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COLOWYO MINE Station: NUGBC Sample Range: Through 12/31/98 01/2]/99 Paqe 1 Std Coef Maximum Minimum Max Value Min Value tt of Mean Dev Var Range Val ue Val ue Found Found Samp FIELD MEASUREMENTS Field pB (B.U.) 8 .21 9 .40 7. 20 11/18/97 10/30/9] 31 Field Temperature (deg C) 8 .0 5 .4 68 21 .9 22 .0 ~ 0 .1 07/06/98 12/18/46 7d Field Conductivity lu mho/c m) 1472 457 72 2729 JJ67 638 12/19/98 06/11/98 63 LABORATORY MEASUREMENTS pH (Labl (S.UJ 8. 10 8 .50 7. 50 03/21/9a 03/06/98 79 Conductivity (Lab) lu mhc/cm) 136] 366 25 2892 3600 758 03/06/98 05/2]/93 79 TDS (180 deg C) (mg/1) 1059 226 21 900 1440 540 11/18/94 04/2]/98 26 Total Suspended Solids (mg/1) 50. 0 124. 8 260 993 .0 994 .0 1. 0 OB/27j93 10/15/92 79 Phosphate as P (mg/11 0. 029 0. 097 161 0. 196 0 .198 0. 003 05/06/96 11/30/93 39 Bicarbonate as CaCO3 (mg/11 765. 29 48. 69 13 215. 00 930. 00 215. 00 11/18/94 10/08/90 35 Sul Eace Img/1) 968. 17 137. 82 29 5]0. 00 740 .00 170. 00 11/18/94 05/20/97 35 Ammonia Nitrogen as N (mg/11 0. 24 0. 7] 326 3. 82 3. 89 0. 03 09/13/95 11/30/93 24 Nitrate . Nitrite as N (mg/11 1. 55 1. 29 36 6. 32 6. 90 D. SB 11/18/94 04/27/98 35 Arsenic (mg/11 0. 001 0. 001 67 0. 002 0. 003 0. 001 04/27/98 10/15/92 35 Calcium (mg/1) 119. 77 15. 36 13 73. 00 150. 00 7], 00 10/08/90 06/01/93 35 Iron Img/1) O. B38 1. 979 176 6. 790 6. 350 0. 010 05/23/95 10/15/92 36 Lead (mg/11 0. 01] 0. 016 96 0. 090 0. 100 0. 010 06/26/97 10/15/92 36 Magnesium (mg/l) 111. 634 25. 058 22 103. 600 159. 000 55. 400 08/27/94 09/27/98 75 Manganese Img/11 0. 059 0. 061 113 0. 221 0. 230 0. 009 05/23/95 12/05/95 39 Mercury (mg/11 0. 0001] 0. 00012 91 0. 00095 0. 00050 0. 00005 04/27/98 10715792 35 Selenium (mg/1) 0. 011 0. 004 35 0. 016 0. 020 0. 009 10/15/92 06/01/9] 35 Sodium (mg/11 92. 88 13 . 0A 31 58. 10 ]5. 00 16. 90 08/2]/99 04/27/98 JS Zcnc img/1) 0. 021 0. 025 108 0. 135 0. 140 0. 005 06/01/9] 11/23/92 35 Below detection limit values included at 0.5 times detection limit