- (a) Fill pipes that enter the top of a tank must have drop tubes installed and terminate within 6 inches (6", or 15 cm) of the bottom of the tank.
- (b) Fill pipes should be installed or arranged so that vibration is minimized.
- (c) Each fill pipe must be labeled by a permanent marking to identify the product stored. The marking must be maintained in legible condition throughout the life of the tank installation. Color coding of the tank fill riser lids set forth in OAC 165:15-13-1 must also be used.
Added at 21 Ok Reg 2036, eff 7-1-04
Amended at 22 Ok Reg 1730, eff 7-1-05
Amended at 25 Ok Reg 1867, eff 7-1-08
Amended at 32 Ok Reg 780, eff 8-27-15
Amended at 36 Ok Reg 551, eff 8-1-19