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TABLE: 35A <br />TWENTYMILE COAL COMPANY <br />2016 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />PERIOD OF RECORD <br />Site: 900 (900 USGS 09243900, Surface Sample) DATUM = 6730.0 <br />j <br />Location Coe <br />900 <br />Chemical Name <br />Unitsl <br />Sample Count <br />Mean <br />Median Maximum Minimum <br />Alkalinityas CaCO3 @ H 4.5 <br />MG/L <br />123 <br />272 <br />272 <br />448 <br />74 <br />Alkalinity,Bicarbonate as CaCO3 <br />MG/L <br />8 <br />414 <br />415 <br />580 <br />314 <br />Ammonia Nitrogen <br />MG/L <br />122 <br />0.159 <br />0.075 <br />0.77 <br />0.001 <br />Cadmium Dissolved <br />UG/L <br />3 <br />0.7 <br />1 <br />1 <br />0.1 <br />Cadmium Tot. Rec. <br />UG/L <br />105 <br />0.92 <br />0.5 <br />5 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />152 <br />201.4 <br />190.5 <br />430 <br />45 <br />Carbonate as CO3 <br />MG/L <br />79 <br />10.47 <br />7 <br />35 <br />0 <br />Chloride <br />MG/L <br />51 <br />15.7 <br />14 <br />31 <br />5.4 <br />Hydroxide as OH <br />MG/L <br />60 <br />10 <br />20 <br />20 <br />2 <br />Iron Dissolved <br />UG/L <br />36 <br />120 <br />30 <br />2100 <br />10 <br />Iron Tot. Rec. <br />UG/L <br />151 <br />2620 <br />790 <br />68000 <br />20 <br />Iron Total <br />UG/L <br />1 <br />690 <br />690 <br />690 <br />690 <br />Lead Dissolved <br />UG/L <br />1 <br />60 <br />60 <br />60 <br />60 <br />Magnesium Dissolved <br />MG/L <br />153 <br />139.2 <br />140 <br />312 <br />16 <br />Man anese Dissolved <br />UG/L <br />4 <br />690 <br />350 <br />1900 <br />180 <br />Manganese Tot. Rec. <br />UG/L <br />132 <br />382 <br />290 <br />1800 <br />20 <br />Mercury Dissolved <br />UG/L <br />3 <br />0.1 <br />0.1 <br />0.1 <br />0.1 <br />Mercury Total <br />UG/L <br />40 <br />0.96 <br />1 <br />1 <br />0.2 <br />Molybdenum Dissolved <br />UG/L <br />1 <br />50 <br />50 <br />50 <br />50 <br />Molybdenum Tot. Rec. <br />UG/L <br />107 <br />50 <br />50 <br />200 <br />1 <br />NO3-NO2 Nitrogen <br />MG/L <br />133 <br />0.771 <br />0.1 <br />6.4 <br />0.01 <br />H Temperature <br />DEG -C <br />53 <br />21.12 <br />21 <br />25 <br />17.8 <br />H Lab <br />S.U. <br />81 <br />8.34 <br />8.3 <br />8.8 <br />7.95 <br />Phosphorus, Ortho hos horus <br />MG/L <br />128 <br />0.06329 <br />0.0225 <br />1 <br />0.005 <br />Selenium Dissolved <br />UG/L <br />4 <br />0.83 <br />1 <br />1 <br />0.3 <br />Selenium Tot. Rec. <br />UG/L <br />100 <br />1.63 <br />1 <br />11 <br />0.1 <br />Silver Tot. Rec. <br />UG/L <br />105 <br />0.71 <br />0.5 <br />11 <br />0.1 <br />Sodium Dissolved <br />MG/L <br />133 <br />153.5 <br />110 <br />750 <br />18.6 <br />Sodium Adsorption Ratio <br />RATIO <br />183 <br />2.0278 <br />1.257 <br />11 <br />0.211 <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 />j 132 <br />82.5 <br />28 <br />1510 <br />2 <br />Specific Conductivity,Lab <br />UMS/CM <br />116 <br />2412 <br />2370 <br />4300 <br />693 <br />Sulfates <br />MG/L <br />155 <br />1099 <br />1100 <br />2140 <br />100 <br />Total Dissolved Solids Lab <br />MG/L <br />109 <br />2072 <br />2090 <br />3400 <br />480 <br />Zinc Tot. Rec. <br />UG/L <br />105 <br />37 <br />20 <br />410 <br />5 <br />2016 AHR FC POR <br />