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Table: 6 <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Water Year Monitoring Data <br />Site: 93M001 Bedrock Well, Wadge Overburden Datum: 7013.5 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables931V1001 (2) <br />Date <br />Depth to Water (FT) <br />10/1/2016 <br />571.19 <br />4/6/2017 <br />518.17 <br />9/11/2017 <br />524.37 <br />Type <br />Parameter <br />Fraction <br />Units <br />Result Detection <br />Result Detection <br />Result Detection <br />FIELD <br />pH, Field <br />N <br />S.U. <br />9.47 Y <br />9.45 <br />Y <br />9.39 Y <br />FIELD <br />Specific Conductivity, Field <br />N <br />UMHOS/CM <br />1980 Y <br />1970 <br />Y <br />1970 Y <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />11.9 Y <br />12.4 <br />Y <br />11.8 Y <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />9.7 <br />Y <br />PHYSICAL <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />1870 <br />Y <br />PHYSICAL <br />Total Dissolved Solids, Lab <br />N <br />MG/L <br />1110 <br />Y <br />CATION <br />Calcium <br />D <br />MG/L <br />1.5 <br />Y <br />CATION <br />Magnesium <br />D <br />MG/L <br />1.5 <br />Y <br />CATION <br />Sodium <br />D <br />MG/L <br />438 <br />Y <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />726 <br />Y <br />ANION <br />Alkalinity,Carbonate as CaCO3 <br />N <br />MG/L <br />215 <br />Y <br />ANION <br />Sulfates <br />N <br />MG/L <br />10 <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 />0.3 <br />N <br />SECONDARY <br />Iron <br />D <br />UG/L <br />40 <br />Y <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />30 <br />N <br />TRACE <br />Molybdenum <br />ID <br />UG/L <br />100 <br />N <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />IN <br />MG/L <br />0.1 <br />N <br />NUTRIENT <br />I Phosphorus, Orthophosphorus <br />IN <br />I MG/L <br />0.03 <br />Y <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables931V1001 (2) <br />