The Treatment System
Pond 6
The water from Pond 5 flows through an aerator and into the final settling pond. Exposed again to oxygen, the iron oxide precipitates out and the water leaves the pond free of metals and at a neutral pH. The water exiting this pond is clean water, the same water that enters the system at a pH of approximately 2.8 and exits now at a pH of about 6.5.
Water Quality at Vintondale Treatment System
| Location | Date | Flow (GPM) | pH | Alkalinity to pH 4.5 (mg/l as CaCO3) | Acidity to pH 8.2 (mg/l as CaCO3) | Fe (mg/l) | Mn (mg/l) | Al (mg/l) | Sulfates (mg/l) | Suspended Solids (mg/l) |
| Pond 6 Outflow | 6/15/2004 | 35 | 6.1 | 15 | 36 | 3.47 | 2.57 | < 0.50 | 593 | 12.0 |
| Pond 6 Outflow | 4/4/2005 | 280 | 6.2 | 16 | 10 | 2.45 | 2.80 | < 0.50 | 590 | 9.0 |
| Pond 6 Outflow | 1/10/2006 | 45 | 6.3 | 14 | 18 | 2.50 | 2.16 | < 0.50 | 455 | < 3.0 |
Monitoring Data from Mine No. 3 Discharge
Table prepared by Kiski-Conemaugh Stream Team
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