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Energy Fuels Coal, Inc. Southfield Mine - 2004 Annual Hydrology Report Apri15, 2005 <br />TABLE 7 <br />MW-23 WATER QUALITY DATA <br /> Sample Dates 2004 1979 - 2004 <br />Parameter Units <br />06/07/04 <br />12/07/04 <br />Avera a <br />Min. <br />Ave. <br />Max. <br />pH Ilab) units 8.6 8.4 8.5 6.2 ~ 8.1 8.8 <br />Conductivity at 25C umhos/cm 1200 1020 1110 210 949 2820 <br />Temperature (field) de C 16.3 12.9 14.6 10.0 14.7 24.5 <br />Solids, total dissolved m /I 750 740 745 156 612 1870 <br />Bicarbonate as CaC03 m /I 438 435 437 150 329 1100 <br />Calcium, dissolved m /I 2.8 3.8 3.3 2.2 7.7 39.4 <br />Chloride m A 17 15 16 3.2 15.7 24.0 <br />Ma nesium, dissolved m /I 0.4 0.5 0.45 0.00 0.86 7.00 <br />Nitro en, ammonia m /I 0.0 0.0 0.0 0.00 0.30 5.50 <br />Nitro en, nitrate nitrite m /I 0.44 0.14 0.29 0.04 0.38 0.64 <br />Phosphorus, ortho m /I 0.06 0.06 0.06 0.00 0.06 0.23 <br />Phos horns, total m /I 0.00 0.06 0.07 <br />Sodium, dissolved m /I 264 291 278 28.5 235.6 652.0 <br />Sulfate m /I 180.0 170.0 175.0 9.8 172.8 348.0 <br />Arsenic, dissolved m /I 0.002 0.002 0.002 0.000 0.001 0.005 <br />Cadmium, dissolved m /l 0.000 0.000 0.000 0.000 0.000 0.008 <br />Iron, dissolved m /I 0.020 0.000 0.010 0.000 0.866 24.200 <br />Man anese, dissolved m /I 0.009 0.000 0.005 0.000 0.034 0.697 <br />Mercur ,dissolved m /I 0.000 0.000 0.000 O.ODO 0.000 0.001 <br />Selenium, dissolved m /I 0.000 0.000 0.000 0.000 0.002 0.053 <br />Zinc, dissolved m /I 0.020 0.010 0.015 0.000 0.023 0.241 <br />Notes: <br />1 . Zero data values =parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />6417/2004 annualhydrpt.doc NWCC INC. Page 19 <br />