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TWENTYMILE COAL COMPANY <br />PERIOD OF RECORD WATER QUALITY DATA <br />SITE: AVF15 (WELL AVF-t5, FISH CREEK ALLUVIUM) DATUM = 6628.4 Well installed in June 2002 <br />CATEGORY PARAMETER ANALYSTS TYPE <br />~ UNITS JUN~ T JUN JUL AUG NOV FEB MAY <br />FIELD PARAMETERS DATE <br />WATER ELEVATION __ <br />~FT ABOVE MSL 6/13/2002 <br />662 6/18/2002 <br />6621.3 7/3/2002 <br />662].5 8/12/2002 <br />6616.96 11/12/2002 <br />6621.18 2/6/2003 <br />6622.35 5/12/2003 <br />6623.62 <br /> <br />PHYSICAL PROPERTIES WATER LEVEL <br />TEMPERATURE <br />FIELD ~ FT <br />DEGREES C 7.24 <br />11.7 7.12 <br />11,8 6.95 <br />12.3 DRY 7.22 <br />9.4 6.05 <br />4.6 4.78 <br />6.5 <br /> CONDUCTIVITY FIELD ~ UMHOS/CM 700 710 722 _ <br />520 590 573 <br /> LAB UMHOS/CM 780 370 620 <br /> PH FIELD PH 8.13 8.15 8.65 8.32 7.74 <br /> LAB PH 7.78 8.44 8.36 <br /> <br />CATIONS SOLIDS <br />CALCIUM <br />MAGNESIUM TOTAL-DISS MG/L _ <br />DISSOLVED MG/L <br />DISSOLVED MG/L 530 <br />~ 100 <br />24 300 <br />43 <br />28 380 <br />~ 58 <br />38 <br /> SODIUM DISSOLVED CMG/L Sl 3 43 <br />ANIONS BICARBONATE AS HCO3 MG/L 950 400, 340 <br /> CARBONATE AS CO3 MG/L < 1 < 1 < 1 <br />_ SULFATE NOT APPLICABLE MG/L 130 63 75 <br />PRib1ARY CADMIUM DISSOLVED UG/L <br />~ <5 <6 <5 <br /> LEAD DISSOLVED - <60 <50 ` <50 <br /> MERCURY DISSOLVED IUG/L <0.2 <0.2I <0.2 <br /> SELENIUM DISSOLVED '~UG/L <2 <21 <2 <br />SECONDARY IRON <br />~_- _ DISSOLVED BUG/L <10 <$ ~- <5 <br />J 1 <br /> <br />( <br />MANGANESE <br />DISSOLVED BUG/L ~ __-_ <br />860 -_ - <br />37130 ----~ <br />~ <br />TRACE METALS <br />NUTRIENTS MOLYBDENUM <br />NITROGEN DISSOLVED IUG/L <br />AMMIA-FREE MG/L <br />I <60 <br />0.42 <50 <50 <br /><0.05~ 0.06 <br /> NITRATE _ MG/L _ 0.06 _ 0.03 <0.02 <br /> NITRITE MG/L _ 0.0 ~ <0.02 _ <0.02 <br /> NO3+NO2 <br />~ MG/L 0.1 0.03 <0.02 <br /> PHOSPHATE ORTHO-DISS MG/L 0.11 _<0.01 0.02 <br />EXCEL: I:\EnvironmenWl\DMG\PR6\Water DalaWew Alluvial Well Da[a <br />