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Annua?jdrology Report 1-a 4 A 0 <br />' Twen?ymile coal company <br />Report run on: March 29, 2007 8:18 Ah Page 1 <br />Project: 2003 Williams Fork Mine Station: T7A TR-7A Classification: WELL <br />Category Parameter Analysis Type Average Std;Dev Max Min Count Units Begin End <br />ANIONS BICARBONATE AS HC03 187.48 54.20 287.00 46.36 27 MG/L 03/81 06/00 <br /> CARBONATE AS CAC03 25.50 10.61 33.00 18.00 2 MG/L 06/96 06/98 <br /> AS C03 24.53 33.94 156.00 -2.00 19 MG/L 03/81 06/00 <br /> CHLORIDE NOT APPLICABLE 3.78 2.15 8.00 1.00 27 MG/L 03/81 06/00 <br /> HYDROXIDE AS CAC03 -2.00 0.00 -2.00 -2.00 2 MG/L 06/96 06/98 <br /> AS OH -1.00 1.15 0.00 -2.00 4 MG/L 06/92 06/99 <br /> SULFATE NOT APPLICABLE 24.85 25.74 85.00 -10.00 27 MG/L 03/81 06/00 <br />CATIONS CALCIUM DISSOLVED 8.07 6.92 28.00 2.00 19 MG/L 06/83 06/00 <br /> TOTAL RECOV 3.88 2.42 9.00 1.00 8 MG/L 03/81 12/82 <br /> MAGNESIUM DISSOLVED 24.85 6.29 32.00 14.00 19 MG/L 06/83 06/00 <br /> TOTAL RECOV 13.69 1.71 15.00 10.00 8 MG/L 03/81 12/82 <br /> POTASSIUM DISSOLVED 8.30 0.00 8.30 8.30 1 MG/L 06/83 06/83 <br /> TOTAL RECOV 6.39 1.08 8.10 5.00 8 MG/L 03/81 12/82 <br /> SAR NOT APPLICABLE 2.34 1.10 4.34 1.03 23 UNDEFINED 03/81 06/96 <br /> SODIUM DISSOLVED 38.79 12.09 63.00 19.60 19 MG/L 06/83 06/00 <br /> TOTAL RECOV 63.75 6.45 78.00 59.00 8 MG/L 03/81 12/82 <br />MEASURED PROPERTIES WATER LEVEL FIELD 6109.54 5.76 6119.20 6096.10 32 FEET (MSL) 03/84 . 10/91 <br />MINOR FLUORIDE NOT APPLICABLE 0.43 0.19 0.88 0.20 22 MG/L 03/81 06/94 <br />NUTRIENTS NITROGEN NITRATE 0.00 0.03 0.05 -0.02 18 MG/L 03/85 06/00 <br /> NITRITE 0.00 0.01 0.02 -0.01 5 MG/L 06/92 06/99 <br /> N03+NO2 0.03 0.09 0.35 -0.02 22 MG/L 03/81 06/99 <br />PHYSICAL PROPERTIES ACIDITY AS CAC03 0.00 0.00 0.00 0.00 1 MG/L 03/85 03/85 <br /> ALKALINITY TOTAL 176.17 30.53 231.00 127.00 24 MG/L 03/81 06/00 <br /> CONDUCTIVITY FIELD 396.97 87.23 850.00 122.00 86 UMHOS/CM 01/82 07/02 <br /> LAB 383.26 68.90 600.00 265.00 27 UMHOS/CM 03/81 06/00 <br /> HARDNESS AS CAC03 97.46 35.23 149.00 51.00 18 MG/L 03/81 06/96 <br /> OIL&GREASE VISIBLE NOT APPLICABLE 2.00 0.00 2.00 2.00 10 UNDEFINED 03/93 12/96 <br /> PH FIELD 8.68 0.51 10.10. 7.10 86 PH 01/82 07/02 <br /> LAB 8.68 0.65 10.14 6.50 27 PH 03/81 06/00 <br /> SOLIDS SUSPENDED 18.00 14.14 28.00 8.00 2 MG/L 03/81 03/85 <br /> TOTAL-DISS 244.36 51.90 426.00 190.00 22 MG/L 03/81 06/94 <br /> TEMPERATURE FIELD 11.94 2.59 21.00 5.40 81 DEGREES C 05/82 07/02 <br />PRIMARY ARSENIC DISSOLVED -2.47 9.45 10.00 -40.00 19 UG/L 06/83 06/00 <br /> TOTAL RECOV 0.50 2.51 5.00 -2.00 8 UG/L 03/81 12/82 <br /> BARIUM DISSOLVED -200.00 0.00 -200.00 -200.00 1 UG/L .06/83 06/83