- (a) Tanks not enclosed in vaults must be enclosed with a chain link fence at least 6 ft. (2m) high. The fence must be separated from the tanks by at least 10 ft (3 m) and must have a gate that is secured against unauthorized entry.
- (b) The area within the fence must be kept free of vegetation, debris and any other material that is not necessary to the proper operation of the tank and piping system.
- (c) Tanks are not required to be enclosed within a fence if the property on which the tanks are located already has a perimeter security fence.
- (d) A fence may not be required if another method effectively restricts access to the tanks.
Added at 21 Ok Reg 2079, eff 7-1-04
Amended at 23 Ok Reg 144, eff 10-6-05 (emergency)
Amended at 23 Ok Reg 2297, eff 7-1-06