SECTION 165:25-2-55.2. Vent piping requirements

(a)   Where vent pipes installed prior to July, 2003, from tanks storing gasoline are adjacent to buildings or public ways, they must be located not less than twelve feet (12') (3.6 meters) above the adjacent ground level or three feet (3') above the roof line at the highest point of attachment. Newly installed vent pipes must be five feet (5') above the roof or canopy. All vent pipes buried below ground must be a minimum of eighteen inches (18").

(b)   In order to aid in dispersion, vapors must be discharged upward. Vent outlets must be located so that flammable vapors will not accumulate to an unsafe location or trapped under eaves and shall be at least five feet (5') (1.5 meters) from building openings and fifteen feet (15') (4.5 meters from powered ventilation air intake devices).

(c)   All new or replacement underground vent piping must be non-metallic. Aboveground vent risers must be steel pipe.

(d)   Vent risers must be located or protected and anchored, to prevent damage from traffic, wind, or testing procedures.

[Source: Added at 25 Ok Reg 1867, eff 7-1-08; Amended at 32 Ok Reg 780, eff 8-27-15; Amended at 35 Ok Reg 985, eff 10-1-18; Amended at 37 Ok Reg 1128, eff 10-1-20]