What does Stage II vapor recovery focus on?

• A. Capturing vapors released during the production of fuel
• B. Capturing vapors emitted during refueling of vehicles
• C. Monitoring underground storage tanks
• D. Controlling emissions from storage facilities

Answer: (B)

Stage II vapor recovery systems are specifically designed to capture the fuel vapors that are released during the refueling of vehicles. When a vehicle's fuel tank is filled, the vapor space above the liquid fuel is displaced by the incoming fuel, which can generate emissions that contribute to air pollution. Stage II systems utilize a combination of hardware and engineering practices to recover these vapors before they escape into the atmosphere, effectively minimizing harmful emissions.

This focus on collecting vapors at the point of fuel transfer is essential for reducing smog-forming pollutants and improving air quality. By being strategically placed at gas stations, these systems ensure that the vapors are directed back into the storage tanks or put to further use, rather than allowing them to vent freely into the environment. Thus, the design and function of Stage II vapor recovery systems play a crucial role in facilitating cleaner air in areas with high vehicular traffic.