The owner or operator of a UST must contain and immediately clean up a spill or overfill, report to the department, and begin corrective action in accordance with 18 AAC 78.220 - 18 AAC 78.280,

1. (1) as soon as the person has knowledge of a release that is known or suspected to be 55 gallons or more;

2. (2) not later than 24 hours after the person has discovered soil or water contamination, by direct observation, through site characterization or assessment under 18 AAC 78.090, or through any other means, of

   1. (A) a belowground release from the UST in any amount;
   2. (B) an aboveground release to land in excess of 10 gallons; or
   3. (C) an aboveground release to water of the state if the release causes a sheen or discoloration of the water surface; and
3. (3) not later than seven days after discovering a release of less than 10 gallons to land, or a release of less than one-half pint to water.

(Eff. 3/25/91, Register 118; am 11/3/95, Register 136; am 1/22/99, Register 149; am 9/29/2018, Register 227)

Authority: AS 46.03.020, AS 46.03.365, AS 46.03.775