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COLOWYO MINE Page 1 <br />Station: LGSC <br />Sample Range: ThLOUgh 12/31/01 <br /> Std Coef Maximum Minimum Max Value Min Value # of <br /> Mean - Dev Var Range Val ue Value Found Found Samp <br />PIELD MEASUREMENTS <br />Field pH (S.U.) 7 .88 9 .30 6 .50 11/10/97 06/14/02 166 <br />Field Temperature (deg C) 9 .7 6 .1 63 25 .6 25 .0 -0 .6 07/26/82 12/18/96 212 <br />Field Conductivity (umho/cm) 1602 341 21 2088 2900 812 10/03/96 05/17/99 166 <br />LABORATORY MEASUREMENTS <br />pH (Lab) (S,U.) 7 .85 8 .50 6 .10 08/19/91 05/19/92 247 <br />Conductivity (Lab) (u mho/cm) 1662 321 19 2659 2820 161 01/19/93 06/23/92 231 <br />TDS (100 deg C) (mg/1) 1313 365 28 3330 4050 720 11/OB/00 05/23/95 115 <br />Total Suspended Solids lmg/1) 73 .4 285 .2 389 3699 .0 3700 .0 1 .0 04/30/85 10/16/91 246 <br />Phosphate as P (mg/1) 0 .040 0 .046 115 0 .348 0 .350 0 .003 02/24/86 11/30/93 93 <br />bicarbonate as CaC03 (mg/1) 389 .46 73 .16 19 494 .00 524 .00 30 .00 01/06/98 05/19/92 95 <br />Sulfate (mg/3) 640 .21 163 .19 25 685 .00 945 .00 260 .00 12/04/89 05/20/97 95 <br />Ammonia Nitrogen as N (mg/1) 0 .11 0 .25 228 2 .26 2 .26 0 .01 12/09/89 07/27/89 04 <br />Nitrate + Nitrite as N (mg/1) 2 .79 2 .34 89 7 .99 8 .29 0 .30 12/2fi /85 08/17/92 BO <br />Arsenic (mg/1) 0 .001 0 .002 397 0 .018 0 .018 0 .001 09/07/82 09/18/85 95 <br />Calcium (mg/1) 138 .74 27 .25 20 140 .00 208 .00 68 .00 12/28/89 03/13/84 105 <br />Iron (mg/1) 0 .632 0 .657 104 4 .245 4 .270 0 .025 04/27/98 11/OB/00 102 <br />Lead (mg/11 0 .019 D .022 115 0 .140 0 .140 0 .001 07/27/89 11/OS/O1 95 <br />Magnesium (mg/1) 142 ,758 30 .207 21 149 .400 226 .000 76 .600 12/04/89 05/20/97 106 <br />Manganese (mg/11 0 ,118 0 .059 50 0 .318 0 .320 0 .003 04/07/82 07/31/00 93 <br />Mercury (mg/11 0 .00019 0 .00020 105 0 .0009 5 0 .00100 0 .00005 09/07/02 02/24/06 95 <br />Selenium (mg/1I 0 .007 0 .005 69 0 .030 0 .030 0 .001 10/04/89 11/09/90 95 <br />Sodium (mg/1) 60 .53 23 .74 35 112. 30 132. 00 19. 70 10/08/98 04/17/00 97 <br />Zinc lmg/1) 0 .017 0 .026 159 0 .198 0 .200 0 .003 08/19/91 03/29/03 95 <br />Below detection limit values included at 0.5 times detection limit <br /> <br />