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COLOWYO MINE Page 1 <br />Station: NUGSC <br />Sample Range: Through 12/31/00 <br /> Std Coef Maximum Minimum Max Value Min Value # of <br /> Mean Dev Var Range Valu e Valu e Found Found Samp <br />FIELD MEASUREMENTS <br />Field pH (S. U.) 8 .16 9. 40 7 .20 11/18/97 10/30/97 60 <br />Field Temperature (deg C) 8. 0 5. 3 67 21. 9 22. 0 0. 1 07/06/98 12/18/96 99 <br />Field Conductivity (umho/cm) 1435 489 34 3012 3650 638 03/06/98 06/11/98 92 <br />LABORATORY MEASUREMENTS <br />pH (Lab) (S.U.) 8 .01 8. 50 7. 50 03/21/94 03/06/98 99 <br />Conductivity (Labl (umho /cm) 1476 330 22 2842 3600 758 03 /Ofi /98 05/27/93 99 <br />TDS (180 deg CI (mg/1) 1096 230 21 900 1490 590 11/18/94 04/27/98 35 <br />Total Suspended Soli d9 (mg/11 49 .3 129. 3 262 993. 0 994. 0 1. 0 05/27/93 10/15/92 99 <br />Phosphate as P (mg/1) <br />, 0 .032 0. 045 141 0. 196 0. 198 0. 003 05/06 J96 11f30/93 43 <br />Bicarbonate as CaC03 (mq/11 365 .49 46. 39 13 215. 00 430. 00 215. 00 11/18/94 10/08/98 43 <br />Sulfate Img/L) 970 .90 130. 89 28 570. 00 740. 00 170. 00 11/18/94 05/20/97 43 <br />Asunonia Nitrogen as N (mg/1) 0 .18 0. 67 365 3. 82 3. 84 0. 03 09/13/95 11/30/93 32 <br />Nitrate + Nitrite as N (mq/11 3 .72 1. 33 76 6. 32 6. 90 0. 58 11/18/94 - 04/27/98 43 <br />Arsenic (mg/Ll 0 .001 0 .001 65 0. 002 0. 003 0. 001 04(27/98 10/15(92 43 <br />Calcium (mg/11 118 .24 16. 41 14 73. 00 150. 00 77. 00 10/08/98 06/01/93 43 <br />Iron Img/1) 0 .888 1. 761 198 8. 530 8. 590 0. 010 05/17/99 10/15/92 46 <br />Lead (mg/1) 0 .016 0. 015 97 0. 098 0. 100 0. 003 06/26/97 07/31/00 43 <br />Magnesium (mg/11 113 .237 24. 997 22 103. 600 159. 000 55. 400 08/23/94 04/27/98 93 <br />Manganese (mg(LI 0 .053 0. 069 130 0. 288 0. 290 0. 003 05/17(99 07/31/00 41 <br />Mercury (mg/1) 0 .00019 0. 00017 92 0. 00045 0. 00050 0. 00005 04/27/98 10/15/92 43 <br />Selenium (mg/11 0 .012 0. 006 98 0. 032 0. 036 0. 004 07/31/00 06/01/93 43 <br />Sodium Img/1) 92 .95 13 .15 31 58. 10 75. 00 16. 90 08/23/94 04/27/98 43 <br />Zinc (mg/11 0 .025 0. 029 115 0. 135 0. 140 0. 005 06/01/93 11/23/92 43 <br />Below detection limit values included at 0.5 times detection limit <br />