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TABLE: 7A <br />TWENTYMILE COAL COMPANY <br />2015 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />SITE: 066117 (WELL 006-BRDH7, TWENTYMILE SANDSTONE) DATUM = 6826.50 <br />LOCATION CODE <br />06BR7 <br />CHEMICAL NAME <br />Units <br />Average <br />Maximum <br />Minimum <br />Standard <br />Deviation <br />ALKALINITY as CaCO3 <br />MG/L <br />363.6 <br />400 <br />331 <br />32.1 <br />AMMONIA NITROGEN <br />MG/L <br />0.059 <br />0.059 <br />0.059 <br />0 <br />BICARBONATE as HCO3 <br />MG/L <br />391.2 <br />430.8 <br />367.2 <br />29.93 <br />CADMIUM <br />UG/L <br />0.42 <br />0.5 <br />0.1 <br />0.18 <br />CALCIUM <br />MG/L <br />2.38 <br />3.7 <br />1.4 <br />0.944 <br />CARBONATE as CO3 <br />MG/L <br />24.28 <br />32 <br />17 <br />6.344 <br />CONDUCTIVITY SPC FIELD UMHOS/CM <br />803.6 <br />1021 <br />610 <br />105.1 <br />CONDUCTIVITY SPC LAB <br />UMS/CM <br />799 <br />855 <br />722 <br />51 <br />HARDNESS, CALCIUM <br />MG/L <br />5.8 <br />13 <br />1 <br />4.604 <br />HYDROXIDE as OH <br />MG/L <br />2 <br />2 <br />2 <br />0 <br />IRON <br />UG/L <br />60 <br />100 <br />30 <br />30 <br />LEAD <br />UG/L <br />60 <br />200 <br />20 <br />80 <br />MAGNESIUM <br />MG/L <br />0.98 <br />2 <br />0.4 <br />0.63 <br />MANGANESE <br />UG/L <br />18 <br />50 <br />5 <br />19 <br />MERCURY <br />UG/L <br />0.2 <br />0.2 <br />0.2 <br />0 <br />MOLYBDENUM <br />UG/L <br />40 <br />100 <br />10 <br />40 <br />NITRATE NITROGEN <br />MG/L <br />0.04 <br />0.1 <br />0.02 <br />0.035 <br />NITRITE NITROGEN <br />MG/L <br />0.01 <br />0.01 <br />0.01 <br />0 <br />NITROGEN NO3-NO2 <br />MG/L <br />0.04 <br />0.1 <br />0.02 <br />0.035 <br />PH FIELD <br />S.U. <br />8.96 <br />9.7 <br />7.7 <br />0.377 <br />PH LAB <br />S.U. <br />8.6 <br />8.6 <br />8.6 <br />0 <br />PHOSPHATE ORTHO <br />MG/L <br />0.049 <br />0.078 <br />0.024 <br />0.0245 <br />SAR <br />RATIO <br />29.7102 <br />50.221 <br />0.03 <br />19.4682 <br />SELENIUM <br />UG/L <br />1 <br />1 <br />1 <br />0 <br />SODIUM <br />MG/L <br />201 <br />214 <br />186 <br />12.4 <br />SOLIDS (TDS) <br />MG/L <br />490 <br />540 <br />440 <br />38 <br />SULFATE <br />MG/L <br />76 <br />100 <br />50 <br />23 <br />TEMPERATURE FIELD <br />DEG -C <br />12.16 <br />19 <br />4 <br />3.786 <br />