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EFCI Southfield Mine -Year 2007 Annual Hydrology Report April 21, 2008 <br />TABLE 5 <br />MW-16 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 DRY DRY DRY 6.80 7.76 8.60 <br />Conductivi at 25C umhos/cm 1190 2322 4980 <br />Tem nature field C 12.0 14.7 19.5 <br />Solids, total dissolved m I 704 1657 3710 <br />Bicarbonate as CaCO3 m A 192 538 1100 <br />Ca~ium, dissolved m 1.1 42.0 220.0 <br />Chloride m /I 6 60 279 <br />Ma nesium, dissolved m 0.00 6.30 33.70 <br />N' en, ammonia m n 0.00 0.94 36.00 <br />N' n, nitrate nitrite 0.00 4.13 24.80 <br />Pho horns, ortho m 0.00 0.03 0.20 <br />Ph horns, total m I 0.00 0.09 0.31 <br />Sodium, dissolved m /I 197 530 980 <br />Sulfate fl 51 713 1850 <br />Arsenic, dissolved m /I 0.0000 0.0007 0.0040 <br />Cadmium, dissolved m 0.00 0.00 0.01 <br />Iron, dissolved 11 0.00 0.81 8.80 <br />Ma anew, dissolved m /l 0.00 0.03 0.27 <br />Menu .dissolved m 0.00 0.00 0.00 <br />Selenium, dissolved 0.00 0.00 0.05 <br />Zinc, dissolved m !I 0.00 0.04 0.27 <br />NOTES: <br />1. Zero data values used for parameters analyzed for but not detected above MDL. <br />Z. Blank data field = no data. <br />3. MW-16 -dry beginning in 2001 -March 2003 and periodically since (averages based on all previous years samples) <br />zoos AHR.doo wP Page 14 <br />