B-1.1, r. 3 - Safety Code

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175. An owner who ceases to remove petroleum products from an underground tank for a period of at least one week but less than 180 days must
(1)  lock the fill and gauge pipe caps and covers and motor fuel dispensers and lock the main electrical control; and
(2)  gauge each tank every week.
O.C. 221-2007, s. 1.