GENERAL47887

• Permit No: M1977378
• IBM Index Class Name: General Documents
• Doc Date: 8/20/2003
• Doc Name: Consent Decree Fourth Amendment
• From: Sunnyside Gold Corp
• To: DMG
• Media Type: D
• Archive: No

Table A-1: Dissolved Zinc and Streamflow data for A-72
Raw Data: A- 72

Dat
Agency Flo
(cfs) Zinc (dis)
(uglL)
9/5/1991 WQCD 131 380
916(1991 WQCD 185 370
9/7/1991 WQCD 261 310
9/9/1991 WQCD 269 260
9!10/1991 WQCD 263 27D
6/23/1992 WQCD 965 240
6/24/1992 WQCD 955 290
6/25/199 WQCD 905 260
10/14!199 WQCD 80 480
1 0/1 511 9 9 WQCD 78 510
7/20/1993 WQCD 434 290
7/21/1993 WQCD 434 260
11/10/1993 USGS 86 520
5/16/1994 654 510
5/18/199 USGS 603 500
6/2/199 USGS 1370 300
7/26/1994 USGS 159 360
1/18/1995 WQCD 72 680
2/7/1995 SGC 90 600
4/12/1995 USGS 127 790
9/6/1995 BOR 239 360
11/29/1995 BOR nd 365
11/29/1995 USGS 76 490
1/16/1996 WQCD 65 540
4/9/1996 BOR 167 950
4/9/1996 USGS 167 830
4!9/1996 WQCD nd 780
4/9/1996 USGS 167 830
5/22/1996 USGS 1370 270
nd = no data
Baseline Data set: A-72

Date
Rise Flo
(cfs) Zinc (dis)
(uglL)
9/5/1991 0 192 353

9/9/1991 0 266 265

6/24/1992 0 942 263

10/14!1992 0 79 495

7/20/1993 0 434 275

11/10/1993 0 86 520
5/16/1994 1 62 505

6!2!1994 1 1370 300
7/26/1994 0 159 360
1/18/1995 0 7 680
2/7/1995 0 90 600
4/1211995 1 127 790
9/6/1995 0 239 360
11/29/1995 0 7 428

1/16/1996 0 65 540
4/9/1996 1 16 848

5/22/1996 1 1370 .270

In the Upper Animas Basin this dilution phenomenon is particulazly distinct with au added
"flush" effect on the rising limb of the hydrograph. One explanation of this flush effect is that as
the snow begins to melt, additional metals are rinsed from the near surface soils adding to the
concentration in the stream flow. This flush of metals occurs as the stream flow rises, generally
starting in April and lasting through mid-June. Examination of the hydrograph (the daily flow
records) is necessary to determine when the flows begin to increase in the spring and peak in
June.
Appendix A
2
232565