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CYPRUS YAMPA~LEY COAL CORPORATION: MINE NO. 1, 2, AND ECKI1fAN PARK • 2000 ANNUAL HYDROLOGIC REPORT SUMMARY OF WATER QUALITY DATA summary of water quality dale-Ill.brw CATEGORY PARAMETER ANALYSIS TYPE AVERAGE STD. DEV. MAXIMUM MINIMUM1f UNITS COUNT BEGIN END PHYSICAL PROPERTIES TEMPERATURE FIELD 9.14 3.31 20.00 3.00 DEGREES C 261 06/79 09/00 CONDUCTIVITY FIELD 1,041.63 309.79 3,220,00 330.00 UMHOS/CM 259 06/79 09/00 LAB 1,195.54 88.85 1,540.00 1,015.00 UMHOS/CM 57 07/86 07/00 PH FIELD 7.63 0.47 8.80 6.20 PH 259 07/79 09/00 LAB 7.97 0.23 8.40 7.57 PH I7 07/86 07/00 ALXALRJITY TOTAL 438.89 37.32 512.00 220.00 MG/L 55 07/86 08/99 ACIDITY AS CAC03 3.50 4.73 10.00 0.00 MG/L 4 II/79 II/81 HARDNESS AS CAC03 186.13 73.15 660 UO 37.99 MG/L I OI 03/79 08/99 SOLIDS SUSPENDED 29.00 14.10 52.00 14.00 MG/L 12 06/79 06/91 TOTAL-DISS 752.89 84.92 1,220.00 580.00 MG/L 109 03/79 07100 CATIONS CALCIUM DISSOLVED 42.05 13.99 122.00 13.16 MG/L 109 03/79 07/00 MAGNESIUM DISSOLVED 20.63 9.63 92 00 1.23 MG/L 109 03/79 07/00 SODIUM DISSOLVED 217.61 28.99 310.00 125.00 MG/L 109 03/79 07/00 POTASSIUM DISSOLVED 471 1.20 8.70 1.74 MG/L 75 03/79 04/83 SAR NOT APPLICABLE 699 1.78 12.72 0.21 UNDEFINED 106 03/79 08/99 ANIONS BICARBONATE AS HC07 512 88 68.05 625 .)0 204.00 MG/L 106 06/79 07/00 CARBONATE AS C03 10 62 13.27 43 10 0.00 MG/L 53 06/79 07/00 HYDROXIDE AS OH 0.00 0.00 000 0.00 MG/L 20 12/94 08/99 CHLORIDE NOT APPLICABLE 11.17 7.63 43 00 L00 MG/L 46 06/79 01/87 SULFATE NOT APPLICABLE 206.06 62.24 540.00 I I1 00 MG/L 109 07/79 07/00 PRIMARY ARSENIC DISSOLVED 0.52 I.IS 4.00 0.00 UG/L 31 06/79 04/89 BARIUM DISSOLVED 136.57 294.04 1,300,00 0.00 UG/L 28 04/79 II/RI CADMIUM DISSOLVED 1.17 5.81 33.)0 0.00 UG/L 80 06/79 07/00 TOTAL RECOV 0.20 0.00 0.20 0.20 UG/L I 06/91 06/91 LEAD DISSOLVED 0.59 3.40 20,00 0.00 UG/L 68 06/79 07/00 MERCURY DISSOLVED 0.04 0.33 3.00 0.00 UG/L 85 06/79 07/00 TOTAL RECOV 0 10 0.00 0.10 0.10 UG/L I 06/91 06/91 SELENIUM DISSOLVED 0.38 2.64 24.00 0.00 UG/L 84 06/79 07/00 70TAL RECOV 0.00 0.00 0.00 0.00 UG/L I 06/91 06/91 SILVER DISSOLVED 0.00 000 0.00 0.00 UG/L 3 II/80 II/81 SECONDARY SILVER TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L I 06/91 06/91 COPPER DISSOLVED 7.58 17.86 80.00 0.00 UG/L 33 03/79 04/83 ZRJC DISSOLVED 37.16 41.35 230.00 0.00 UG/L 49 03/79 04/89 TOTAL RECOV 20.00 0.00 20.00 20.00 UG/L I 06/91 06/91 IRON DISSOLVED 110.09 441.18 4,300.00 0.00 UG/L 109 03/79 07/00 TOTAL RECOV 0.00 0.00 0.00 0.00 UGR- I 06/91 06/91 MANGANESE DISSOLVED 51.69 63.71 338.00 0.00 UG/L 108 03/79 07/00 TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L I 06/91 06/91 TARLF. 9A SITE: 09510 (SITE 009-5-10, FOIDEL CREEK ALLUVIUM)