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TABLE: 37A <br />TWENTYMILE COAL COMPANY <br />2016 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />PERIOD OF RECORD <br />Site: 16A (16A, Upper Fish Creek) DATUM = 6803.49 <br />2016 AHR FC POR <br />Location Code <br />I <br />16A <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 />37 <br />219 <br />218 <br />310 <br />135 <br />Alkalinity,Bicarbonate as CaCO3 <br />MG/L <br />10 <br />263 <br />255 <br />343 <br />190 <br />Ammonia Nitrogen <br />MG/L <br />53 <br />0.27 <br />0.2 <br />0.5 <br />0.001 <br />Arsenic Total <br />UG/L <br />1 <br />10 <br />10 <br />10 <br />10 <br />Cadmium Tot. Rec. <br />UG/L <br />53 <br />1 <br />0.5 <br />5 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />52 <br />59.91 <br />59.05 <br />200 <br />27.4 <br />Carbonate as CO3 <br />MG/L <br />46 <br />13.12 <br />13 <br />35 <br />1 <br />Chloride <br />MG/L <br />1 <br />3 <br />3 <br />3 <br />3 <br />Copper Pot - Diss <br />UG/L <br />1 <br />5 <br />5 <br />5 <br />5 <br />Fecal Coliform <br />COUNT/100ML <br />1 <br />20 <br />20 <br />20 <br />20 <br />Hydroxide as OH <br />MG/L <br />36 <br />20 <br />20 <br />20 <br />20 <br />Iron Dissolved <br />UG/L <br />1 <br />20 <br />20 <br />20 <br />20 <br />Iron Tot. Rec. <br />UG/L <br />54 <br />2450 <br />1270 <br />11000 <br />55 <br />Iron Total <br />UG/L <br />22 <br />4130 <br />595 <br />45000 <br />90 <br />Lead Pot - Diss <br />UG/L <br />1 <br />5 <br />5 <br />5 <br />5 <br />Magnesium Dissolved <br />MG/L <br />52 <br />35.56 <br />35.05 <br />59 <br />12.3 <br />Manganese Dissolved <br />UG/L <br />1 <br />5 <br />5 <br />5 <br />5 <br />Manganese Tot. Rec. <br />UG/L <br />53 <br />80.7 <br />55 <br />440 <br />9 <br />Mercury Total <br />UG/L <br />37 <br />0.98 <br />1 <br />1 <br />0.2 <br />Molybdenum Tot. Rec. <br />UG/L <br />52 <br />70 <br />50 <br />300 <br />10 <br />Nickel Pot - Diss <br />UG/L <br />1 <br />10 <br />10 <br />10 <br />10 <br />NO3-NO2 Nitrogen <br />MG/L <br />53 <br />0.11 <br />0.1 <br />0.44 <br />0.02 <br />H Temperature <br />DEG -C <br />71 <br />20.89 <br />21 <br />24 <br />12.6 <br />H, Lab <br />S.U. <br />81 <br />8.43 <br />8.5 <br />8.8 <br />7.62 <br />Phosphorus, Ortho hos horus <br />MG/L <br />49 <br />0.034 <br />0.03 <br />0.12 <br />0.01 <br />Selenium Tot. Rec. <br />UG/L <br />53 <br />1.16 <br />0.7 <br />4 <br />0.3 <br />Silver Pot - Diss <br />UG/L <br />1 <br />0.2 <br />0.2 <br />0.2 <br />0.2 <br />Silver Tot. Rec. <br />UG/L <br />53 <br />0.49 <br />0.3 <br />5 <br />0.0001 <br />Sodium Dissolved <br />MG/L <br />52 <br />26.23 <br />23.5 <br />85 <br />9 <br />Sodium Adsorption Ratiol <br />RATIO <br />52 <br />0.6709 <br />0.595 <br />2.8 <br />0.31 <br />Solids, Settleable <br />ML/L <br />24 <br />0.383 <br />0.5 <br />1.1 <br />0.1 <br />Solids Total Suspended <br />MG/L <br />75 <br />83.5 <br />21 <br />678 <br />5 <br />Specific Conductivity, Lab <br />UMS/CM <br />73 <br />618 <br />620 <br />1900 <br />205 <br />Sulfates <br />MG/L <br />64 <br />123 <br />120 <br />290 <br />26 <br />Total Dissolved Solids Lab <br />MG/L <br />55 <br />453 <br />400 <br />3500 <br />150 <br />Zinc Pot - Diss <br />UG/L <br />1 <br />5 <br />5 <br />5 <br />5 <br />Zinc Tot. Rec. <br />UG/L <br />53 <br />29 <br />30 <br />56 <br />5 <br />2016 AHR FC POR <br />