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Annua` drology Report tile, Z o <br />•' <br />Report run on: March 29, 2007 8:42 AIL Twe0ile Coal Company <br />Projects 2003. Wil liams Fork Mine <br /> Station: 9P3 7NA FLUME (O.UTFALL #02 <br />4 <br />Cl <br />f <br /> . as si <br />icati on: DITCH <br />Category Parameter Anai sis Type Average <br />Std <br />'Dev <br />ANIONS <br />BICARBONATE <br />AS HC03 : Max Min Count Units Begin <br /> <br />CARBONATE <br />AS C03 666.00 31.08 698.00 626.00 4 MG/L 04/89 <br /> <br /> <br />CHLORIDE <br /> <br />NOT APPLICABLE 54.00 59.40 <br />96.00 <br />12.00 <br />2 <br />MG/L <br />10/89 <br /> <br /> <br />SULFATE <br /> <br />NOT APPLICABLE 14.40 5.68 <br />21.00 <br />9.00 <br />5 <br />MG/L <br />04/89 <br /> <br />CATIONS <br /> <br />CALCIUM <br /> <br />DISSOLVED 167.00 4.90 <br />173.00 <br />161.00 <br />?4 <br />MG/L <br />04/89 <br /> <br /> <br />MAGNESIUM <br /> <br />DISSOLVED 22.33 5.13 <br />28.00 <br />18.00 <br />3 <br />MG/L <br />04/89 <br /> <br /> <br />POTASSIUM <br /> <br />DISSOLVED 16.33 3.51 <br />20.00 <br />13.00 <br />3 <br />MG/L <br />04/89 <br /> <br />SAR <br />NOT APPLICABLE 5.00 0.00 5.00 5.00 1 MG/L 08/89 <br /> <br />SODIUM <br />DISSOLVED 13.31 4.01 19.20 10.24 4 UNDEFINED 04/89 <br /> <br />GASES <br />SULPHIDE <br />TOTAL 287.67 38.84 331.00 256.00 3 MG/L 04/89 <br /> <br />MEASURED PROPERTIES <br />FLOW RATE <br />FIELD 0.36 0.63 <br />2.60 <br />0.02 <br />18 <br />MG/L <br /> <br />08/89 <br /> <br />WATER LEVEL <br />FIELD 0.42 0.29 0.74 0.01 34 CFS CFS 01/90 <br /> <br />unknown 6420.25 0.16 6420.49 6420.00 134 FEET (MSL) 01/89 <br /> <br />MINOR <br />FLUORIDE FIELD 0.46 0.29 1.01 0.01 109 CFS <br />01/89 <br /> <br />NUTRIENTS <br />NITROGEN NOT APPLICABLE 1.30 0.00 1.30 1.30 1 MG/L 08/89 <br /> AMMIA-FREE 0.00 0.00 <br />0.00 <br />0.00 <br />1 <br />MG/L <br />08/89 <br /> AMMIUM-TOTAL 0.01 0.00 0.01 0 <br />01 1 MG/L <br /> <br />NITRATE <br />-0.01 <br />0.03 <br />0.03 . <br />-0.02 <br />4 <br />MG/L 08/89 <br />04/89 <br /> N03+NO2 -0.01 0.02 0.03 -0.02 4 MG/L 04/89 <br /> PHOSPHATE TOTAL-TOTAL -0.01 0 <br />00 <br /> <br />PHYSICAL PROPERTIES <br />ACIDITY <br />AS CAC03 . -0.01 -0.01 1 MG/L 08/89 <br /> <br /> <br />ALKALINITY <br /> <br />TOTAL -1.00 0.00 <br />-1.00 <br />-1.00 <br />1 <br />MG/L <br />06/00 <br /> <br />CONDUCTIVITY <br />FIELD 590.75 58.92 673.00 540.00 4 MG/L <br />04/89 <br /> 1593.08 208.14 2420.00 876.00 597 UMHOS/CM 01/89 <br /> <br />HARDNESS LAB <br />AS CAC03 1446.00 160.41 1730.00 1350.00 5 UMHOS/CM 04/89 <br /> <br />OIL&GREASE <br />NOT APPLICABLE 106.75 38.86 152.00 59.00 4 MG/L <br />04/89 <br /> <br />OIL&GREASE VISIBLE <br />NOT APPLICABLE 6.30 22.29 99.00 -2.00 20 MG/L 10/89 <br /> <br />PH <br />FIELD 2.00 0.00 2.00 2.00 363 UNDEFINED 01/89 <br /> <br /> <br />LAB 8.63 0.35 <br />9.67 <br />7.22 <br />598 <br />PH <br />01/89 <br /> <br />SOLIDS <br />SETTLEABLE 8.51 0.66 9.30 7.70 6 PH <br />04/89 <br /> <br />SUSPENDED -0.30 0.14 -0.20 -0.40 2 ML/L 06/90 <br /> <br />TOTAL-DISS 5.22 8.84 46.00 -6.00 232 MG/L <br />01 /89 <br /> <br />TEMPERATURE <br />FIELD 986.75 222.95 1474.00 -2.00 59 MG/L 03/89 <br /> <br />PRIMARY <br />ARSENIC <br />DISSOLVED 12.27 6.14 28.00 0.20 597 DEGREES C 01/89 <br /> <br /> <br />TOTAL 0.67 1.53 <br />2.00 <br />-1.00 <br />3 <br />UG/L <br />04/89 <br /> <br />BARIUM <br />DISSOLVED 2.00 0.00 2.00 .2.00 1 UG/L <br />06/90 <br /> 110.00 0.00 110.00 110.00 1 UG/L <br /> 08/89 <br />Page