Vapor collection system
Vapor collection system means any equipment located at the source, i.e., at the terminal, that is not open to the atmosphere, that is composed of piping, connections, and flow inducing devices, and that is used for containing and transporting vapors displaced during the loading of marine tank vessels to a control device or for vapor balancing. This does not include the vapor collection system that is part of any marine vessel vapor collection manifold system.
Source
40 CFR § 63.561
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Clean Air Act or in subpart A of this part.