REP19956

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/2/1999
• Doc Name: 1998 ARR & AHR Exhibit 4 ALLUVIAL WELLS GROUND WATER INFORMATION
• Permit Index Doc Type: ANNUAL RECLAMATION REPORT
• Media Type: D
• Archive: No

COLOUYO MINE 01/27/ 99 page 1
$LdClOn: NGSu
Sample Range: Throu gh 12/31/98
5 Cd Coef Max lmum Min imum Max Value Min Value p of
Mean Dev Var Ra nge Va lue Va 1ue Found Found Samp
'~ FIELD MEAEUR EMENiE
Field pH (S.U.) ] .59 0 .]0 7 .20 11/18/9] 05/30/90 29
Field Temperature (deg C) 9 .4 3 .2 39 14 .0 19 .0 4 .0 07/06/99 11/]0/93 33
Field Conductivity (umho/cml 1960 218 L2 736 2200 1464 02/19/90 10/08/98 2]
LABORATORY MEASUREMENTS
pH (Lab! (S.U.) 7 .67 8. 50 ] ,20 08/19/91 09/05/89 a0
Conductivity (La bl (umho/cml 1930 297 15 1550 2700 1150 10/17/91 09/2]/90 90
TOS (180 deg C) (mg/11 1531 252 16 1096 1876 780 05/30/90 04/2]/99 40
Phosphate as P (mg/1) 0 .045 0. 049 111 0 .298 0. 300 0 .003 11/19/96 11/30/93 39
Bicarbona to as CaC03 (mg/11 956. 10 93. 11 20 5]0 .00 590. 00 12. 00 00/14/9] 06/01/99 90
Sulfate (mg/11 762. 35 169. 50 22 998 .00 1185. 00 207. 00 08/19/91 04 /27!90 40
Ammons Nitrogen as N (mg/1) 0. 22 0. 13 fil 0 .52 0 59 0. 03 11/19/96 03/27/90 J9
Nitrate . NitriCe as N (mg/11 0. 17 0. 39 225 1 .61 1. 61 0. 01 04/27/98 09/05/09 19
Nitrate as N (mgJll 0. 15 0. 20 132 0 .72 0. 73 0. 01 03/13/93 09/05/09 35
NiC r1Le as N (mg/1) 0. 01 0. 00 0 0 .00 0. 01 0. 01 09/05/09 09/05/99 27
Arsenic Img/11 0. 002 0. 001 66 0 .005 0. 005 0. 001 11(24/92 10/05/99 40
Calcium (mg/1) 163. 95 30. 36 19 130 .30 223. 00 92. 70 03/27/90 10/00/98 40
Iron Img/11 0. 709 0. 769 108 3 .985 3. 990 0. 005 04/2]/98 11/18/97 39
Lead Imgjll 0. 016 0. 011 ]0 0 .050 0. 060 0. 010 05/17/91 09/05/99 40
Magnesium (mg/1) 160. 56 10. 95 19 159 .00 270. 00 ]6. 00 03/27/90 04/27/90 40
Manganese Img/1) 0. 522 0. 305 58 1 .298 1. 300 0. 003 05/23195 11(10]97 40
Mercury (mg/1I 0. 00013 0. 00012 91 0 .0009 5 0. 00050 0. 00005 04/2]/99 09/05/89 40
Selenium (mg/1) 0. 001 0. 002 142 0. 010 0. 010 0. 001 11/29/92 12/20/09 ad
Sodium Img/11 91. 79 20. 13 25 190. 30 172. 00 ]1. 70 11/19/9] 09/2]/98 40
Z1nc (mg/1) 0. 026 0. 03] 194 0. 155 0. 160 0. 005 09/05/89 11/19/90 i0
E210M deCeCC10R 11m1C VdlU25 1RC1 LLded aC 0. $ C1mES deC CCClOn 11m1 C.