 <br />0.01 <br />0.296 <br />PRIMARY <br />Arsenic <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />2 <br />1 <br />40 <br />0.2 <br />6 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />4 <br />5 <br />10 <br />0.1 <br />2 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />30 <br />20 <br />100 <br />0.1 <br />20 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />0.5 <br />0.2 <br />10 <br />0.1 <br />1 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />1 <br />1 <br />8 <br />0.3 <br />1 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />3/26/1984 <br />11/15/2017 <br />89 <br />198 <br />40 <br />2160 <br />5 <br />426 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />116 <br />120 <br />273 <br />51 <br />58.7 <br />SECONDARY <br />Zinc <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />93 <br />21 <br />10 <br />190 <br />5 <br />28 <br />TRACE <br />I Boron <br />D <br />UG/L <br />3/30/1983 <br />11/15/2017 <br />92 <br />110 <br />100 <br />280 <br />10 <br />44 <br />TRACE <br />IMolybdenum <br />D <br />UG/L <br />3/30/1983111/15/20171 <br />93 <br />60 <br />50 <br />200 <br />10 <br />50 <br />3/5/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\EMPIRE\AHR 2017 ALL FINALAV3 <br />