40 CFR § 267.1105 - What do I do if my containment building contains areas both with and without secondary containment?
For these containment buildings, you must:
(a) Design and operate each area in accordance with the requirements enumerated in §§ 267.1101 through 267.1103.
(b) Take measures to prevent the release of liquids or wet materials into areas without secondary containment.
(c) Maintain in the facility's operating log a written description of the operating procedures used to maintain the integrity of areas without secondary containment.