40 CFR § 267.1107
Can a containment building itself be considered secondary containment?
June 9, 2020
Containment buildings can serve as secondary containment systems for tanks placed within the building under certain conditions.
(a) A containment building can serve as an external liner system for a tank, provided it meets the requirements of §267.196(a).
(b) The containment building must also meet the requirements of §267.195(a), (b)(1) and (2) to be considered an acceptable secondary containment system for a tank.