Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.56 - UNDERGROUND STORAGE TANKS PETROLEUM AND CHEMICAL SUBSTANCES
Subchapter 17.56.5 - Release Reporting, Investigation, and Confirmation
Rule 17.56.505 - REPORTING AND CLEANUP OF SPILLS AND OVERFILLS

(1) Owners and operators must contain and immediately clean up a spill or overfill, immediately report the spill or overfill to the department pursuant to (3) or by another method that ensures that a person within the department receives notice within 24 hours of the release, and must begin corrective action in accordance with subchapter 6 in the following cases:

(2) Owners and operators must contain and immediately clean up a spill or overfill of petroleum that is less than 25 gallons and a spill or overfill of a hazardous substance that is less than the reportable quantity. If cleanup cannot be accomplished within 24 hours, owners and operators must immediately notify the department.

(3) Telephone notification required in (1) or (2) must be made to a person in the department or to the 24-hour Disaster and Emergency Services duty officer at (406) 324-4777. Messages left on answering machines, received by facsimile, e-mail, voice mail or other messaging device are not adequate 24-hour notice. For further assistance, the department's release reporting hotline may be reached at 1 (800) 457-0568.