You must ensure that the in-plant handling, storage, and utilization of all compressed gases in cylinders, portable tanks, rail tank-cars, or motor vehicle cargo tanks is in accordance with Compressed Gas Association Pamphlet P-1-1965.
Wash. Admin. Code § 296-24-29503
Order 73-5, § 296-24-29503, filed 5/9/73 and Order 73-4, § 296-24-29503, filed 5/7/73.