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TABLE: 40A <br />TWENTYMILE COAL COMPANY <br />2016 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />PERIOD OF RECORD <br />Site: 1003 (1003, Surface Samples) DATUM = 652.0 <br />Location Code <br />1003 <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 />103 <br />233 <br />240 <br />360 <br />102 <br />Alkalinity,Bicarbonate as CaCO3 <br />MG/L <br />10 <br />259 <br />289 <br />360 <br />79 <br />Ammonia Nitrogen <br />MG/L <br />107 <br />0.226 <br />0.05 <br />5 <br />0.001 <br />Arsenic Total <br />UG/L <br />50 <br />2 <br />2 <br />6 <br />1 <br />BOD <br />MG/L <br />66 <br />2 <br />2 <br />6 <br />2 <br />Cadmium Tot, Rec. <br />UG/L <br />114 <br />0.873 <br />0.5 <br />5 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />227 <br />74.71 <br />76 <br />161 <br />20 <br />Carbonate as CO3 <br />MG/L <br />109 <br />12.02 <br />11 <br />38 <br />0 <br />Chloride <br />MG/L <br />81 <br />7.1 <br />6 <br />19 <br />1 <br />Hydroxide as OH <br />MG/L <br />63 <br />10 <br />20 <br />20 <br />2 <br />Iron Tot. Rec. <br />UG/L <br />114 <br />2590 <br />815 <br />28700 <br />100 <br />Iron Total <br />UG/L <br />116 <br />8480 <br />4680 <br />65500 <br />340 <br />Magnesium Dissolved <br />MG/L <br />227 <br />50.71 <br />51 <br />147 <br />11 <br />Manganese Dissolved <br />UG/L <br />14 <br />31 <br />20 <br />110 <br />10 <br />Manganese Tot. Rec. <br />UG/L <br />127 <br />117 <br />90 <br />510 <br />5 <br />Mercury Total <br />UG/L <br />93 <br />0.65 <br />0.5 <br />4 <br />0.1 <br />Molybdenum Tot. Rec. <br />UG/L <br />114 <br />50 <br />50 <br />100 <br />10 <br />NO3-NO2 Nitrogen <br />MG/L <br />225 <br />0.563 <br />0.2 <br />3.21 <br />0.005 <br />H Temperature <br />DEG -C <br />69 <br />21.34 <br />21 <br />26 <br />18.6 <br />H Lab <br />S.U. <br />102 <br />8.37 <br />8.4 <br />8.9 <br />7.43 <br />Phosphorus Total <br />MG/L <br />66 <br />0.158 <br />0.07 <br />1.08 <br />0.02 <br />Phosphorus, Ortho hos horus <br />MG/L <br />158 <br />0.02691 <br />0.02 <br />0.26 <br />0.005 <br />Selenium Tot. Rec. <br />UG/L <br />114 <br />1.46 <br />1 <br />17 <br />0.005 <br />Silver Tot. Rec. <br />UG/L <br />114 <br />0.61 <br />0.4 <br />5 <br />0.05 <br />Sodium Dissolved <br />MG/L <br />227 <br />58.5 <br />47 <br />286 <br />9 <br />Sodium Adsorption Ratio <br />RATIO <br />231 <br />1.2879 <br />1.01 <br />7.14 <br />0.29 <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 />293 <br />187.1 <br />1 40 <br />2190 <br />2 <br />Specific Conductivity,Lab <br />UMS/CM <br />190 <br />930.3 <br />896.5 <br />2810 <br />293 <br />Sulfates <br />MG/L <br />311 <br />297.7 <br />265 <br />2045 <br />37 <br />Total Dissolved Solids Lab <br />MG/L <br />229 <br />659.9 <br />630 <br />2190 <br />200 <br />Zinc Tot. Rec. <br />UG/L <br />114 <br />28 <br />20 <br />100 <br />5 <br />2016 AHR FC POR <br />