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EFCI Southfield Mine -Year 2007 Annual Hydrology Report April 2l, 2008 <br />TABLE 4 <br />MW-10 WATER QUALITY DATA <br />Parameter UnRs Sam le Dates 1979 - 2001.. <br /> Min. Ave. Max. <br />H lab units Discont. Discont. 6.8 7.7 8.6 <br />Condudiv' at 25C umhos/cm 614 910 1310 <br />Tem nature field d C 12.0 14.9 25.0 <br />Solids total dissolved m 11 340 595 976 <br />Bicarbonate as CaC03 m !I 196 280 376 <br />Calcium dissolved m A 4.5 37.1 84.0 <br />Chloride m A 4.0 10.0 40.0 <br />Ma nesium dissolved m fl 2.10 7.06 17.00 <br />Nitr en ammonia m /l 0.20 6.99 23.30 <br />Nitr en nitrate nitrite m 0.00 - -- 0:58 14.40 <br />Phos horns ortho m 11 0.000 1.302 2.520 <br />Phos horns total m A 0.000 0.040 0.100 <br />Sodium dissolved m A 89 154 320 <br />Sulfate m /I 78 160 362 <br />Arsenic dissolved m /l 0.000 0.000 0.001 <br />Cadmium dissolved m /l 0.000 0.000 0.006 <br />Iron dissolved m R 0.000 0.627 8.000 <br />Man anew dissolved m /I 0.000 0.100 0.980 <br />Mercu dissolved m /I 0.000 0.000 0.001 <br />Selenium dissolved m /I 0.000 0.001 0.026 <br />Zinc dissolved m A 0.000 0.029 0.124 <br />Notes: <br />1. Zero data values =parameter was analyzed for but not detected. <br />2. Blank data field = no data. <br />3. MW-10 has been dry from Sept. 1996 to present except for March 2001(historic averages based on previous years when <br />mples could be obtained) <br />. Monitorin discontinued in Oct. 2003 <br />2007 AHR.doC WP Page 13 <br />