Q-2, r. 19 - Regulation respecting the landfilling and incineration of residual materials

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120. If a remote landfill is temporarily closed for a period of 3 months or more, and subject to the second paragraph, the residual materials deposited in the landfill must be covered with at least 30 cm of soil at the latest by the expiry of the third month.
A remote landfill that is unused for a period of 12 months must be filled in at the latest by the expiry of that period and section 119 applies, with the necessary modifications.
O.C. 451-2005, s. 120.