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EFCI Southfield Mine - 2011 Annual Hydrology Report April 25, 2012 <br />PARAMETER <br />pH (lab) <br />Conductivity at 25C <br />- - -- - - - - - -- - --- - - - -- - <br />Temperature (field) <br />Solids, total dissolved <br />Bicarbonate as CaCO3 <br />Calcium, dissolved <br />Chloride <br />Magnesium, dissolved <br />Nitrogen, ammonia <br />Nitrogen, nitrate nitrate <br />Phosphorus, ortho <br />Phosphorus, total <br />Sodium, dissolved <br />Sulfate <br />Arsenic, dissolved <br />Cadmium, dissolved <br />Iron, dissolved <br />Manganese, dissolved <br />Mercury, dissolved <br />2011 AHR text doc <br />TABLE 7 <br />MW -NW WATER QUALITY DATA <br />UNITS 2011 Sample Dates 2011 <br />6/21/10 <br />units DRY <br />umhos /cm <br />deg C <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg/I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />mg /I <br />Selenium, dissolved mg /I <br />Zinc, dissolved <br />1 mg /I <br />12/07/10 <br />DRY <br />Notes: <br />1. Zero data values = parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />Page 15 <br />AVERAGE <br />DRY <br />T <br />2003 — 2011 <br />MIN. AVE. <br />n/a dry <br />MAX. <br />n/a <br />