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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 138. Hydrogen
(a) Each liquefied hydrogen system installed on consumer premises shall be inspected annually and maintained by a qualified representative of the equipment owner.
(b) The area within 25 feet of any liquefied hydrogen equipment shall be kept free of dry vegetation and combustible material.
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