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TABLE: 21A <br />TWENTYMILE COAL, LLC <br />2016 ANNUAL HYDROLOGY REPORT <br />WATER QUALITY MONITORING DATA <br />PERIOD OF RECORD <br />Site: 08AV2 (008 -AV -2, Alluvial Well) DATUM = 6677.1 <br />Location Code <br />I <br />08AV2 <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 />73 <br />324 <br />322 <br />386 <br />254 <br />Alkalinity,Bicarbonate as CaCC3 <br />MG/L <br />2 <br />439 <br />439 <br />442 <br />435 <br />Ammonia Nitrogen <br />MG/L <br />89 <br />0.202 <br />0.05 <br />5 <br />0.001 <br />Cadmium Dissolved <br />UG/L <br />98 <br />2.55 <br />0.5 <br />20 <br />0.1 <br />Calcium Dissolved <br />MG/L <br />108 <br />187 <br />187 <br />570 <br />21 <br />Carbonate as CO3 <br />MG/L <br />63 <br />7.475 <br />2 <br />20 <br />0 <br />Chloride <br />MG/L <br />23 <br />10 <br />11 <br />14 <br />6 <br />Hydroxide as OH <br />MG/L <br />1 40 <br />10 <br />10 <br />20 <br />2 <br />Iron Dissolved <br />UG/L <br />108 <br />643 <br />150 <br />23000 <br />5 <br />Lead Dissolved <br />UG/L <br />90 <br />80 <br />40 <br />300 <br />20 <br />Magnesium Dissolved <br />MG/L <br />108 <br />75.76 <br />77.5 <br />120 <br />7.4 <br />Manganese Dissolved <br />UG/L <br />107 <br />1270 <br />1100 <br />4310 <br />5 <br />Mercury Dissolved <br />UG/L <br />98 <br />0.444 <br />0.2 <br />5 <br />0.1 <br />Molybdenum Dissolved <br />UG/L <br />90 <br />50 <br />1 50 <br />300 <br />10 <br />NO3-NO2 Nitrogen <br />MG/L <br />108 <br />0.226 <br />0.11 <br />3.1 <br />0.02 <br />H Temperature <br />DEG -C <br />20 <br />22.12 <br />22 <br />25 <br />18.9 <br />H Lab <br />S.U. <br />45 <br />7.71 <br />7.61 <br />8.3 <br />6.91 <br />Phosphorus, Ortho hos horus <br />MG/L <br />97 <br />0.023 <br />0.01 <br />0.29 <br />0.005 <br />Selenium Dissolved <br />UG/L <br />98 <br />1.63 <br />1 <br />16 <br />0.1 <br />Selenium Tot. Rec. <br />UG/L <br />3 <br />30 <br />30 <br />40 <br />30 <br />Sodium Dissolved <br />MG/L <br />108 <br />85.25 <br />1 85.9 <br />142 <br />8.6 <br />Sodium Adsorption Ratio <br />RATIO <br />74 <br />1.2809 <br />1.2638 <br />2.1456 <br />0.9304 <br />Solids Total Suspended <br />MG/L <br />1 <br />38 <br />38 <br />38 <br />38 <br />Specific Conductivity,Lab <br />UMS/CM <br />85 <br />1607 <br />1620 <br />2420 <br />1180 <br />Sulfates <br />MG/L <br />109 <br />610 <br />613 <br />1070 <br />348 <br />Total Dissolved Solids Lab <br />MG/L <br />109 1 <br />1216 <br />1230 <br />1970 <br />808 <br />2016 AHR FC POR <br />