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TABLE: 31A <br />TWENTYMILE COAL, LLC <br />2016 ANNUAL HYDROLOGY REPO T <br />WATER QUALITY MONITORING DA <br />PERIOD OF RECORD <br />Site: AVF15 (AVF-15, Alluvial Well) DATUM = 6628.4 <br />Location Code <br />IAVF15 <br />Chemical Name <br />Units <br />Sample Count <br />Mean <br />Median Maximum Minimum <br />Alkalinity as CaCO3, @ pH 4.5 <br />MG/L <br />14 <br />361 <br />378 <br />407 <br />263 <br />Alkalinity, Bicarbonate as CaCO3 <br />MG/L <br />2 <br />390 <br />390 <br />450 <br />320 <br />Ammonia Nitrogen <br />MGL <br />14 <br />0.24 <br />0.2 <br />0.73 <br />0.09 <br />Cadmium Dissolved <br />UGAL <br />14 <br />0.47 <br />0.5 <br />0.5 <br />0.1 <br />Calcium Dissolved <br />MG L <br />14 <br />94.25 <br />89.7 <br />138 <br />71.5 <br />Carbonate as CO3 <br />MG L <br />14 <br />18.8 <br />20 <br />20 <br />3.4 <br />Hydroxide as OH <br />MG L <br />14 <br />20 <br />20 <br />20 <br />20 <br />Iron Dissolved <br />UG/L <br />14 <br />871 <br />155 <br />6690 <br />40 <br />Lead Dissolved <br />UG/L <br />14 <br />200 <br />200 <br />200 <br />200 <br />Magnesium Dissolved <br />MG/L <br />14 <br />41.09 <br />38.85 <br />62.5 <br />33.6 <br />Manganese Dissolved <br />UG/L <br />14 <br />592 <br />555 <br />1210 <br />299 <br />Mercury Dissolved <br />UG/L <br />14 <br />1 <br />1 <br />1 <br />1 <br />Molybdenum Dissolved <br />UG/L <br />14 <br />100 <br />100 <br />100 <br />100 <br />NO3-NO2 Nitrogen <br />MG/L <br />14 <br />0.087 <br />0.1 <br />0.1 <br />0.04 <br />H Temperature <br />DEG -C <br />14 <br />20.86 <br />20.3 <br />23.6 <br />19 <br />H, Lab <br />S.U. <br />14 <br />7.88 <br />7.8 <br />8.3 <br />7.6 <br />Phosphorus, Ortho hos horus <br />MG/L <br />14 <br />0.03 <br />0.02 <br />0.05 <br />0.01 <br />Selenium Dissolved <br />UG/L <br />14 <br />0.964 <br />0.3 <br />4.2 <br />0.1 <br />Sodium Dissolved <br />MG/L <br />14 <br />50.13 <br />38.25 <br />89.2 <br />32.9 <br />Specific Conductivity,Lab <br />UMS/CM <br />14 <br />950 <br />921 <br />1400 <br />765 <br />Sulfates <br />MG/L <br />14 <br />190 <br />160 <br />400 <br />110 <br />Total Dissolved Solids Lab <br />MG/L <br />14 <br />643 <br />608 <br />986 <br />480 <br />2016 AHR FC POR <br />