B-1.1, r. 3 - Safety Code

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196. An owner who ceases to remove petroleum products from an aboveground tank for a period of 180 days or more but less than 2 years must
(1)  drain all petroleum products from the tank, piping, loading and unloading equipment and leak and spill protection equipment;
(2)  lock the fill and gauge pipe caps and covers and any other opening in an installation that contains a petroleum product, and lock the loading and unloading equipment and the main electrical control;
(3)  condemn the stairs, walkways and other construction giving access to the roof of a tank; and
(4)  permanently open the dike drainage valve if the dike contains only 1 tank.
O.C. 221-2007, s. 1.