Which configuration can Stage I Vapor Recovery be installed in?

Stage I Vapor Recovery systems are specifically designed to capture vapors that are displaced during the transfer of fuel from a delivery truck into an underground storage tank (UST). The dual point configuration involves having both a vapor return line and a fill line connected to the storage tank.

In this setup, vapors displaced by the incoming liquid fuel are routed back to the delivery vehicle rather than being released into the atmosphere. This significantly reduces vapor emissions, contributing to environmental protection and compliance with regulations governing air quality.

The dual point configuration is particularly effective because it allows for better control and efficiency in vapor recovery during the filling process. While it’s true that other configurations exist, such as single point, complex, and inline setups, they do not provide the same level of efficiency and effectiveness in capturing vapors during fuel transfer as the dual point system does. Thus, the dual point configuration is the correct answer for Stage I Vapor Recovery installation.