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Table: 22a <br />Twentymile Coal, LLC <br />2017 Annual Hydrology Report <br />Period of Record Summary of Water Quality <br />Site: 08AV1 (008 -AV -1, Alluvial Well, Foidel Creek Alluvium) Datum: 6676.84 <br />Type <br />Parameter <br />Fraction <br />Units <br />Period of Record <br />Sample Count Average <br />Median Maximum Minimum STDEV <br />FIELD <br />H, Field <br />N <br />S.U. <br />8/13/1984 9/10/2017 <br />170 <br />7.48 <br />7.5 <br />8.5 <br />6.7 <br />0.289 <br />FIELD <br />Specific Conductivity,Field <br />N <br />UMHOS/CM <br />8/13/1984 9/10/2017 <br />170 <br />1673 <br />1712 <br />2420 <br />500 <br />342.6 <br />FIELD <br />Temperature, Field <br />N <br />DEG -C <br />8/13/1984 9/10/2017 <br />170 <br />9.52 <br />9.2 <br />20 <br />2 <br />3.64 <br />PHYSICAL <br />Specific Conductivity,Lab <br />N <br />UMHOS/CM <br />11/28/1990 3/31/1995 <br />5 <br />1770 <br />1770 <br />2190 <br />1040 <br />452 <br />PHYSICAL <br />Total Dissolved Solids, Lab <br />N <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />1270 <br />1280 <br />1788 <br />632 <br />412.2 <br />CATION <br />Calcium <br />D <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />221 <br />217 <br />255 <br />182 <br />24.5 <br />CATION <br />Magnesium <br />D <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />83.5 <br />87.6 <br />103 <br />57 <br />16.1 <br />CATION <br />Sodium <br />D <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />101 <br />116 <br />127 <br />68 <br />22.6 <br />ANION <br />Alkalinity,Bicarbonate as CaCO3 <br />N <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />477.4 <br />483 <br />866 <br />167 <br />249.8 <br />ANION <br />Alkalini Carbonate as CaCO3 <br />N <br />MG/L <br />3/19/1986 3/31/1995 <br />5 <br />2 <br />2 <br />8 <br />0 <br />3 <br />ANION <br />Sulfates <br />N <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />616 <br />760 <br />889 <br />280 <br />253 <br />PRIMARY <br />Cadmium <br />D <br />UG/L <br />4/13/1986 3/31/1995 <br />7 <br />4 <br />0.5 <br />20 <br />0.1 <br />7 <br />PRIMARY <br />Lead <br />D <br />UG/L <br />11/28/1990 3/31/1995 <br />4 <br />20 <br />20 <br />30 <br />20 <br />5 <br />PRIMARY <br />Mercury <br />D <br />UG/L <br />4/13/1986 3/31/1995 <br />7 <br />0.2 <br />0.2 <br />0.4 <br />0.2 <br />0.08 <br />PRIMARY <br />Selenium <br />D <br />UG/L <br />4/13/1986 3/31/1995 <br />7 <br />3.6 <br />2 <br />14 <br />1 <br />4.7 <br />SECONDARY <br />Iron <br />D <br />UG/L <br />3/19/1986 3/31/1995 <br />8 <br />200 <br />140 <br />580 <br />50 <br />180 <br />SECONDARY <br />Manganese <br />D <br />UG/L <br />3/19/1986 3/31/19951 <br />8 <br />1290 <br />462 <br />4500 <br />10 <br />1650 <br />TRACE <br />Molybdenum <br />D <br />UG/L <br />11/28/1990 3/31/1995 <br />4 <br />20 <br />10 <br />50 <br />10 <br />20 <br />NUTRIENT <br />Ammonia Nitrogen <br />N <br />MG/L <br />4/13/1986 3/31/1995 <br />6 <br />0.0455 <br />0.0325 <br />0.104 <br />0.001 <br />0.048 <br />NUTRIENT <br />NO3-NO2 Nitrogen <br />IN <br />MG/L <br />3/19/1986 3/31/1995 <br />9 <br />0.967 <br />0.25 <br />5.85 <br />0.02 <br />1.86 <br />NUTRIENT <br />I Phosphorus, Ortho hos horus <br />IN <br />MG/L 1 <br />4/13/198613/31/1995 <br />8 <br />0.416 <br />0.282 <br />1.76 <br />0.038 <br />0.566 <br />2/27/2018 I:\Environmental\CDMG - CDRMS\AHR\2017\AHR ALL FINAL Tables08AV1 <br />