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EFCI Southfield Mine -Year 2007Annual Hydrology Report April 21, 2008 <br />TABLE 6 <br />MW-23 WATER QUALITY DATA <br />PARAMETER UNITS 2007 Sample Dates: <br />6/18/2007 11/26/2007 2007 <br />AVERAGE 1979 - 2007 <br />MIN. AVE. MAX. <br />H lab units 8.70 8.60 8.65 6.200 8.19 8.80 <br />Conductiv' at 25C umhos/cm 1330 1350 1340 210 983 2820 <br />Tem rature field de C 15.5 12.5 14.0 10.0 14.7 24.5 <br />Solids, total dissolved m 850 830 840 156 834 1870 <br />Bicarbonate as CaCO3 m I 462 475 469 150 344 1100 <br />Calcium, dissolved m 4.1 3.7 3.9 2.2 7.4 39.4 <br />Chloride m I 19 17 18 3 16 24 <br />Ma nesium, dissolved m 0.50 0.50 0.50 0.00 0.83 7.00 <br />Nit en, ammonia m /l 0.00 0.00 0.00 0.00 0.27 5.50 <br />Nit en, nitrate nitrite m 0.28 0.40 0.34 0.04 0.38 0.64 <br />Phos horns, ortho m /l 0.11 0.06 0.085 0.00 0.06 0.23 <br />Phos horns, total m 0.00 0.06 0.07 <br />Sodium, dissolved m A 291 324 308 29 242 652 <br />Sulfate m /l 180 180 180 10 173 348 <br />Arsenic, dissolved m I 0.0036 0.0019 0.0028 0.0000 0.0014 0.0050 <br />Cadmium, dissolved m 0.00 0.00 0.00 0.00 0.00 0.01 <br />Iron, dissolved m /l 0.08 0.00 0.04 0.00 0.82 24.20 <br />Man anese, dissolved m /l 0.03 0.03 0.03 0.00 0.03 0.70 <br />Mercu ,dissolved m I 0.00 0.00 0.00 0.00 0.00 0.00 <br />Selenium, dissolved m A 0.00 0.00 0.00 0.00 0.00 0.05 <br />Zinc, dissolved m 0.03 0.02 0.03 0.00 0.02 0.24 <br />NOTES: <br />1. Zero data values =parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />2007 AHR.doc WP Page 1 S <br />