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Annual ~,~ology Report S~ <br />Twentymile Coal Company <br />Report run on: February 23, 200712:15 Pll Page 1 <br />Project: 2000 Foidel Creek Mine Station: 087758 008-77-58 Classification: WELL <br />Category Parameter Analysis Type Average Std Dev Max Min Count Units Begin End <br />ANIONS BICARBONATE AS HC03 466.47 162.81 874.74 28.00 68 MG/L 05/79 05/06 <br /> CARBONATE AS C03 3.70 9.88 39.60 -2.00 31 MG/L 02/80 04/05 <br /> CHLORIDE NOT APPLICABLE 13.74 9.69 43.00 -3.00 30 MG/L 07/79 04/86 <br /> HYDROXIDE AS OH -2.00 0.00 -2.00 -2.00 10 MG/L 05/95 09/99 <br /> SULFATE NOT APPLICABLE 535.46 303.16 1750.00 19.00 70 MG/L 03/79 05/06 <br />CATIONS CALCIUM DISSOLVED 80.13 45.10 213.00 4.00 70 MG/L 03/79 05/06 <br /> MAGNESIUM DISSOLVED 53.97 35.23 159.00 -1.00 70 MG/L 03/79 05/06 <br /> POTASSIUM DISSOLVED 5.15 1.95 9.40 1.20 28 MG/L 03/79 04/83 <br /> SAR NOT APPLICABLE 7.48 6.23 22.94 0.71 65 UNDEFINED 03/79 09/99 <br /> SODIUM DISSOLVED 238.10 144.13 642.00 9.00 70 MG/L 03/79 05/06 <br />MEASURED PROPERTIES WATER LEVEL FIELD 6708.10 3.91 6716.40 6700.40 64 FEET (MSL) 03/79 09/92 <br />MINOR FLUORIDE NOT APPLICABLE 1.01 1.35 3.90 -0.50 12 MG/L 08/79 09/91 <br />NUTRIENTS NITROGEN AMMIA-FREE 0.02 0.04 0.11 0.00 11 MG/L 03/81 09/90 <br /> AMMIUM-TOTAL 1.92 1.89 5.70 -0.02 10 MG/L 10/83 09/90 <br /> NITRATE 0.08 0.33 1.85 -0.02 35 MG/L 10/86 04/05 <br /> NITRITE -0.01 0.01 0.00 -0.02 20 MG/L 10/86 04/05 <br /> N03+N02 0.64 1.78 9.00 -0.10 65 MG/L 06/79 05/06 <br /> PHOSPHATE ORTHO-DISS 0.07 0.16 0.62 -0.02 48 MG/L 03/80 04/05 <br />PHYSICAL PROPERTIES ACIDITY AS CAC03 12.00 0.00 12.00 12.00 1 MG/L 03/81 03/81 <br /> ALKALINITY TOTAL 420.30 23.14 459.00 346.00 27 MG/L 10/86 05/06 <br /> CONDUCTIVITY FIELD 1482.94 319.68 2390.00 880.00 68 UMHOS/CM 07/79 05/03 <br /> LAB 1573.77 143.82 1820.00 1210.00 35 UMHOS/CM 12/87 05/06 <br /> HARDNESS AS CAC03 400.94 262.48 1000.00 -14.00 60 MG/L 03/79 09/99 <br /> PH FIELD 7.52 0.52 9.50 6.52 68 PH 07/79 05/03 <br /> LAB 7.56 0.25 8.10 7.16 16 PH 05/97 05/06 <br /> SOLIDS SUSPENDED 2.00 0.00 2.00 2.00 1 MG/L 09/90 09/90 <br /> TOTAL-DISS 1161.39 505.53 2770.00 65.00 70 MG/L 03/79 05/06 <br /> TEMPERATURE FIELD 10.68 2.82 19.00 3.60 70 DEGREES C 03/79 05/03 <br />PRIMARY ARSENIC DISSOLVED -2.00 1.36 -1.00 -5.00 14 UG/L 03/80 10/86 <br /> BARIUM DISSOLVED -86.92 282.44 600.00 -300.00 13 UG/L 04!79 03/82 <br /> CADMIUM DISSOLVED -3.40 5.65 1.60 -20.00 45 UG/L 03/81 04/05 <br /> TOTAL RECOV 0.10 0.00 0.10 0.10 1 UG/L 09/90 09/90 <br /> LEAD DISSOLVED -38.68 73.78 200.00 -200.00 38 UG/L 03/81 04/05 <br /> MERCURY DISSOLVED -0.17 0.75 4.00 -2.00 47 UG/L 03/80 04/05 <br /> TOTAL RECOV -0.10 0.00 -0.10 -0.10 1 UG/L 09/90 09/90 <br />