Where vapor return piping is inside the dispenser enclosure or where it may impair the effective operation of an impact valve in the liquid pipe, a shear section shall be properly installed in the vapor return piping at the base of each dispenser. Properly installed means the shear section is mounted flush (plus/minus 3/4") with the top of the surface upon which the dispenser is mounted. Shear sections shall be tested in accordance with applicable provisions of this subchapter.
Cal. Code Regs. Tit. 19, § 1918.33
Note: Authority cited: Section 41956, Health and Safety Code. Reference: Sections 41956 and 41958, Health and Safety Code.