Except as provided in 310 CMR 40.0317, persons required to notify under 310 CMR 40.0331 shall notify the Department not more than 72 hours after obtaining knowledge of a threat of release of oil and/or hazardous material to the environment from an Underground Storage Tank, as established by a tightness test failure pursuant to 310 CMR 80.32: Requirements for Tank and Pipe/Line Tightness Testing.
310 CMR, § 40.0314