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Table: 2a <br />Twenty=nile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 09794 (009-79-4, Bedrock Well, Wadqe Overburden) Datum: 7004.54 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables09794 <br />Type <br />Parameter <br />Fractio <br />n <br />Units <br />Start Date <br />End Date <br />Count <br />Average <br />Median Maximum Minimum <br />Standard Deviation <br />FIELD <br />pH, Field <br />N <br />S.U. <br />10/2/2016 <br />9/11/2017 <br />3 <br />7.97 <br />7.58 <br />8.78 <br />7.56 <br />0.699 <br />Specific Conductivity, Field <br />N <br />UMHOS/CM <br />10/2/2016 <br />9/11/2017 <br />3 <br />1000 <br />990 <br />1030 <br />980 <br />26.5 <br />Temperature, Field <br />N <br />DEG -C <br />10/2/2016 <br />9/11/2017 <br />31 <br />9.8 <br />9.3 <br />10.91 <br />9.2 <br />0.954 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />5/17/2006 <br />4/12/2017 <br />11 <br />8.3 <br />8.3 <br />8.6 <br />7.8 <br />0.21 <br />Specific Conductivity, Lab <br />N <br />UMHOS/CM <br />5/17/2006 <br />4/12/2017 <br />11 <br />939 <br />930 <br />1010 <br />848 <br />50.2 <br />Total Dissolved Solids, Lab <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />588 <br />590 <br />630 <br />540 <br />27 <br />CATION <br />Calcium <br />D <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />12.6 <br />11.4 <br />24.7 <br />9.4 <br />4.51 <br />Magnesium <br />D <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />7.15 <br />6 <br />13.7 <br />5.2 <br />2.51 <br />Sodium <br />D <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />195 <br />194 <br />212 <br />176 <br />10.9 <br />ANION <br />Alkalinity, Bicarbonate as CaCO3 <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />425 <br />427 <br />478 <br />391 <br />27 <br />Alkalinity,Carbonate as CaCO3 <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />15.2 <br />12 <br />36.5 <br />4.5 <br />9.29 <br />Sulfates <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />it <br />140 <br />130 <br />150 <br />120 <br />11 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />0.5 <br />0.5 <br />0.5 <br />0.2 <br />0.09 <br />Lead <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />it <br />200 <br />200 <br />200 <br />200 <br />0 <br />Mercury <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />1 <br />11 <br />1 <br />1 <br />0 <br />Selenium <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />it <br />0.3 <br />0.3 <br />0.5 <br />0.1 <br />0.1 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />82 <br />50 <br />350 <br />20 <br />94 <br />Man anese <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />20 <br />30 <br />30 <br />6 <br />it <br />TRACE <br />Mol bdenum <br />D <br />UG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />70 <br />50 <br />100 <br />50 <br />30 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />11 <br />0.17 <br />0.1 <br />0.62 <br />0.03 <br />0.18 <br />Phosphorus, Orthophosphorus <br />N <br />MG/L <br />5/17/2006 <br />4/12/2017 <br />10 <br />0.037 <br />0.02 <br />0.16 <br />0.01 <br />0.046 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables09794 <br />