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.]