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TABLE: 6A <br />TWENTYMILE COAL, LLC <br />2015 ANNUAL HYDROLOGY REPORT <br />WATER QUALITY MONITORING DATA <br />Site: 93M001 (93M001, Bedrock Well) DATUM = 7013.52 <br />LOCATION CODE <br />93M001 <br />CHEMICAL NAME <br />Units <br />Average <br />Maximum <br />Minimum <br />Standard <br />Deviation <br />ALKALINITY as CaCO3 <br />MG/L <br />925.45 <br />1090 <br />478 <br />162.71 <br />BICARBONATE <br />MG/L <br />686.24 <br />908 <br />105 <br />213.01 <br />CADMIUM DISSOLVED <br />UG/L <br />1.1 <br />5 <br />0.1 <br />1.5 <br />CADMIUM TOTAL RECOV <br />UG/L <br />0.4 <br />0.4 <br />0.4 <br />0 <br />CALCIUM <br />MG/L <br />2.01 <br />4 <br />1.3 <br />0.753 <br />CARBONATE as CO3 <br />MG/L <br />216.99 <br />359 <br />111 <br />75.183 <br />CONDUCTIVITY SPC FIELD <br />UMHOS/CM <br />2110 <br />2970 <br />1720 <br />326 <br />CONDUCTIVITY SPC LAB <br />UMS/CM <br />2095 <br />3950 <br />1800 <br />506.5 <br />HARDNESS, CALCIUM <br />MG/L <br />12.93 <br />31 <br />6 <br />7.77 <br />HYDROXIDE as OH <br />MG/L <br />1.15 <br />24.5 <br />0.005 <br />4.76 <br />IRON DISSOLVED <br />UG/L <br />240 <br />4970 <br />5 <br />929 <br />IRON TOTAL RECOV <br />UG/L <br />24500 <br />24500 <br />24500 <br />0 <br />LEAD <br />UG/L <br />90 <br />200 <br />20 <br />70 <br />MAGNESIUM <br />MG/L <br />1.49 <br />5 <br />0.5 <br />1.03 <br />MANGANESE DISSOLVED <br />UG/L <br />14 <br />30 <br />5 <br />11 <br />MANGANESE TOTAL RECOV <br />UG/L <br />120 <br />120 <br />120 <br />0 <br />MERCURY DISSOLVED <br />UG/L <br />0.43 <br />1 <br />0.2 <br />0.37 <br />MERCURY TOTAL RECOV <br />UG/L <br />0.2 <br />0.2 <br />0.2 <br />0 <br />MOLYBDENUM DISSOLVED <br />UG/L <br />40 <br />100 <br />10 <br />30 <br />MOLYBDENUM TOTAL RECOV <br />UG/L <br />100 <br />100 <br />100 <br />0 <br />NITRATE NITROGEN <br />MG/L <br />0.029 <br />0.1 <br />0.02 <br />0.02 <br />NITRITE NITROGEN <br />MG/L <br />0.01 <br />0.02 <br />0.01 <br />0.005 <br />NITROGEN NO3-NO2 <br />MG/L <br />0.047 <br />0.1 <br />0.02 <br />0.035 <br />PH TEMPERATURE <br />DEG -C <br />22.8 <br />25 <br />22 <br />1.16 <br />PH FIELD <br />S.U. <br />9.438 <br />10.6 <br />8.4 <br />0.5125 <br />PH LAB <br />S.U. <br />9.46 <br />9.9 <br />8.89 <br />0.223 <br />PHOSPHORUS <br />MG/L <br />0.02 <br />0.02 <br />0.02 <br />0 <br />PHOSPHATE ORTHO <br />MG/L <br />0.0203 <br />0.051 <br />0.005 <br />0.0127 <br />SAR <br />RATIO <br />70.1504 <br />95 <br />47.9547 <br />13.7683 <br />SELENIUM DISSOLVED <br />UG/L <br />1.3 <br />5 <br />0.3 <br />1.1 <br />SELENIUM TOTAL RECOV <br />UG/L <br />2 <br />2 <br />2 <br />0 <br />SILVER <br />UG/L <br />0.5 <br />0.5 <br />0.5 <br />0 <br />SODIUM <br />MG/L <br />471 <br />723 <br />120 <br />111 <br />SOLIDS (TDS) <br />MG/L <br />1234 <br />2564 <br />980 <br />361.8 <br />SULFATE <br />MG/L <br />142.5 <br />1346 <br />1 <br />352.3 <br />TEMPERATURE FIELD <br />DEG -C <br />11.23 <br />19 <br />8 <br />2.268 <br />ZINC <br />UG/L <br />70 <br />70 <br />70 <br />0 <br />