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Table: 14a <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 97013TC Bedrock Well, Trout Creek Sandstone Datum: 6685.35 <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 />10/15/1998 4/14/2017 <br />16 <br />9.24 <br />9.22 <br />10.4 <br />8.79 <br />0.377 <br />FIELD <br />Specific Conductivity,Field <br />N <br />UMHOS/CM <br />10/15/1998 4/14/2017 <br />16 <br />1290 <br />1300 <br />1340 <br />1190 <br />42.1 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />10/15/1998 4/14/2017 <br />16 <br />10.2 <br />10.1 <br />12.4 <br />6.8 <br />1.5 <br />PHYSICAL <br />pH. Lab <br />N <br />S.U. <br />10/15/1998 4/14/2017 <br />19 <br />9.41 <br />9.27 <br />10.5 <br />8.87 <br />0.413 <br />PHYSICAL <br />Specific Conductivity,Lab <br />N <br />UMHOS/CM <br />10/15/199814/14/2017 <br />19 <br />1242 <br />1280 <br />1400 <br />820 <br />132.9 <br />PHYSICAL <br />Total Dissolved Solids Lab <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />753 <br />760 <br />810 <br />590 <br />53 <br />CATION <br />Calcium <br />D <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />1.3 <br />1.2 <br />2.8 <br />0.25 <br />0.61 <br />CATION <br />Ma nesium <br />D <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />0.63 <br />0.6 <br />1.6 <br />0.1 <br />0.47 <br />CATION <br />Sodium <br />D <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />276 <br />283 <br />380 <br />77 <br />58.3 <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />3821 <br />410 <br />534 <br />143 <br />93.5 <br />ANION <br />Alkalinity, Carbonate as CaCO3 <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />117 <br />57 <br />780 <br />2 <br />173 <br />ANION <br />Sulfates <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />197 <br />210 <br />2801 <br />100 <br />48.2 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />2 <br />0.5 <br />5 <br />0.5 <br />2 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />100 <br />50 <br />200 <br />40 <br />80 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />0.5 <br />0.2 <br />1 <br />0.2 <br />0.4 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />4.2 <br />21 <br />30 <br />0.1 <br />6.9 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />140 <br />90 <br />590 <br />10 <br />140 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />40 <br />23 <br />250 <br />5 <br />63 <br />TRACE <br />Molybdenum <br />D <br />UG/L <br />10/15/1998 4/14/2017 <br />19 <br />40 <br />50 <br />100 <br />10 <br />20 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />19 <br />0.043 <br />0.02 <br />0.19 <br />0.02 <br />0.046 <br />NUTRIENT <br />Phos horus Ortho hos horus <br />N <br />MG/L <br />10/15/1998 4/14/2017 <br />181 <br />0.0551 <br />0.051 <br />0.13 <br />0.01 <br />0.034 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables97013TC <br />