Featured Project: Emergency Gasoline Tank Degassing at Port of Brownsville – API 653 Inspection
A midstream terminal at the Port of Brownsville was preparing a large high-RVP gasoline tank for API 653 internal inspection. The tank was believed to be empty after pipeline transfer — until the cleaning contractor discovered more than one foot of liquid gasoline pooled at the bottom near the sump and water draws.
This surprise residual product created immediate vapor hazards, delayed the schedule, and threatened TCEQ Title V and RG-622 compliance.
The Challenge
- Unexpected 1+ ft of high-RVP gasoline in “empty” tank
- Extremely rich, high-BTU vapors (>30,000 BTU/scf)
- Must reduce to <10% LEL for safe cleaning & inspection
- 24/7 operation required — no delays allowed
- Full compliance with TCEQ Title V, RG-622, and Port of Brownsville air permits
Envent’s 24/7 Emergency Response
Envent mobilized immediately and provided continuous vapor control for the entire cleaning & degassing operation:
| Equipment & Service | Role |
|---|---|
| EMTOS Mobile Thermal Oxidizers | >99.9% DRE of gasoline vapors, high-BTU capable |
| Vapor Scrubbers | Surge & polishing control during peak loads |
| 24/7 Envent Operators + Real-Time Monitoring | Continuous LEL, flow, and pressure management |
| Direct Tie-Ins to Tank Vents & Roof Legs | 100% vapor capture — no atmospheric release |
Performance
- Maintained <10% LEL at all times
- Handled extreme vapor spikes without breakthrough
- Zero odors, zero complaints, zero visible emissions
Proven Results – Ahead of Schedule, Zero Incidents
| Benefit | Delivered Outcome |
|---|---|
| Safety | Zero incidents despite rich gasoline vapors |
| Schedule | Completed ahead of original timeline |
| Compliance | 100% TCEQ Title V, RG-622, and Port of Brownsville compliant |
| Collaboration | Seamless coordination with cleaning contractor & terminal |
| Reliability | 24/7 coverage — no downtime, no delays |
This project reinforces why 90% of Texas gasoline tank degassing is now performed by Envent.
Unexpected product in your tank? Need emergency degassing at Brownsville, Houston, or Corpus Christi? Get your 24/7 Gasoline Tank Degassing Response Plan now. Call Envent’s Gulf Coast Team at 888-997-9465 or email [email protected] — we’re on call when surprises happen.
