Challenge  

A tank farm located in Texas needs to comply with TCEQ environmental regulations under 30 TAC Chapter 115 (Subchapter F, Division 3) now require that external vents on a Light Aromatic Distillate petroleum storage tank—containing Volatile Organic Compounds (VOCs) with true vapor pressure ≥ 0.5 psia—be sealed and degassed through a vapor‑tight recirculation system routed to an active control device, such as a thermal oxidizer, rather than relying on passive venting. Passive floating‑roof configurations no longer provide sufficient emissions control to meet these updated standards, which demand ≥ 90% control efficiency and a maximum outlet concentration of approximately 34,000 ppmv. The new rules also mandate regular inspections, continuous monitoring, performance testing, and comprehensive recordkeeping. To ensure zero emissions, Envent provided an engineered solution to this vapor control problem 

Solution  

Envent’s engineering team designed a system to control the vapors using a mobile tank degassing unit to perform vapor control. 

 

Benefit  

The tank farm customer was able to cost effectively comply with Compliance with TCEQ regulations under 30 TAC Chapter 115 (Subchapter F, Division 3): degassing vapor control systems ensures emissions do not escape into the surrounding environment.  The benefit is compliance and improvement of health, safety and the environment.