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Table: Sa <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 087758 (008-77-58 Bedrock Well, Wadge Overburden) Datum: 6719.8 <br />Type <br />Parameter <br />Fraction <br />Units <br />Peroid of Record <br />Sample Count Average <br />Median Maximum <br />Minimum <br />STDE <br />FIELD <br />H, Field <br />N <br />S.U. <br />10/1/2016 9/11/2017 <br />3 <br />7.58 <br />7.51 <br />7.74 <br />7.49 <br />0.139 <br />FIELD <br />Specific Conductivity,Field <br />N <br />UMHOS/CM <br />10/1/2016 9/11/2017 <br />3 <br />1640 <br />1620 <br />1700 <br />1610 <br />49.3 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />10/1/2016 9/11/2017 <br />3 <br />11.2 <br />11.3 <br />11.5 <br />10.9 <br />0.306 <br />PHYSICAL <br />pH, Lab <br />N <br />S.U. <br />5/17/2006 <br />4/6/2017 <br />10 <br />8.2 <br />8.2 <br />8.5 <br />8 <br />0.16 <br />PHYSICAL <br />Specific Conductivity,Lab <br />N <br />UMHOS/CM <br />5/17/2006 <br />4/6/2017 <br />10 <br />1660 <br />1690 <br />1770 <br />1480 <br />104 <br />PHYSICAL <br />Total Dissolved Solids Lab <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />1170 <br />1220 <br />1280 <br />1030 <br />98.7 <br />CATION <br />Calcium <br />D <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />95.5 <br />103 <br />131 <br />51.2 <br />29.9 <br />CATION <br />Magnesium <br />D <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />65.9 <br />70.7 <br />91.8 <br />35.6 <br />20.7 <br />CATION <br />Sodium <br />D <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />200 <br />181 <br />278 <br />155 <br />38.3 <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />511 <br />515 <br />559 <br />428 <br />34.6 <br />ANION <br />Alkalinity, Carbonate as CaCO3 <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />13.6 <br />18.9 <br />20 <br />4 <br />7.81 <br />ANION <br />Sulfates <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />510 <br />560 <br />600 <br />380 <br />89 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />0.5 <br />0.5 <br />0.5 <br />0.5 <br />0 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />200 <br />200 <br />200 <br />200 <br />0 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />1 <br />1 <br />1 <br />1 <br />0 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />5/17/2006 1 <br />4/6/2017 <br />10 <br />0.4 <br />0.3 <br />0.5 <br />0.3 <br />0.1 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />82 <br />55 <br />190 <br />30 <br />50 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />16 <br />16 <br />30 <br />10 <br />6.4 <br />TRACE <br />Molybdenum <br />D <br />UG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />70 <br />50 <br />100 <br />10 <br />30 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />10 <br />0.078 <br />0.1 <br />0.15 <br />0.02 <br />0.043 <br />NUTRIENT <br />Phosphorus, Ortho hos horus <br />N <br />MG/L <br />5/17/2006 <br />4/6/2017 <br />9 <br />0.04 <br />0.05 <br />0.05 <br />0.02 <br />0.02 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables087758 <br />