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EFCI Southfield Mine - 2012 Annual Hydrology Report April 18, 2013 <br />2012 AHR text.doc Page 14 <br />TABLE 4 <br />MW -16 WATER QUALITY DATA <br />PARAMETER <br />UNITS 2012 Sample Dates: 2012 <br />06/13/12 11/28/12 AVERAGE <br />MIN. <br />1979-2012 <br />AVE. <br />MAX. <br />H lab <br />units DRY DRY DRY <br />6.8 <br />7.8 <br />8.6 <br />Conductivity at 25C <br />umhos/cm <br />1190 <br />2322 <br />4980 <br />Temperature field <br />deg C <br />12.0 <br />147 <br />195 <br />Solids, total dissolved <br />m /I <br />704 <br />1657 <br />3710 <br />Bicarbonate as CaCO3 <br />m I <br />192 <br />538 <br />1100 <br />Calcium, dissolved <br />m /l <br />1.1 <br />420 <br />2200 <br />Chloride <br />m /I <br />6 <br />60 <br />279 <br />Magnesium, dissolved <br />m /I <br />0.0 <br />6.3 <br />33.7 <br />Nitrogen, ammonia <br />m /I <br />0.00 <br />094 <br />36.00 <br />Nitrogen, nitrate nitrite <br />m /1 <br />0.00 <br />4.13 <br />24.80 <br />Phosphorus, ortho <br />m I <br />000 <br />0.03 <br />0.20 <br />Phosphorus, total <br />m /l <br />0.00 <br />0.09 <br />0.31 <br />Sodium, dissolved <br />m /I <br />197 <br />530 <br />980 <br />Sulfate <br />m /I <br />51 <br />713 <br />1850 <br />Arsenic, dissolved <br />m /l <br />0.0000 <br />0.0007 <br />0.0040 <br />Cadmium, dissolved <br />m /l <br />0.00 <br />000 <br />001 <br />Iron, dissolved <br />m /I <br />0.00 <br />0.81 <br />8.80 <br />Manganese, dissolved <br />m /l <br />0.000 <br />0.029 <br />0.270 <br />Mercury, dissolved <br />m /I <br />00000 <br />0.0001 <br />0.0017 <br />Selenium, dissolved I <br />m /l <br />0.000 <br />0.005 <br />0.053 <br />inc, dissolved <br />m /I <br />r 0.00 <br />0.04 <br />0.27 <br />NOTES: <br />1. Zero data values used for parameters analyzed for but not detected above MDL. <br />2. Blank data field = no data. <br />3 MW -16 - dry 2001 through March 2003, and 2006 through 2011 <br />(quality values shown are based on all previous years samples) <br />2012 AHR text.doc Page 14 <br />