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EFCI Southfield Mine -Year 2007 Annual Hydrology Repor! April 21, 2008 <br />TABLE 13 <br />OAK CREEK (DOWNSTREAM) WATER QUALITY DATA <br />(Monitoring Point OC-1) <br /> <br />PARAMETER <br />UNITS 2007 Sample Dates: <br />2nd QTR. 4th QTR. 2007 <br />AVERAGE 1983 - 2007 <br />MIN. AVE. MAX. <br /> o5ro3/o7 11~27~07 <br />H (field units 8.7 7.7 8.2 6.1 8.0 9.5 <br />Condudiv' (field umhoslcm 532 1017 775 64 59 141 <br />Tem nature (field d C 19.1 8.4 13.8 4.4 13.2 28.0 <br />Solids, total suspended m I 236 236 0 6 26748 <br />Solids, total dissolved m A 200 731 1434 <br />Oil and Grease visual es/no no no 0 0 0 <br />SAR in water m 0.72 0.72 0. 1.92 3.8 <br />Bicarbonate as CaC03 m I 0.0 211.7 323. <br />Calaum TR m 96.30 96.30 42.00 108.7 191. <br />Chloride m I 2.0 11.63 26.00 <br />M nesium TR m n 26.60 26.60 7.0 29.3 50.0 <br />Nit en, nitrate nitrite m 0.04 0.6 4.10 <br />Selenium TR m /l 0.000 0 0.000 0.001 0.004 <br />Phos horns, ortho m 0.0 0.01 0.11 <br />Sodium TR m A 76. 76.5 10.0 102.4 330. <br />Sulfate m I 0.67 347. 860. <br />Aluminum TR m 3.92 0.13 2.03 0. 10.7 453. <br />Arsenic TR m 0.0000 0.0000 0.0000 0.0120 0.5200 <br />Cadmium TR m 0. 0. 0. 0. 0. <br />C r TR m 0.01 0. 0.01 0. 0.0 0. <br />Iron TR m 0.23 0.23 0. 14. 610. <br />Lead TR 0. 0. 0. 0.00 0.0 0. <br />Man anew TR m /I 0.08 0.08 0.0 0.3 12.2 <br />Mercu T m 0.0000 0.0000 0.0000 0.0001 0.0030 <br />Mo denum TR m I 0.00 0. 0.00 0.0 0. 0.01 <br />Zinc TR m /l 0.03 0.03 0.00 0.08 2.54 <br />NOTES: <br />1. Zero data values =parameter was analyzed for but not deteded. <br />2. Blank data fields = no data. <br />2007 AHR.dOC WP Page 25 <br />