Featured Project: Temporary Marine Vapor Control System (MVCS) for Pipeline Maintenance – Mid-West Refinery (USCG 33 CFR 154 Subpart E Compliance)
A Mid-West refinery needed to take a refined product pipeline out of service for internal maintenance without disrupting shipments or violating emissions rules. Direct venting would trigger odor complaints and exceed permit limits, while flaring was not viable.
Envent’s pre-certified MVCS provided a temporary, portable solution for barge loading, ensuring zero operational downtime.
The Challenge: Pipeline Outage Without Production Loss
- Planned internal pipeline maintenance required shutdown
- Continued refined product shipments essential to avoid $3M+ lost revenue
- Vapor emissions and odors a major concern near waterways
- Must comply with USCG 33 CFR 154 Subpart E (Marine Vapor Control Systems) and EPA BACT for >98% VOC/HAP destruction
- Flexibility for barge-to-barge transfers to maintain market access
Envent’s Turnkey MVCS Solution: Dock-to-Dock Barge Loading
Envent deployed a fully USCG pre-certified system within days, enabling safe loading from the North Dock and offloading at the South Dock.
Key Components:
- Dock Safety Unit (DSU) with integrated vapor scrubbers for safe handling of high-BTU vapors
- EMECS Mobile Emission Control System for >99.9% destruction efficiency (DRE), exceeding EPA BACT guidelines
- Manifolding and safety interlocks for seamless integration with dock operations
- Real-time monitoring for VOCs, H2S, LEL, and flow to ensure Rule 1149/Chapter 115 compliance
The system was rapidly tested, operated for the full outage duration, and demobilized with zero infrastructure impact. Explore Envent’s marine vapor recovery services.
Proven Benefits: $3M Saved, Zero Disruptions
Envent’s solution turned a potential crisis into seamless operations:
| Benefit | Project Impact |
|---|---|
| Regulatory Compliance | 100% adherence to USCG Subpart E & EPA BACT — zero emissions violations or fines. |
| Operational Continuity | Maintained full shipments via barge — avoided $3M+ in lost opportunity costs. |
| Odor & Emission Control | >99.9% DRE prevented any detectable odors or fugitive releases. |
| Flexibility | Retained 5-year certified DSU/MVCS for future emergencies. |
| Efficiency | Rapid deployment minimized downtime; no permanent modifications needed. |
This project highlights Envent’s expertise in flareless turnarounds and regulatory-compliant vapor solutions.
Need USCG-Certified MVCS for Your Pipeline or Dock Outage? Get a Free 33 CFR 154 Review & Quote Contact Envent’s engineers at 888-997-9465 or email [email protected] for a no-obligation assessment. We’re ready to deploy—explore our thermal oxidizers.
