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Energy Fuels Coal, Inc. Southfield Mine - 2004 Annua[ Hydrology Report Apri15, 2005 <br />TABLE 12 <br />OAK CREEK (UP STREAM) WATER QUALITY DATA <br />Monitorin Point OC-2 <br /> <br />Parameter <br />Units 2004 Sample Date: <br />04/13/04 12107/04 2004 <br />Average 1997 - 2004 <br />Min. Ave. Max. <br />pH (feld) units g.2 No flow g2 7.7 8.3 9.2 <br />Conductivity (Feld) umhos/cm 578.0 578.0 323.0 573.3 1162.0 <br />Temperature (feld) deg C 19.5 19.5 3.8 10.7 21.9 <br />Solids, total suspended mg/I 46.0 46.0 0.0 75.2 290.0 <br />Solids, total dissolved mg/I 400.0 400.0 240.0 475.8 780.0 <br />Oil and Grease (visual) yes/no No No n/a n/a n/a <br />SAR in water mg/I 0.85 0.65 0.0 0.79 1.3 <br />Bicarbonate as CaC03 mgll 196.0 196.0 145.0 215.0 265.0 <br />Calcium, t rec mg/I 71.2 71.2 43.4 81.34 126.0 <br />Chloride mg/I g.0 9.0 3.0 8.33 13.0 <br />Magnesium, t rec mg(I 20.30 20.30 13.90 23.24 36.30 <br />Nitrogen, nitrate/nitrate mg/I 0.08 0.08 0.03 0.26 0.74 <br />Selenium, t rec mg/I 0.001 0.001 0.000 0.001 0.002 <br />Phosphorus, ortho diss mg/1 0.04 0.04 0.000 0.024 0.138 <br />Sodium, t rec mg/I 29.8 29.8 15.40 39.33 74.20 <br />Sulfate mg/I 100.0 100.0 50.0 164.17 370.0 <br />Aluminum, t rec mg/I 2.48 2.48 0.060 2.385 7.870 <br />Arsenic, t rec mg/1 0.001 0.001 0.000 0.001 0.003 <br />Cadmium, t rec mg/I 0.000 0.000 0.000 0.001 0.006 <br />Copper, t rec mg/I 0.00 0.00 0.000 0.003 0.010 <br />Iron, t rec mg/I 2.43 2.43 0.040 2.553 8.840 <br />Lead, r rec mg/I 0.000 0.000 0.000 0.000 0.000 <br />Manganese, t rec mg/I 0.062 0.062 0.005 0.070 0.222 <br />Mercury, t rec mg/I 0.000 0.000 0.000 0.000 0.000 <br />Molybdenum, t rec mg/I 0.000 0.000 0.000 0.000 0.000 <br />Zinc, r rec mg/I 0.020 0.02 0.000 0.017 0.070 <br />NOTES: <br />-Zero data values =parameter was analyzed for but not detected. <br />- Blank data fields = no data. <br />- t rec =total recoverable <br />6417/2004 annualhydrpidoc NWCC INC. Page 28 <br />