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Table: 12A <br />Williams Fork Mine <br />2017 Annual Hydrology Report <br />Period of Record <br />Site: 259, Well 259, Twentymile Sandstone Datum: 6128.0 <br />Type <br />Parameter <br />Fraction <br />Units <br />Date Range Sample <br />Count Average <br />Median <br />Maximum <br />Minimum <br />STDEV <br />FIELD <br />H, Field <br />N <br />S.U. <br />1/26/1982 <br />11/19/2017 <br />86 <br />7.52 <br />7.6 <br />9.21 <br />6 <br />0.666 <br />FIELD <br />Specific Conductivi , Field <br />N <br />UMHOS/CM <br />1/26/1982 <br />11/19/2017 <br />86 <br />418 <br />440 <br />1440 <br />109.2 <br />257.6 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />5/27/1982 <br />11/19/2017 <br />82 <br />10.9 <br />11 <br />18.9 <br />4 <br />3 <br />PHYSICAL <br />jAlkalinity as CaCO3, @ pH 4.5 <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />30 <br />143 <br />188 <br />2456.8 <br />91.9 <br />PHYSICAL <br />Hardness <br />N <br />MG/L <br />5/5/2011 <br />4/11/2017 <br />5 <br />65.4 <br />371 <br />195 <br />28 <br />72.6 <br />PHYSICAL <br />Hydroxide as OH <br />N <br />MG/L <br />6/11/1992 <br />4/11/2017 <br />9 <br />10 <br />20 <br />20 <br />0 <br />10 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />6/29/1981 <br />4/11/2017 <br />30 <br />7.66 <br />7.8 <br />9.2 <br />5.9 <br />0.734 <br />PHYSICAL <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />3/30/1981 <br />4/11/2017 <br />31 <br />357 <br />460 <br />570 <br />67 <br />189 <br />ANION <br />Alkalinity, Bicarbonate as CaCO3 <br />N <br />MG/L <br />5/20/2009 <br />4/11/2017 <br />5 <br />58.9 <br />13 <br />220 <br />8.2 <br />91.1 <br />ANION <br />Chloride <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />31 <br />6.87 <br />4 <br />30.6 <br />1 <br />7.45 <br />ANION <br />Sulfates <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />31 <br />37 <br />47 <br />95 <br />1 <br />29 <br />CATION <br />Calcium <br />D <br />MG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />25.4 <br />16 <br />76 <br />2.4 <br />22.1 <br />CATION <br />Magnesium <br />D <br />MG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />12.2 <br />9 <br />24.2 <br />1.1 <br />9.15 <br />CATION <br />Sodium <br />D <br />MG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />22.3 <br />19.9 <br />39.3 <br />4.7 <br />11.5 <br />NUTRIENT <br />Nitrate Nitrogen <br />N <br />MG/L <br />3/5/1985 <br />4/11/2017 <br />20 <br />0.03 <br />0.02 <br />0.09 <br />0.01 <br />0.02 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />31 <br />0.057 <br />0.02 <br />0.26 <br />0.02 <br />0.053 <br />PRIMARY <br />Arsenic <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />4 <br />1 <br />40 <br />1 <br />8 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />4 <br />5 <br />10 <br />0.5 <br />2 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />35 <br />20 <br />380 <br />0.1 <br />77 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />0.4 <br />0.2 <br />1 <br />0.1 <br />0.4 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />1 <br />1 <br />6 <br />0.3 <br />1 <br />SECONDARY Iron <br />D <br />UG/L <br />3/5/1985 <br />4/11/2017 <br />22 <br />1070 <br />65 <br />7400 <br />10 <br />2180 <br />SECONDARY Manganese <br />D <br />UG/L <br />6/29/1983 1 <br />4/11/2017 <br />23 <br />115 <br />60 <br />330 <br />7 <br />98.3 <br />SECONDARY Zinc <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />56.9 <br />10 <br />540 <br />5 <br />112 <br />TRACE <br />Boron <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />63 <br />50 <br />2401 <br />10 <br />49 <br />TRACE <br />Mol bdenum <br />D <br />UG/L <br />6/29/1983 <br />4/11/2017 <br />23 <br />60 <br />50 <br />200 <br />10 <br />50 <br />3/5/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\EMPIRE\AHR 2017 ALL FINAL259 <br />