PDFWAC 296-104-265
Installation—What are the requirements for unfired pressure vessels installed underground?
Unfired pressure vessels installed underground shall comply with the following requirements:
(1) A pit with concrete or masonry sides and floor shall enclose the underground portion of the unfired pressure vessel.
(2) Pit covers shall be removable.
(3) Clearances shall be as required by WAC 296-104-260.
[Statutory Authority: RCW 70.79.030, 70.79.040, 70.79.150, 70.79.290, 70.79.330, 70.79.350, and chapter 70.79 RCW. WSR 04-01-194, § 296-104-265, filed 12/24/03, effective 1/24/04; WSR 02-23-036, recodified as § 296-104-265, filed 11/13/02, effective 12/14/02. Statutory Authority: RCW 70.79.030 and 70.79.040. WSR 97-20-109, § 296-104-320, filed 9/30/97, effective 10/31/97; Part V, § 5, filed 3/23/60.]