Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.56 - UNDERGROUND STORAGE TANKS PETROLEUM AND CHEMICAL SUBSTANCES
Subchapter 17.56.3 - General Operating Requirements
Rule 17.56.303 - COMPATIBILITY

(1) Owners and operators shall use an UST system made of or lined with materials that are compatible with the substance stored in the UST system. Owners and operators storing alcohol blends shall use American Petroleum Institute Publication 1626, "Storing and Handling Ethanol and Gasoline-Ethanol Blends at Distribution Terminals and Filling Stations to comply with the requirements of this rule.

(2) The department adopts and incorporates by reference the version in effect on July 1, 2018, of American Petroleum Institute Publication 1626, "Storing and Handling Ethanol and Gasoline-Ethanol Blends at Distribution Terminals and Filling Stations," which sets forth requirements for storing and handling regulated substances at UST facilities, a copy of which may be obtained from API Publications Department, 1220 L Street NW, Washington, DC 20005, (202) 682-8375.

(3) Owners and operators must notify the department at least 30 days prior to switching to a regulated substance containing greater than 10 percent ethanol, greater than 20 percent biodiesel, or any other regulated substance identified by the department.

(4) Owners and operators with UST systems storing these regulated substances must demonstrate compatibility of the UST system (including the tank, piping, containment sumps, pumping equipment, release detection equipment, spill equipment, and overfill equipment) with the regulated substance stored using one of the following options:

(5) Owners and operators must maintain records in accordance with ARM 17.56.305 documenting compliance with ARM 17.56.303(4) for as long as the UST system is used to store the regulated substance.