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<br />COLOWYO MINE Page 1 <br />Station: LGSC <br />Sample Range: Through 12/31/00 <br /> Std Coef Maximum Minimum Max Value Min Value q of <br /> Mean Dev Var Range Val ue Valu e Found Found Samp <br />FIELD MEASUREMENTS <br />Field pH IS.U.) 7. 87 9 .30 6. 50 11/18/97 06/14/82 154 <br />Fie 1d Temperature (deg CI 9. 9 6. 2 62 25 .6 25 .0 -0. 6 07/26/82 12/10/96 200 <br />Field Conduc[1v1ty (umho/cm) 1fi 22 339 21 2088 2900 812 10(03196 05/17/99 154 <br />LABORATORY MEASUREMENTS <br />pH (Loh) (S. U.) 7. 85 8 .50 6. 10 08/19/91 05/19/92 234 <br />Conduct Svity ILabl lumho/cm) 1662 326 20 2659 2820 161 01/19/93 06/23/92 218 <br />TDS (180 deg C) (mg/11 1307 370 28 3330 4050 720 11/OB/00 05/23/95 110 <br />Total Suspended Solids Img/1) 76. 4 292. 6 383 3699 .0 3700 .0 1. 0 04/30/85 10/16/91 237 <br />Phosphate as P lmg (11 0. 041 0. 047 115 0 .348 0 .350 0. 003 02)24/86 11)30)93 88 <br />Bicarbonate as CaC03 Img/1) 386. 93 73. 87 19 499 .00 524 .00 30. 00 01/06/98 05/14/92 90 <br />Sulfate (mg/11 646. 33 16fi . 41 26 685 .00 995 .00 260. 00 12/09/89 05/20/97 90 <br />Ammonia Nitrogen as N Img/11 0. 11 0. 26 236 2 .26 2 .2fi 0. 01 12 /09 /B9 07/27/89 79 <br />NLC rate . Nitrite ae N (mg/1) 2. 86 2. 39 84 7 .99 8 .29 0. 30 12/26/85 OB/17 /92 79 <br />Arsenic (mg/1) 0. 001 0. 002 151 0 .018 0 .018 0. 001 04/07/82 09/18/86 90 <br />Calcium (mg/11 138. 25 28. 84 21 190 .00 208 .00 68. 00 12 /2B/B9 03/13/84 93 <br />Iron lag/11 0. 646 0. 670 104 4 .245 4 .270 0. 025 09/27/98 11)08100 97 <br />Lead (mg/1) 0. 017 O. O1B 107 0 .138 0 .190 0. 003 07/27/89 07/31/00 90 <br />Magnesium (mg/11 142. 163 31. 701 22 199 .900 226 .000 76. 600 12/04/89 05/20/97 94 <br />Manganese Img/11 0. 118 0. 060 51 0 .318 0 .320 0. 003 04/07(82 07/31/00 88 <br />Mercury Img/1) 0. 00019 0. 00020 107 0 .0009 5 0 .00100 0. 00005 04/07/82 02/24/86 90 <br />Selenium (mg/1) 0. 007 0. 005 69 0 .030 0 .030 0. 001 10/09/89 11/09/90 90 <br />Sodium (mg/1) 67. 81 23. 87 35 112 .30 132 .00 19. 70 10/08/98 04/17/00 92 <br />Zinc Imq/1) 0. 017 0. 026 156 0 .198 0 .200 0. 003 08/19/91 03/29/83 90 <br />Below detection limit values included at 0.5 times detection limit <br />