Under no circumstances shall any pressure vessel subject to the Boiler and Pressure Vessel Laws and these rules be buried underground or located in an inaccessible place. Where necessary to install a vessel underground, it shall be enclosed in a concrete or masonry pit with removable cover so that inspection of entire shell and heads of the vessel can be made.
Or. Admin. Code § 918-225-0510
Stat. Auth.: ORS 480.545
Stats. Implemented: ORS 480.545