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<br />TABLE 15 <br />BTU, EMPIRE CORPORATION <br />2008 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONITORING DATA <br />SITE: 9MN (9 MINE WELL, TWENTYMILE SANDSTONE) DATUM 6383.29 <br />CATEGORY PARAMETER ANALYSIS TYPE UNITS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC <br />FIELD PARAMETERS DATE 3/13/2008 5/6/2008 8/20/2008 1113/2008 <br /> WATER ELEVATION FT ABOVE MSL 6292.73 6293.88 6293.57 6291.62 <br /> WATER LEVEL Depth 90.56 89.41 89.72 91.67 <br />PHYSICAL PROPERTIES TEMPERATURE FIELD DEGREES C 11.4 13.1 13.2 12.9 <br /> CONDUCTIVITY FIELD UMHOS/CM 520 480 490 480 <br /> LAB UMHOS/CM 440 <br /> PH FIELD PH 7.59 7.46 7.56 7.54 <br /> LAB PH 7.62 <br /> ALKALINITY TOTAL MG/L 230 <br />CATIONS CALCIUM DISSOLVED MG/L 55 <br /> MAGNESIUM DISSOLVED MG/L 26 <br /> SODIUM DISSOLVED MG/L 17 <br />ANIONS BICARBONATE AS HC03 MG/L 280 <br /> CARBONATE AS C03 MG/L <1 <br /> CHLORIDE NOT APPLICABLE MG/L 5 <br /> SULFATE NOT APPLICABLE MG/L 18 <br />PRIMARY ARSENIC DISSOLVED UG/L <10 <br /> CADMIUM DISSOLVED UG/L <5 <br /> LEAD DISSOLVED UG/L <50 <br /> MERCURY DISSOLVED UG/L <0.2 <br /> SELENIUM DISSOLVED UG/L <2 <br />SECONDARY ZINC DISSOLVED UG/L 150 <br /> IRON DISSOLVED UG/L <10 <br /> MANGANESE DISSOLVED UG/L <50 <br />TRACE METALS BORON DISSOLVED UG/L 30 <br /> MOLYBDENUM DISSOLVED UG/L <50 <br />NUTRIENTS <br />1 <br />NITROGEN <br />NITRATE <br />MG/L <br />0.02 <br /> <br />i <br />G:\Envirmm)ental\EMPIRE\AHR\2008\Tables 2008\SAMPLING.xls