Stage 1 vapor recovery testing refers to the process of evaluating the effectiveness of vapor recovery systems designed to capture vapors displaced during the transfer of fuel from a tanker truck to a storage tank at a fueling facility. This system is essential for preventing the release of volatile organic compounds (VOCs) and other harmful emissions into the atmosphere, which can contribute to air pollution and affect health.

During Stage 1 testing, various parameters are measured, including the flow rate of fuel delivered, the vapor recovery efficiency, and the pressure within the tank system. The testing ensures that the vapor recovery system meets regulatory requirements and operates effectively. Proper functioning of Stage 1 vapor recovery systems is critical for compliance with environmental regulations and standards.