Which document outlines the specifications and performance requirements for vapor recovery systems?

The correct choice is the National Fire Protection Association (NFPA) standards because these standards specifically address safety measures related to the handling and storage of flammable liquids, including requirements for vapor recovery systems. The NFPA has established guidelines that define the performance characteristics, installation practices, and safety protocols to minimize fire and explosion hazards associated with the vapor recovery process.

While OSHA guidelines focus more broadly on occupational safety and health standards in various workplace environments, they do not specifically outline the technical specifications for vapor recovery systems. The Environmental Protection Agency (EPA) directives mainly focus on environmental regulations and may include emissions standards, but they do not provide detailed technical specifications for system performance like the NFPA. State building codes can vary widely and may not specifically address vapor recovery systems unless they reference relevant national standards, making them less comprehensive in this context than the dedicated standards established by the NFPA.