What does vapor recovery in UST operations primarily aim to prevent?

Vapor recovery in underground storage tank (UST) operations is primarily designed to prevent emissions of vapors during refueling. When a vehicle's fuel tank is filled, the vapors that are displaced by the incoming liquid fuel can be released into the environment, contributing to air pollution and possible health hazards. Vapor recovery systems capture these vapors and either return them to the UST or process them for safe release, significantly minimizing the emissions that would occur during this process.

This prevention is crucial not only for compliance with environmental regulations but also for safeguarding community health by reducing volatile organic compounds (VOCs) that contribute to smog and other air quality issues. By focusing on vapor recovery, UST operations help ensure that the refueling process is as clean and efficient as possible, aligning with environmental protection goals.