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Table: 12 <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 95M001 Bedrock Well, Trout Creek Sandstone Datum: 7184.68 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables95M001 (2) <br />Date <br />Depth to Water (FT) <br />4/6/2017 <br />1013.86 <br />Type <br />Parameter <br />Fraction <br />Units <br />Result <br />Detection <br />FIELD <br />pH, Field <br />N <br />S.U. <br />10.29 <br />Y <br />FIELD <br />Specific Conductivity,Field <br />N <br />UMHOS/CM <br />1070 <br />Y <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />15.1 <br />Y <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />10 <br />Y <br />PHYSICAL <br />Specific Conductivity,Lab <br />N <br />UMHOS/CM <br />1010 <br />Y <br />PHYSICAL <br />Total Dissolved Solids Lab <br />N <br />MG/L <br />720 <br />Y <br />CATION <br />Calcium <br />D <br />MG/L <br />1.6 <br />Y <br />CATION <br />Magnesium <br />D <br />MG/L <br />0.6 <br />Y <br />CATION <br />Sodium <br />D <br />MG/L <br />208 <br />Y <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />149 <br />Y <br />ANION <br />Alkalinity, Carbonate as CaCO3 <br />N <br />MG/L <br />226 <br />Y <br />ANION <br />Sulfates <br />N <br />MG/L <br />20 <br />Y <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />0.5 <br />N <br />PRIMARY <br />Lead <br />D <br />UG/L <br />200 <br />N <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />1 <br />N <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />0.2 <br />Y <br />SECONDARY <br />Iron <br />D <br />UG/L <br />110 <br />Y <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />30 <br />N <br />TRACE <br />Molybdenum <br />D <br />UG/L <br />140 <br />Y <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />0.03 <br />Y <br />NUTRIENT <br />Phosphorus, Orthophosphorus <br />N <br />MG/L <br />11.6 <br />Y <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables95M001 (2) <br />