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EFCI Southfield Mine - 2008 Annual Hydrology Report April 15, 2009 <br />TABLE 14 <br />OAK CREEK (UPSTREAM) WATER QUALITY DATA <br />(Monitoring Point OC-2) <br /> <br />PARAMETER <br />UNITS 2008 Sample Dates: <br />2nd QTR. 4th QTR. 2008 <br />AVERAGE 1997- 2008 <br />MIN. AVE. MAX. <br /> 05/28/08 No Flow <br />H field units 7.9 7.9 7.7 8.3 9.2 <br />Conductivity field umhos/cm 1264 1264 323 622 1264 <br />-Temperature (field) de C 17.6 17.6 3.8 11.8 21.9 <br />Solids, total suspended m /I 12 12 0 78 290 <br />Solids, total dissolved m /I 860 240 498 860 <br />Oil and Grease (visual) es/no no no 0.0 0.0 0.0 <br />SAR in water m /I 3.13 3.13 0.00 0.95 3.13 <br />Bicarbonate as CaC03 m /I 301 301 145 220 301 <br />Calcium TR m /I 43.40 80.72 126.00 <br />Chloride m /I 16 16 3 9 16 <br />Magnesium TR m /I 13.90 23.05 36.30 <br />Nitrogen, nitrate nitrite m /I 0.16 0.16 0.00 0.23 0.74 <br />Selenium TR m /I 0.000 0.000 0.000 0.001 0.002 <br />Phosphorus, ortho m /I 0.03 0.03 0.00 0.03 0.14 <br />Sodium TR m /I 15.40 39.35 74.20 <br />Sulfate m /I 340 340 50 174 370 <br />Aluminum TR m /I 0.06 2.34 7.87 <br />Arsenic TR m /I 0.0000 0.0007 0.0030 <br />Cadmium TR m /I 0.00 0.00 0.01 <br />Co er TR mg/1 0.00 0.00 0.01 <br />Iron TR m /I 004 2.38 884 <br />Lead TR m /I 0.00 0.00 0.00 <br />Manganese TR m /I 0.01 0.07 0.22 <br />Mercury TR m /I 0.0000 0.0000 0.0003 <br />Molybdenum TR <br />1 m /I 0.00 0.00 0.00 <br />Zinc TR --mg/I 0.00 0.02 0.07 <br />NOTES: <br />1. Zero data values = parameter was analyzed for but not detected. <br />2. Blank data fields = no data. <br />2008 AHR.doc WP Page 27