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COLOWYO MINE <br />Station: NVGSC <br />Sample Range: Through 12/31/00 <br />Page 1 <br /> Std Coef Maximum Minimum Max Value Min Value q of <br /> Me an Dev Var Range Val ue Val ue Found Found Samp <br />FIELD MEASUREMENTS <br />Field pH (S.U.1 8 .16 9 .40 7 .20 11/18/9] 10/30/97 60 <br />Field Temperature (deg C) 6 .0 5 .3 67 21 .9 22 .0 0 .1 07/06/98 12/18/96 94 <br />Fie 1d Conductivity lumho/cm) 1935 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 07/21/94 03/06/98 99 <br />Conductivity (Lab) lumho/cm) 1476 330 22 2842 3600 758 03/Ofi/9B 05/27/93 99 <br />TDS (180 deg CI (mg/1) 1096 230 21 900 1440 590 11/18/94 04/27/98 35 <br />Total Suspended Solids (mg/11 49 .3 129. 7 262 993. 0 994. 0 1 .0 05/27/93 10/15/92 99 <br />Phosphate as P (mg/1) 0 .032 0. 045 141 0. 196 0. 198 0 .003 05/06/96 11/]0/97 43 <br />Bicarbonate as CaC03 (mg/11 365 .44 46. 79 13 215. 00 430. 00 215 .00 11/18/94 10/OB/9B 93 <br />Sulfate (mg/11 970 .90 170. 89 28 570. 00 790. 00 170. 00 11/18/99 05/20/97 93 <br />Ammonia Nitrogen as N (mg/11 0 .18 0. 67 365 1. 82 3. 84 0. 03 09/13/95 11/70/93 72 <br />Nitrate . Nitrite as N Img/11 3 .72 1. J3 36 6. 32 6. 90 0. 88 11/18/94 04/27/98 43 <br />Atsenis Img/1) 0 .001 0. 001 65 0. 002 0. 003 0. 001 09/27/98 10/15/92 43 <br />Calcium Img/11 118 .24 16. 91 19 77. 00 150. 00 77. 00 30/08/98 06/01/97 47 <br />Iron (mg/1) O .BBB 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 /2fi/97 0]/31/00 93 <br />Magnesium (mg/11 113 .237 29. 997 22 103. 600 159. 000 55. 400 08/23/94 04/27/98 43 <br />Manganese (mg/11 0 .053 0. 069 130 0. 288 0. 290 0. 003 05/17/99 07/31/00 41 <br />Mercury (mg/11 0 .00019 0. 00017 92 0. 00045 0. 00050 0. 00005 04/27/98 10/15/92 93 <br />Selenium (mg/11 0 .012 0. 006 48 0. 032 0. 076 0. 004 07/31/00 06/01/93 43 <br />Sod Sum Img/11 42 .45 13. 35 31 58. 10 75. 00 16. 90 08/23/94 09/27/98 43 <br />21nc Img/11 0 .025 0. 029 115 0. 135 0. 140 0. 005 06/01/97 11/23/92 43 <br />Be loW detection limit values included at 0.5 times detection limit <br />