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EFCI Southfield Mine -Year 2007 Annual Hydrology Report April 11, 2008 <br />TABLE 7 <br />MW-65 WATER QUALITY DATA <br />PARAMETER UNITS 2007 Sample Dates: <br />6/18/2007 11/268007 2007 <br />AVERAGE 1984 - 2007 <br />MIN. AVE. MAX. <br />pH lab) units 8.3 8.1 8.2 7.2 8.0 8.8 <br />Conductiv' at 25C umhos/an 1950 1920 1935 770 1849 2320 <br />Temperature (field) d C 14.8 12.8 13.8 9.4 14.5 19.0 <br />Solids, total dissolved m 1140 1130 1135 1040 1137 1330 <br />Bicarbonate as CaCO3 m I 779 777 778 198 734 830 <br />Calcium, dissolved m /I 15.2 16.1 15.7 0.0 14.5 36.0 <br />Chbride m I 149 140 145 60 149 630 <br />M rresium, dissolved m 2.90 3.10 3.00 2.00 2.98 8.00 <br />N' en, ammonia m 1.49 1.23 1.36 0.00 1.13 2.50 <br />N' en, nitrate nitrite 0.00 0.04 0.02 0.00 0.18 2.66 <br />Phosphorus, ortho m 0.14 0.13 0.14 0.00 0.09 0.64 <br />Ph horns, total m 0.07 0.11 0.16 <br />Sodium, dissolved m 407 454 431 370 445 543 <br />Sulfate m 50 60 55 12 81 587 <br />Arsenic, dissolved 0.0008 0.0023 0.0016 0.0000 0.0007 0.0023 <br />Cadmium, dissolved 0.00 0.00 0.00 0.00 0.00 0.01 <br />.Iron, dissolved I 0.04 0.04 0.04 0.02 0.20 1.81 <br />Ma anew, dissolved m 0.14 0.15 0.14 0.02 0.12 0.16 <br />Mer+cu ,dissolved 0.00 0.00 0.00 0.00 0.00 0.00 <br />Selenium, dissolved m 0.00 0.00 0.00 0.00 0.00 0.01 <br />Zinc, dissolved 0.02 0.03 0.03 0.00 0.02 0.06 <br />NOTES: <br />1. Zero data values = parameter was analyzed for but not detsded. <br />2. Blank data field = no data. <br />2007 AHR.doc WP Page 16 <br />