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TABLE: 33A <br />TWENTYMILE COAL COMPANY <br />2016 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />PERIOD OF RECORD <br />Site: 800 (800 USGS 09243800, Surface Sample) DATUM = 6940 <br />2016 AHR FC POR <br />Location Code <br />1 800 <br />Chemical Name <br />Units <br />Sample Count <br />Mean <br />Median <br />Maximum Minimum <br />Alkalinity as CaCO3 @ pH 4.5 <br />MG/L <br />132 <br />275 <br />266 <br />462 <br />117 <br />Alkalinity,Bicarbonate as CaCO3 <br />MG/L <br />10 <br />375 <br />331 <br />564 <br />220 <br />Ammonia Nitrogen <br />MG/L <br />111 <br />0.151 <br />0.05 <br />0.5 <br />0.001 <br />Arsenic Total <br />UG/L <br />13 <br />2 <br />2 <br />5 <br />1 <br />Cadmium Dissolved <br />UG/L <br />8 <br />1.5 <br />1 <br />3 <br />0.1 <br />Cadmium Tot. Rec <br />UG/L <br />115 <br />1 <br />1 <br />5 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />150 <br />267.5 <br />289 <br />730 <br />25 <br />Carbonate as CO3 <br />MG/L <br />74 <br />9.118 <br />2 <br />31 <br />0 <br />Chloride <br />MG/L <br />54 <br />12.6 <br />9.45 <br />56 <br />1.1 <br />Hydroxide as OH <br />MG/L <br />5 <br />10 <br />20 <br />20 <br />2 <br />Iron Dissolved <br />UG/L <br />47 <br />48 <br />30 <br />460 <br />9 <br />Iron Tot. Rec <br />UG/L <br />15 <br />1360 <br />440 <br />33000 <br />30 <br />Lead Dissolved <br />UG/L <br />12 <br />5.7 <br />2 <br />40 <br />1 <br />Magnesium Dissolved <br />MG/L <br />151 <br />197.1 <br />185 <br />408 <br />10 <br />Manganese Dissolved <br />UG/L <br />31 <br />300 <br />250 <br />1500 <br />10 <br />Manganese Tot. Rec <br />UG/L <br />137 <br />327 <br />190 <br />4080 <br />10 <br />Mercury Dissolved <br />UG/L <br />8 <br />1 <br />0.1 <br />0.1 <br />0.1 <br />Mercury Total <br />UG/L <br />33 <br />1 <br />1 <br />1 <br />1 <br />Molybdenum Dissolved <br />UG/L <br />8 <br />10 <br />2 <br />50 <br />1 <br />Molybdenum Tot. Rec <br />UG/L <br />114 <br />52 <br />50 <br />300 <br />1 <br />NO3-NO2 Nitrogen <br />MG/L <br />146 <br />1.47 <br />0.1 <br />66 <br />0.01 <br />H Temperature <br />DEG -C <br />44 <br />21.12 <br />21 <br />25 <br />18 <br />H, Lab <br />S. U. <br />73 <br />8.12 <br />8.2 <br />8.7 <br />7.68 <br />Phosphorus, Ortho hos horus <br />MG/L <br />140 <br />0.02274 0.01 <br />0.21 <br />0.005 <br />Selenium Dissolved <br />UG/L <br />8 <br />1 <br />1 <br />2 <br />1 <br />Selenium Tot. Rec <br />UG/L <br />94 <br />1.7 <br />1 <br />20 <br />0.1 <br />Silver Tot. Rec <br />UG/L <br />102 <br />0.75 <br />0.5 <br />5 <br />0.0001 <br />Sodium Dissolved <br />MG/L <br />150 <br />51.24 <br />47.75 <br />160 <br />6.1 <br />Sodium Adsorption Ratio <br />RATIO <br />154 <br />21.403 0.58265 <br />3200 <br />0.057 <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 />150 <br />96.8 <br />20 <br />2400 <br />2 <br />Specific Conductivity, Lab <br />UMS/CM <br />136 <br />2416 <br />2650 <br />4400 <br />660 <br />Sulfates <br />MG/L <br />150 <br />1291 <br />1385 <br />2510 <br />66 <br />Total Dissolved Solids, Lab <br />MG/L <br />103 <br />2622 <br />2966 <br />3770 <br />8 <br />Zinc Tot. Rec <br />UG/L <br />117 <br />37 <br />20 <br />240 <br />5 <br />2016 AHR FC POR <br />