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Colowyo Mine <br />Station; ~ NGSN _, <br /> Std Coef Maximum Minimum Max Yalue Min Value p of <br /> Mean Dev Var Range Velue Ve lue Found Found Semp <br />FIELD MEASUREMENTS <br />Field pH (S.U.) 7.61 0.24 3 0.80 8.00 7.20 11/30/93 05(30(90 20 <br />Field Tenpereture (deg C) 9.5 2.9 31 11.0 75.0 4.0 05/17/91 11/30/93 28 <br />Field Conductivity (umho/cm) 1935 147 8 580 2180 1600 07/19/90 06/01/93 20 <br />LABORATORY MEASUREMEN TS <br />pH (S.U.) 7.7 0.3 4 1.3 8.5 7.2 08/19/91 09/05/89 32 <br />Conductivity (umho/cm) 1977 247 13 1140 2700 1560 10/17/91 03/13/93 32 <br />TDS (180 deg C) (melt) 1580 188 12 804 1876 1072 05/30/90 03/13!93 32 <br />Phosphate as P (mg/l) 0.050 0.054 108 0.295 0.300 0.005 11/19/96 11/30/93 31 <br />Bicarbonate as CaC03 (mg/l) 450 95 21 545 557 12 11119)96 06/01/94 32 <br />Sulfate (mg/t) 813.69 114.11 14 551.00 1185.00 634.00 08/19/41 06/01!93 32 <br />Ammonia Nitrogen as N (mg/l) 0.24 ~ 0.13 56 0.49 0.54 0.05 11/19/96 03/27/90 31 <br />Nitrate * Nitrite as N (mg/l) 0.13 0.06 46 0.16 0.19 0.03 04/15/96 11/19/96 5 <br />Nitrate as N (mg/L) 0.13 0.17 133 0.72 0.73 0.01 03/13/93 03!28!91 3D <br />Nitrite as N (mgll) 0.01 0.00 0 0.00 0.01 0.01 02/20/96 02/20/96 4 <br />Arsenic (~/l) 0.002 0.001 60 0.004 0.005 0.001 08/19/92 10/05/89 32 <br />Calcium (mg/l) 169.5 24.4 14 102.0 223.0 121.0 03127)90 06/01/93 32 <br />Iron (mg/l) 0.678 0.587 87 2.090 2.110 0.020 05/14/92 11/19!90 31 <br />Leed (mg/l) 0.02 0.01 38 0.04 0.06 0.02 05/17/91 09/05/89 31 <br />Magnesium (mg/l) 166.8 24.4 15 113.0 230.0 117.0 03/27/90 10/05/89 32 <br />Manganese <br />~ (mg/t) 0.533 0.288 54 1.290 1.300 0.010 05!23195 11/19/90 32 <br />Mercury (mg/l) 0.0002 0.0001 32 0.0001 0.0002 0.0001 03/28/91 09/05/89 32 <br />Selenium (mg/I) 0.002 0.002 113 0.009 0.010 0.001 11/24/92 12/28/89 32 <br />Sodium (mg/l) 80.9 11.2 14 42.0 99.0 57.0 10!17{91 06/01/93 32 <br />Zinc (mg/l) 0.032 0.039 122 0.150 0.160 0.010 09/05(89 11114!90 32 <br />