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 Oklahoma Administrative Code (Last Updated: March 11, 2021)
 TITLE 165. Corporation Commission
 Chapter 15. Fuel Inspection
 Subchapter 13. Labeling of Tanks and Product Lines

SECTION 165:15-13-1. General identification and color coding requirements  

Latest version.
  • (a)   All storage tanks subject to the rules of this Chapter must be marked with a tag, lettering, or other permanent marking on the fill neck and color coded on the overfill sump lids to identify the type, grade, or quality of regulated substance they contain.
    (b)   East of 99 degrees west longitude, color coded markings must be:
    (1)   Unleaded motor fuel, 91 octane or above: red.
    (2)   Unleaded motor fuel, 89 or 90 octane: blue.
    (3)   Unleaded motor fuel, 86 through 88 octane: white.
    (4)   Diesel motor fuel: yellow.
    (5)   Kerosene: brown.
    (6)   Dyed diesel: half yellow, half red.
    (7)   Unleaded 87 octane E10: white with black "X" and a black border around lid.
    (8)   Premium unleaded 91 octane E10: red with black "X" and a black border around lid.
    (9)   E15: E15 tanks must be designated "E15" in black with a black border around lid, and the colors referenced above for unleaded motor fuel, 86 through 91 octane, should be used for the lid.
    (10)   Biodiesel: bronze with yellow and black border around lid.
    (11)   E85: orange with black "X" and a black border around lid.
    (c)   West of 99 degrees west longitude, color coded markings must be:
    (1)   Unleaded motor fuel, 90 octane or above: red.
    (2)   Unleaded motor fuel, 88 or 89 octane: blue.
    (3)   Unleaded motor fuel, 86 or 87 octane: white.
    (4)   Diesel motor fuel: yellow.
    (5)   Kerosene: brown.
    (6)   Dyed diesel: half yellow, half red.
    (7)   Unleaded 87 octane E10: white with black "X" and a black border around lid.
    (8)   Premium unleaded 91 octane E10: red with black "X" and a black border around lid.
    (9)   E15: E15 tanks must be designated "E15" in black with a black border around lid, and the colors referenced above for unleaded motor fuel, 86 through 91 octane, should be used for the lid.
    (10)   Biodiesel: bronze with yellow and black border around lid.
    (11)   E85: orange with black "X" and a black border around lid.
    (d)   Vapor-recovery connections and manholes shall be marked with orange circles.
    (e)   Observation and monitoring wells shall be marked with a black triangle on a white background.
    (f)   At all facilities with more than one tank, the color coding applied to the fill cap or manhole cover shall extend beyond the edge of the cap or cover onto adjacent concrete or pavement.
    (g)   The tag labeling and color coding must be waterproofed and fuel-proofed material so that the type, grade, or quality of the motor fuel is readily visible to persons adding to or taking a sample from the line or storage tank.
[Source: Amended at 13 Ok Reg 2405, eff 7-1-96; Amended at 18 Ok Reg 1052, eff 5-11-01; Amended at 31 Ok Reg 1003, eff 9-12-14; Amended at 33 Ok Reg 594, eff 8-25-16; Amended at 35 Ok Reg 974, eff 10-1-18; Amended at 36 Ok Reg 535, eff 8-1-19; Amended at 37 Ok Reg 1121, eff 10-1-20]