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EFCI Southfield Mine - 2010 Annual Hydrology Report <br />May 30, 2011 <br />TABLE 7 <br />MW-NW WATER QUALITY DATA <br />PARAMETER UNITS 2010 Sample Dates <br />6/21/10 12/07/10 2010 <br />AVERAGE 2003 - 2010 <br />MIN. AVE. MAX. <br />pH (lab) units DRY DRY DRY n/a dry n/a <br />Conductivity at 25C umhos/cm <br />Temperature (field) deg C <br />Solids, total dissolved mg/I <br />Bicarbonate as CaC03 mg/l <br />Calcium, dissolved mg/I <br />Chloride mgA <br />Magnesium, dissolved mg/1 <br />Nitrogen, ammonia mg/I <br />Nitrogen, nitrate nitrite mg/I <br />Phosphorus, ortho mg/I <br />Phosphorus, total mgA <br />Sodium, dissolved mg/l <br />Sulfate mgA <br />Arsenic, dissolved mg/I <br />Cadmium, dissolved mg/I <br />Iron, dissolved mg/I <br />Manganese, dissolved mg/l <br />Mercury, dissolved mgA <br />Selenium, dissolved mg/I <br />Zinc, dissolved mg/I <br />Notes: <br />1. Zero data values = parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />2010 AHR text.doc Page 15