What are the two main types of vapor recovery systems?

The two main types of vapor recovery systems are indeed Stage I and Stage II vapor recovery systems.

Stage I vapor recovery systems are designed to capture vapors released during the transfer of gasoline from a tanker truck into storage tanks at a facility. This prevents the release of harmful vapors into the atmosphere during the filling process, helping to reduce air pollution and improve environmental safety.

Stage II vapor recovery systems, on the other hand, capture vapors displaced during the refueling of vehicles at the pump. This means that when a vehicle's gas tank is being filled, the vapors that would otherwise escape are instead collected and returned to the underground storage tanks or processed in a manner that reduces emissions.

Understanding the function of both types of systems is crucial for effective vapor recovery practices, as they address vapor emissions at different points in the gasoline distribution cycle. This knowledge is essential for ensuring compliance with environmental regulations and for protecting air quality.