Storage vessel

Storage vessel means each tank, reservoir, or container used for the storage of petroleum liquids, but does not include:
(1) Pressure vessels which are designed to operate in excess of 204.9 kPa (15 psig) without emissions to the atmosphere except under emergency conditions.
(2) Subsurface caverns or porous rock reservoirs, or
(3) Underground tanks if the total volume of petroleum liquids added to and taken from a tank annually does not exceed twice the volume of the tank.

Source

40 CFR § 60.111a

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Scoping language

In addition to the terms and their definitions listed in the Act and subpart A of this part the following definitions apply in this subpart:

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