Advanced Mitigation, Leak Control and Repair Techniques
Advanced Mitigation, Leak Control and Repair Techniques
Specialist-level mitigation includes offensive leak control, overpacking, transfer, and repair. The exam tests method selection and the conditions that make a technique unsafe.
Core rules
- Identify container type, product phase, pressure, temperature, leak size, and access before choosing a method.
- Common techniques: plugging, patching, wrapping, overpacking, dome clamps, and product transfer.
- Use approved kits for the container and product. Chlorine cylinders, for example, require the appropriate emergency kit and trained personnel.
- Reduce pressure or temperature only when the procedure is approved for that container.
- Ground and bond flammable containers before transfer. Use non-sparking tools.
- Entry and repair require PPE, monitoring, backup, and a retreat plan. If the repair fails, the team must be able to withdraw.
Worked example
A one-ton chlorine cylinder is leaking at the valve. The team establishes isolation and upwind command, dons appropriate PPE with SCBA, monitors chlorine, and assembles the approved chlorine emergency kit. They do not attempt to tighten a damaged valve with ordinary tools. The repair is made only if the cylinder is stable and the team has a backup and decon plan. If the leak cannot be controlled, the option is confinement and evacuation, not heroic entry.
Traps
- Using a kit on the wrong container or product.
- Patching a leak that is under high pressure without pressure reduction.
- Forgetting grounding and bonding.
- No retreat plan or backup team.
- Overpacking a container that is incompatible or too damaged.