Which federal agency is responsible for setting standards for vapor recovery systems in the United States?

The Environmental Protection Agency (EPA) is the federal agency responsible for establishing standards for vapor recovery systems in the United States. This responsibility falls within the EPA's broader mission to protect human health and the environment, particularly concerning air quality and pollution control.

Vapor recovery systems are designed to capture vapors that can be released during fuel storage and dispensing, significantly reducing environmental contamination and contributing to cleaner air. The EPA develops regulations and guidelines aiming to minimize volatile organic compound (VOC) emissions from these systems. The EPA's authority is derived from various environmental laws, including the Clean Air Act, which mandates the implementation of measures to maintain and improve air quality.

In contrast, other agencies like OSHA primarily focus on workplace safety and health; the FAA oversees civil aviation safety and regulations; and the DOT manages transportation policies and infrastructure. None of these agencies are specifically tasked with setting standards for vapor recovery systems, which underlines the EPA's unique role in this area.