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Table: 6A <br />Williams Fork Mine <br />2017 Annual Hydrology Report <br />Period of Record <br />Site: T4, Well TR -4, Middle Sandstone Datum: 6308.3 <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 />11/19/2017 <br />88 <br />8.53 <br />8.6 <br />9.5 <br />6.97 <br />0.526 <br />FIELD <br />Specific Conductivity, Field <br />N <br />UMHOS/CM <br />1/26/1982 <br />11/19/2017 <br />88 <br />506.6 <br />342 <br />2410 <br />180 <br />478.38 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />5/27/1982 <br />11/19/2017 <br />84 <br />11.6 <br />11 <br />26.5 <br />4.5 <br />3.09 <br />PHYSICAL <br />Alkalinity as CaCO3, @ pH 4.5 <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />29 <br />298 <br />226 <br />630 <br />117 <br />168 <br />PHYSICAL <br />Hardness <br />N <br />MG/L <br />5/5/2011 <br />4/11/2017 <br />5 <br />32 <br />33 <br />42 <br />18 <br />9.4 <br />PHYSICAL <br />Hydroxide as OH <br />N <br />MG/L <br />6/11/1992 <br />4/11/2017 <br />9 <br />10 <br />201 <br />20 <br />0 <br />10 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />3/30/1981 <br />4/11/2017 <br />33 <br />8.52 <br />8.6 <br />10.3 <br />6.9 <br />0.65 <br />PHYSICAL <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />3/30/1981 <br />4/11/2017 <br />33 <br />745 <br />396 <br />2320 <br />180 <br />748 <br />ANION <br />Alkalinity, Bicarbonate as CaCO3 <br />N <br />MG/L <br />5/20/2009 <br />4/11/2017 <br />4 <br />606 <br />588 <br />690 <br />558 <br />62.1 <br />ANION <br />Chloride <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />33 <br />9.27 <br />3 <br />41 <br />1 <br />14.3 <br />ANION <br />Sulfates <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />33 <br />127 <br />19 <br />620 <br />2 <br />216 <br />CATION <br />Calcium <br />D <br />MG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />8 <br />4 <br />100 <br />2 <br />19 <br />CATION <br />Magnesium <br />D <br />MG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />15.1 <br />8 <br />51.3 <br />1 <br />12.3 <br />CATION <br />Sodium <br />D <br />MG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />150 <br />39.4 <br />553 <br />16.3 <br />204 <br />NUTRIENT <br />Nitrate Nitrogen <br />N <br />MG/L <br />3/5/1985 <br />4/11/2017 <br />22 <br />0.03 <br />0.03 <br />0.07 <br />0.02 <br />0.01 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />3/30/1981 <br />4/11/2017 <br />31 <br />0.05 <br />0.03 <br />0.1 <br />0.02 <br />0.03 <br />PRIMARY <br />Arsenic <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />3 <br />1 <br />40 <br />1 <br />8 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />6 <br />5 <br />50 <br />0.5 <br />10 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />20 <br />20 <br />50 <br />0.5 <br />13 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />0.4 <br />0.2 <br />1 <br />0.1 <br />0.4 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />1 <br />1 <br />2 <br />0.2 <br />0.5 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />3/5/1985 <br />4/11/2017 <br />24 <br />347 <br />85 <br />1510 <br />10 <br />485 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />7/8/1983 <br />4/11/2017 <br />25 <br />16 <br />10 <br />54 <br />5 <br />11 <br />SECONDARY <br />Zinc <br />ID <br />UG/L <br />1 7/8/1983 <br />4/11/2017 <br />25 <br />57 <br />10 <br />990 <br />5 <br />190 <br />TRACE <br />Boron <br />I D <br />I UG/L <br />1 7/8/1983 <br />4/11/2017 <br />25 <br />74 <br />401 <br />2101 <br />10 <br />73 <br />TRACE <br />Molybdenum <br />I D <br />I UG/L <br />1 7/8/1983 <br />4/11/20171 <br />25 <br />601 <br />501 <br />2001 <br />5 <br />50 <br />3/5/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\EMPIRE\AHR 2017 ALL FINALT4 <br />