UST Program - Local Guidance (LG) 107

September 7, 1990

To: Local Agencies

Liquified petroleum gas is defined in Section 380 of the Vehicle Code as propane, n-butane, isobutane, butylene (including isomers), or mixtures composed predominantly of flammable gases having a vapor pressure in excess of 40 psia at 100 degrees Fahrenheit.  LPG is a fire hazard, but not a health hazard, and is not regulated under the underground storage tank law for the following reasons: 13 LPG does not meet the definition of hazardous substance contained in Section 25281(g) of the Health and Safety Code; and 2) LPG is not classified as a hazardous waste according to Article 11, Chapter 30, Division 4 of Title 22, (Criteria for Identification of Hazardous and Extremely Hazardous Wastes) because it is not a waste.

Even though underground storage tanks containing LPG are not regulated according to the State UST law, local agencies may regulate them pursuant to Section 25299.2 of the Health and Safety Code.

If you have any questions, contact us.

Sincerely,

[Original signed by:]

Mike McDonald, Manager
Underground Storage Tank Program