Featured Project: Temporary USCG-Certified Marine Vapor Control System (MVCS) – California Refinery Terminal (33 CFR 154 Subpart P & EPA BACT Compliance)
A California refinery terminal needed to load high-vapor-pressure products (MVR materials like gasoline and ethanol) onto barges but lacked fixed vapor recovery equipment at the dock. Without controls, loading would violate USCG 33 CFR 154 Subpart P – Marine Vapor Control Systems, which mandates vapor collection, pressure relief valves (PRVs), and >98% destruction efficiency for VOCs/HAPs during marine transfer operations, risking shutdowns and lost revenue. Envent’s temporary MVCS unlocked safe, compliant loading at 7,500 BBL/hr.
The Challenge: High-RVP Loading Without Fixed Infrastructure
- No dockside vapor recovery for MVR products (RVP >10 psi)
- Risk of VOC releases triggering EPA BACT violations and SCAQMD Rule 1149 for storage/transfer emissions
- USCG requirements for safe distances, detonation arrestors, and third-party certification
- Potential millions in lost throughput without rapid solution
Envent’s Turnkey MVCS Solution: Rapid Deployment & Certification
Envent engineered and installed a fully USCG-certified system in days, coordinating with site teams and regulators:
| Component | Role & Compliance |
|---|---|
| EMECS Mobile Thermal Oxidizer | >99.9% DRE of MVR vapors, exceeding EPA BACT |
| Envent Dock Safety Unit (EDSU) | PRV/VRV, detonation arrestors per 33 CFR 154.820 |
| Pipeline Sizing & Safe Distances | Custom manifold for 7,500 BBL/hr, compliant with 33 CFR 154.2101 |
| Third-Party USCG Inspection | Certification letter for terminal files |
Execution
- Full PHA, installation, testing, and commissioning with USCG oversight
- Real-time monitoring for pressure, flow, and LEL
- Seamless barge loading without interruptions
Proven Benefits: Millions in Revenue, Zero Risks
Envent’s solution transformed a compliance roadblock into a revenue driver:
| Benefit | Project Impact |
|---|---|
| Regulatory Compliance | 100% 33 CFR 154 Subpart P & EPA BACT — zero violations or shutdowns. |
| Throughput & Revenue | 7,500 BBL/hr loading — millions unlocked over years without fixed capex. |
| Operational Flexibility | Temporary setup for gasoline/ethanol/high-BTU products; easy demob. |
| Safety & Efficiency | No incidents; faster loading than pipeline alternatives. |
This project cements Envent’s leadership in marine vapor recovery.
Need USCG-Certified MVCS for Your Dock or Barge Loading? 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 West Coast-ready—explore our thermal oxidizers.
