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EFCI Southfield Mine — 2012 Annual Hydrology Report April 18, 2013 <br />TABLE 7 <br />MW -NW WATER QUALITY DATA <br />PARAMETER UNITS 2012 Sample Dates ' 2012 <br />2003-2012 <br />6/13/12 11/28/12 AVERAGE <br />MIN. AVE. MAX. <br />pH (lab) units DRY DRY DRY <br />n/a dry n/a <br />Conductivity at 25C umhos/cm <br />Temperature (field) deg C <br />J <br />Solids, total dissolved <br />I mg/I <br />Bicarbonate as CaCO3 mg/I 1 <br />Calcium, dissolved mg/I <br />Chloride mg/I <br />Magnesium, dissolved mg/I <br />Nitrogen, ammonia mg/I <br />Nitrogen, nitrate nitrite mg/1 <br />Phosphorus, ortho mg/I - - <br />- - - <br />Phosphorus, total mg/I - <br />- <br />Sodium, dissolved mg/I <br />Sulfate i mg/I <br />Arsenic, dissolved mg/I <br />Cadmium, dissolved mg/I <br />Iron, dissolved mg/I <br />Manganese, dissolved mg/I j <br />— <br />Mercury, dissolved mg/I <br />Selenium, dissolved mg/I <br />T <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 />2012 AHR text doc Page 17 <br />