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TABLE: 38A <br />TWENTYMILE COAL COMPANY <br />2016 ANNUAL HYDROLOGY REPORT <br />HYDROLGY MONITORING DATA <br />PERIOD OF R CORD <br />Site: 302 (309, Surface Samples) DATUM = 6705.97 <br />Location Code <br />302 <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 />50 <br />275 <br />282 <br />428 <br />96 <br />Alkalinity,Bicarbonate as CaCO3 <br />MG/L <br />1 <br />318 <br />318 <br />318 <br />318 <br />Ammonia Nitrogen <br />MG/L <br />52 <br />0.105 <br />0.05 <br />0.5 <br />0.003 <br />Cadmium Tot. Rec. <br />UG/L <br />62 <br />1.22 <br />0.5 <br />5 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />62 <br />6.86 <br />76 <br />219 <br />24 <br />Carbonate as CO3 <br />MG/L <br />58 <br />S.352 <br />7.5 <br />24.5 <br />0 <br />Hydroxide as OH <br />MG/L <br />31 <br />8 <br />2 <br />20 <br />2 <br />Iron Tot. Rec. <br />UG/L <br />73..010 <br />360 <br />11900 <br />60 <br />Magnesium Dissolved <br />MG/L <br />62 <br />50.52 <br />50.4 <br />141 <br />10 <br />Manganese Tot. Rec. <br />UG/L <br />62 <br />93.6 <br />50 <br />1500 <br />15 <br />Mercury Total <br />UG/L <br />10 <br />0.92 <br />1 <br />1 <br />0.2 <br />Molybdenum(Tot. Rec. <br />UG/L <br />62 <br />40 <br />50 <br />100 <br />10 <br />NO3-NO2 Nitrogen <br />MG/L <br />62 <br />0.068 <br />0.03 <br />0.65 <br />0.02 <br />H Temperature <br />DEG -C <br />12 <br />21.34 <br />21 <br />23 <br />19.6 <br />H Lab <br />S.U. <br />35 <br />8.42 <br />8.4 <br />8.7 <br />8 <br />Phosphorus, Ortho hos horus <br />MG/L <br />61 <br />0.0166 <br />0.01 <br />0.093 <br />0.005 <br />Selenium Tot. Rec. <br />UG/L <br />62 <br />1.2 <br />1 <br />4 <br />0.3 <br />Silver Tot. Rec. <br />UG/L <br />62 <br />0.96 <br />0.5 <br />5 <br />0.1 <br />Sodium Dissolved <br />MG/L <br />62 <br />72.58 <br />34 <br />728 <br />6 <br />Sodium Adsorption Ratio <br />RATIO <br />63 <br />1.49454 <br />0.78 <br />12.1154 <br />0.2569 <br />Solids Settleable <br />ML/L <br />1 <br />0.2 <br />0.2 <br />0.2 <br />0.2 <br />Solids Total Suspended <br />MG/L <br />62 <br />35.2 <br />13.5 <br />378 <br />2 <br />Specific Conductivity, Lab <br />UMS/CM <br />63 <br />963.5 <br />830 <br />4010 <br />246 <br />Sulfates <br />MG/L <br />62 <br />279.5 <br />192 <br />1852 <br />40 <br />Total Dissolved Solids Lab <br />MG/L <br />62 <br />1 751.7 <br />5631 <br />5960 <br />156 <br />Zinc Tot. Rec. <br />UG/L <br />62 <br />1 27 <br />12 I <br />210 <br />5 <br />2016 AHR FC POR <br />