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EM Southfield Mine - 2010 Annual Hydrology Report May 30, 2011 <br />TABLE 12 <br />MAGPIE CREEK (DOWNSTREAM) WATER QUALITY DATA <br />(Monitoring Point MC-2) <br />PARAMETER UNITS 2010 Sample Date: <br />2nd QTR. 4th QTR. 2010 <br />AVERAGE 1997 - 2010 <br />MIN. AVE. MAX. <br /> No Flow No Flow No Flow <br />pH (field) units 6.2 7.4 8.3 <br />Conductivity field umhos/cm 53 241 360 <br />Temperature (field) de C 5.2 14.0 25.8 <br />Solids, total suspended m /I 64 302 678 <br />Solids, total dissolved m g/1 110 230 340 <br />Oil and Grease (visual) es/no 0 0 0 <br />SAR in water m /I 0.00 0.32 0.56 <br />Bicarbonate as CaC03 m /I 16 21 27 <br />Calcium m /I 4 35 57 <br />Chloride m /I 0 1 2 <br />Magnesium m /I 4.9 14.7 43.0 <br />Nitrogen, nitrate nitrite m /I 0.09 0.41 1.23 <br />Selenium m /I 0.0 0.0 0.0 <br />Phosphorus, ortho m /I 0.00 0.05 0.17 <br />Sodium m /I 3 11 17 <br />Sulfate m /I 30 120 190 <br />Aluminum m /I 9.12 49.04 188.00 <br />Arsenic m /I 0.0010 0.0057 0.0200 <br />Cadmium m g/1 0.000 0.001 0.007 <br />-Copper m /I 0.00 0.07 0.29 <br />Iron m g/1 7.01 48.46 193.00 <br />Lead m /I 0.00 0.00 0.00 <br />Manganese m g/1 0.171 0.899 3.490 <br />-Mercury m /I 0.00 0.00 0.00 <br />-Molybdenum m /I 0.00 0.00 0.00 <br />Zinc m /I 0.0 0.2 03 <br />NOTES: <br />1. Zero data values = parameter was analyzed for but not detected. <br />2. Blank data fields = no data. <br />2010 AHR text.doc Page 22