REP29502

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/12/2001
• Doc Name: 2000 ARR & AHR EXHIBIT 3 ALLUVIAL WELLS GROUND WATER INFORMATION
• Permit Index Doc Type: Annual Reclamation Report
• Media Type: D
• Archive: No

COLOWYO MINE
Station: NGSW
Sample Range: Through 12/31/00
Page 1
Std CoeE Maximum Minimum Max Value Min Value # of
Mean Dev Var Range Value Value FOUnd FoLLnd Samp
FIELD MEASUREMENTS
Field pH (S.U.) 7. 59 8 .70 7 .18 11/18/9] 10/13/99 35
Field Temperature (deg C) 9. 6 3. 1 33 14 .0 18 .0 4 .0 07/06/98 11/30/93 40
Field Conductivity lumho/cm) 1]89 269 15 llb3 2200 1037 D2j19j98 05/17/99 34
LABORATORY MEASUREMENTS
pH (Lab) (S .U.) 7. 59 B .SO 6 .80 08(19(91 10(03/00 47
Conductivity (Lab) (umho/cm) 1888 301 16 1550 2700 1150 10/17/91 04/27/98 47
TDS (180 deg C) (mg/1) 1495 263 18 1096 1876 ]BO 05/30/90 04/27/98 47
Phosphate as P (mg/1) 0. 044 0. 047 106 0 .298 0. 300 0 .003 11/19/96 11/30/93 46
Bicarbonate as CaC03 (mg/1)
~ 454. 70 86. 30 19 578 .00 590 .00 12 .00 08/14/97 06/01/94 97
Sulfate (mg/1) 72]. 51 184. 20 25 898 .00 1185 .00 287 .00 08/19/91 04/27/98 47
Ammonia Nitrogen ae N (mg/11 0. 21 0. 14 67 0 .52 0 .54 0 .03 11/19/96 03/27/90 46
Nitrate + Nitrite as N (mg/1) 0. 15 0. 33 225 1 .61 1 .61 0 .01 04/27/98 09/05/09 26
Nitrate as N Img/1) 0. 15 0. 20 132 0 .72 0 .73 0 .01 03/13/93 09/05/89 35
Nitrite as N (mg/1) 0. 01 0. 00 0 0 .00 0 .01 0 .01 09/05/89 09/05/89 27
Arsenic (mg/1) 0. 002 0. 001 59 0 .005 0 .005 0 .001 11/29/92 10/OS/89 97
Calcium (mg/1) 158. 02 32. 63 21 130 .30 223 .00 92 .70 03/27/90 10/08/98 47
Iron lmg/1) 0. 619 0. 742 120 3 .985 3 .990 0 .005 09/27/98 11/18/97 46
Lead (mg(1) 0. 015 0. 010 69 0 .050 0 .060 0 .010 05/17/91 04(05(89 47
Magnesium (mg/1) 155. 51 32. 44 21 154 .00 230 .00 76 .00 03/27/90 04/27/98 47
Manganese (mg/1) 0. 494 0. 312 63 1 .298 1 .300 0 .003 05/23/95 11/18/97 47
Mercury (mg/1) 0. 00018 0. 00017 94 0 .0004 5 0 .00050 0 .00005 04/2]/98 09/05/89 4]
Selenium (mg/11 0 .002 0. 002 120 0 .010 0 .010 0 .001 11/24/92 12/28/89 47
Sodium (mg/1) 81. 03 19. 08 24 140 .30 172 .00 31 .70 11/18/97 04/27/98 47
Zinc (mg/1) 0. 023 0. 035 154 0 .155 0 .160 0 .005 09/05/89 11/19/90 47
Below detection limit values included at 0.5 times detection limit