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Table: Ta <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 06BR7 (006-BRDH7 Bedrock Well, Twentymile Sandstone) Datum: 6826.5 <br />Type <br />Parameter <br />Fraction <br />Units <br />Period of Record <br />Sample Count Average <br />Median Maximum <br />Minimum <br />STDE <br />FIELD <br />pH, Field <br />N <br />S.U. <br />1/15/1987 9/11/2017 <br />32 <br />8.88 <br />8.98 <br />9.7 <br />7.61 <br />0.482 <br />FIELD <br />Specific Conductivity, Field <br />N <br />UMHOS/CM <br />1/15/1987 9/11/2017 <br />32 <br />779.5 <br />790 <br />1021 <br />480 <br />129 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />1/15/1987 9/11/2017 <br />32 <br />12.1 <br />11.3 <br />19 <br />4 <br />3.6 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />4/30/1998.4/30/1998 <br />1 <br />8.6 <br />8.6 <br />8.6 <br />8.6 <br />0 <br />PHYSICAL <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />12/2/1987 4/30/1998 <br />5 <br />799 <br />807 <br />855 <br />722 <br />51 <br />PHYSICAL <br />Total Dissolved Solids Lab <br />N <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />490 <br />480 <br />540 <br />440 <br />38 <br />CATION <br />Calcium <br />D <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />2.4 <br />2 <br />3.7 <br />1.4 <br />0.94 <br />CATION <br />Magnesium <br />D <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />1 <br />1 <br />21 <br />0.4 <br />0.6 <br />CATION <br />Sodium <br />D <br />MG/L <br />12/2/1987,4/30/1998 <br />5 <br />201 <br />200 <br />214 <br />186 <br />12.4 <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />391.2 <br />373 <br />430.8 <br />367.2 <br />29.93 <br />ANION <br />Alkalinitv., Carbonate as CaCO3 <br />N <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />24.3 <br />24.6 <br />32 <br />17 <br />6.34 <br />ANION <br />Sulfates <br />N <br />MG/L <br />12/2/1987 4/30/1998 <br />5 <br />76 <br />70 <br />100 <br />50 <br />23 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />0.4 <br />0.5 <br />0.5 <br />0.1 <br />0.2 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />60 <br />20 <br />200 <br />20 <br />80 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />0.2 <br />0.2 <br />0.2 <br />0.2 <br />0 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />1 <br />1 <br />1 <br />1 <br />0 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />60 <br />501 <br />100 <br />30 <br />30 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />18 <br />101 <br />50 <br />5 <br />19 <br />TRACE <br />Molybdenum <br />D <br />UG/L <br />12/2/1987 4/30/1998 <br />5 <br />40 <br />10 <br />100 <br />10 <br />40 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />12/2/198714/30/1998 <br />5 <br />0.04 <br />0.02 <br />0.1 <br />0.02 <br />0.03 <br />NUTRIENT <br />113hosphorus, Ortho hos horus <br />IN <br />MG/L 112/2/198714/30/1998, <br />5 <br />0.049 <br />0.04 <br />0.078 <br />O.OT41 <br />0.024 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables06BR7 <br />