TABLE 8. MEAN CONCENTRATIONS FOR COMMON AND TRACE CONSTITUENTS FOR SAMPLES OF DECANT WATER OBTAINED FROM
TWIN BUTTES AND SIERRITA TAILINGS IMPOUNDMENTS PIMA COUNTY, ARIZONA
�SELECTED |
TWIN BUTTES |
SIERRITA |
�PARAMETERSa |
OXIDE TAlLINGSb |
TAILINGSc |
�pH (units) |
2 |
���� 10.27 |
�CONDUCTANCEd |
18,000 |
3,300 |
�Total Dissolved Solids |
30, 000 |
3,390 |
�Calcium |
400 |
655 |
�Magnesium |
����� 2,800 |
�������� 0.63 |
�Sodium |
150 |
� 258 |
�Potassium |
100 |
������ 65 |
�Sulfate |
23,000 |
� 1,910 |
�Iron |
750 |
�� 0.08 |
�Manganese |
600 |
�� 0.03 |
�Copper |
200 |
�� 0.05 |
�Zinc |
400 |
�� 0.04 |
�Arsenic |
0.2 |
ND |
�Cadmium |
2 |
ND |
�Chromium |
5 |
ND |
�Lead |
1.2 |
ND |
�Beryllium |
0.3 |
ND |
�Nickel |
2 |
ND |
�Fluoride |
40 |
�������� 1.3 |
�Cobalt |
2 |
ND |
�Cyanide |
0.01 |
--- |
�Molybdenum |
0.2 |
�������� 4.9 |
a Values in milligrams per liter unless noted otherwise.
b From Steffen Robertson and Kirsten Inc., 1985b.
c Average of results for samples obtained in August and September, 1988, from tailings slurry decant water and from the reclaim pond (Table 11, Montgomery & Associates, 1989).
d umhos/cm = micromhos per centimeter
--- = Not analyzed" ND = Not detected
546\07\090794.RPT\COMDEC.TAB\09-06-94
ERROL L. MONTGOMERY & ASSOCIATES, INC. TUCSON, ARIZONA