California ICC UST Service Technician Practice Exam

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What system is used for exchanging gas vapors in a storage tank and product in a fuel delivery truck?

Stage 2 vapor recovery
Stage 1 vapor recovery
Vapor balance system
Gasoline vapor management system

The correct answer is: Stage 1 vapor recovery

The correct answer is Stage 1 vapor recovery, which is designed specifically to capture and control vapors that are displaced from a storage tank during the filling process from a fuel delivery truck. When the tank is filled with fuel, the vapor space above the liquid is reduced, causing vapors to be expelled. Stage 1 vapor recovery systems are critical for minimizing the release of volatile organic compounds (VOCs) into the atmosphere, thereby reducing air pollution and complying with environmental regulations. The system typically involves a combination of hoses and fittings that transfer the displaced vapors back to the delivery truck, where they can be condensed and reused. This not only prevents vapors from escaping into the atmosphere but also boosts the efficiency of the refueling process by ensuring that the vapors do not adversely affect the operations. Understanding the functions and regulations surrounding vapor recovery systems is essential for anyone working in the underground storage tank (UST) industry, especially those involved in the design and maintenance of these systems to ensure compliance with environmental standards and safety protocols.