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EFCI Southfield Mine - 2009 Annual Hydrology Report March 10, 2010 <br />TABLE 7 <br />MW-NW WATER QUALITY DATA <br />PARAMETER UNITS 2009 Sample Dates <br />06/01/09 12/01/09 2009 <br />AVERAGE 2003- 2009 <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 CaCO3 mg/l <br />Calcium, dissolved mg/l <br />Chloride mgA <br />Magnesium, dissolved mg/l <br />Nitrogen, ammonia mg/l <br />Nitrogen, nitrate nitrite mg/I <br />Phosphorus, ortho mg/I <br />Phosphorus, total mg/I <br />Sodium, dissolved mg/I <br />Sulfate mg/l <br />Arsenic, dissolved mgA <br />Cadmium, dissolved mg/l <br />Iron, dissolved mg/l <br />Manganese, dissolved mgA <br />Mercury, dissolved mg/l <br />Selenium, dissolved mg/I <br />Zinc, dissolved mg/l <br />Notes: <br />1. Zero data values = parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />2009 AHR.doc WP Page 15