Battery · Surface Facilities
Secondary Containment
The dike or lined berm around tanks that holds a spill inside the site.
What it does
Keeps oil and produced water from reaching soil and water if a tank leaks or overflows.
Basics
| Forms | Earthen dike with liner, steel or concrete wall |
| Alberta | AER Directive 055 |
| Keep clear | Drain rainwater only after checking for oil |
Common failures
- Drain valve left open, so the containment holds nothing
Troubleshooting
- Symptom
- Sheen on water inside the berm
- Likely cause
- Small tank or piping leak
- What to check
- Find and fix the leak before draining