Federal law requires a DOT 406 tank to be used when carrying over 119 gallons of any gasoline product. This includes aviation gas, automotive gas, etc. Below is the primary section outlining this:
A specific tank is required per CFR49 Parts 100 to
185 transportation, for the transport of gasoline in a bulk container. (Greater than 119 gallons.)
Due to the flash point of gasoline, this tank falls
into the category of Class III Fuels that is REQUIRED to be transported in a
Code DOT 406 vessel. If this tank will hold gasoline, the tank is required to
meet DOT 406 Specifications, be labeled accordingly and be annually tested per
CFR 49 requirements. Gasoline has a Flash Point of -40`F, which is lower than
the 100`F for Class III Fuels to be included in the “non-code” section of this
provision for Class III Fuels.
DOT406 Tanks meet the requirements of 49 CFR Ch. I
(10-1-07 Edition) §172.102, B1 and 49 CFR Ch. I (10-1-07Edition) §173.242,Bulk Packaging for Certain Medium Hazard Liquids
and Solids, including solids with dual hazards.
Only DOT406 specification tanks meet Federal
regulations for the transport of Gasoline over public lands or roadways.