During a pollution incident at a UK automotive manufacturing facility, the site activated its existing pollution containment system — a penstock valve.
The response exposed two critical issues:
- The system took over 20 minutes to fully close
- Even after closure, flow off-site continued
This meant the containment system failed to isolate the drainage network during a live incident.
In an emergency, response time and sealing performance are critical — we can assess how your current system would perform under real conditions.
The Challenge
Sandfield Penstock Solutions were asked to:
- Review the operation of the existing system
- Identify why isolation was not achieved
- Deliver a solution capable of rapid, reliable containment
Initial findings highlighted common issues associated with traditional penstock-based containment:
- Slow actuation times
- Dependence on manual or delayed activation
- Inconsistent sealing under real-world conditions
Engineering Solution
We recommended replacing the existing system with a stand-alone ToggleBlok® automated containment system, integrated with the site’s security office for rapid activation.
Key improvements included:
- Automated response (no reliance on manual intervention)
- Rapid closure mechanism
- Full bore sealing capability
- Independent operation (stand-alone system)
Systems like this can be integrated with existing infrastructure and alarm systems — contact us to discuss options for your site.
Performance Validation
The site repeated a controlled spill scenario using the new system.
Results:
- Full isolation achieved in less than 20 seconds
- Complete stop to off-site flow
- Reliable, repeatable system performance
Key Insight
A containment system that reacts too slowly — or fails to seal — is not a containment system.
In emergency scenarios:
- Minutes matter
- Delays increase environmental impact
- Incomplete sealing results in regulatory exposure
Comparison: Legacy vs Engineered Response
| Criteria | Penstock System | ToggleBlok® System |
| Response Time | ~20 minutes | < 20 seconds |
| Activation | Manual / delayed | Automated / remote |
| Sealing Performance | Inconsistent | Reliable |
| Outcome | Flow not stopped | Full isolation achieved |
Modern Containment Approach
Today, effective systems must deliver:
- Immediate response
- Reliable sealing under pressure
- Integration with alarms and controls
- Alignment with CIRIA C736 guidance
If you are unsure how quickly your system would respond — or whether it would fully contain a spill — we can test and evaluate your current setup.
Conclusion
This case demonstrates the difference between:
- Systems designed for flow control
- Systems engineered for emergency containment
The right system ensures:
- Rapid isolation
- Environmental protection
- Regulatory compliance
Discuss Your Site
If you are:
- Relying on penstock-based containment
- Reviewing emergency response procedures
- Looking to improve compliance and reliability
We can support with:
- System performance reviews
- Retrofit solutions
- Full containment design
Want to improve Emergency Response Performance?
If you are unsure how quickly your system would respond — or whether it would fully contain a spill — we can test and evaluate your current setup.
