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

Section 50 Disposition versions

2020-09-17

50. The residual materials landfilled in the disposal areas of an engineered landfill must, once they have reached the maximum authorized height or landfilling operations are terminated, be covered with a final cover as soon as climatic conditions permit.

The final cover system must have, from the bottom up,

(1)  a drainage layer consisting of soil with a constant minimum hydraulic conductivity of 1 x 10-3 cm/s through a minimum thickness of 30 cm, designed to collect landfill gas while allowing the circulation of liquids;

(2)  an impermeable soil layer with a constant maximum hydraulic conductivity of 1 x 10-5 cm/s through a minimum thickness of 45 cm after compaction, or a geomembrane at least 1 mm thick;

(3)  a barrier soil layer at least 45 cm thick, having characteristics that preserve the integrity of the impermeable layer; and

(4)  a soil layer at least 15 cm thick, suitable for vegetation.

The soil referred to in subparagraph 1 of the second paragraph may contain contaminants in a concentration equal to or lower than the limit values set out in Schedule I to the Land Protection and Rehabilitation Regulation (chapter Q-2, r. 37) for volatile organic compounds and in Schedule II to that Regulation for other contaminants. The soils referred to in subparagraphs 2 to 4 of the second paragraph may also contain such contaminants in a concentration equal to or lower than the limit values set out in Schedule I to that Regulation. The limit values prescribed by this paragraph do not apply to contaminants that do not originate from human activity.

The layers referred to in subparagraphs 1 to 4 of the second paragraph may consist of another material if the material will achieve protection efficiency at least equivalent to that of the materials prescribed in those subparagraphs and the minimum thickness of the layers is as prescribed in those subparagraphs. In addition, the material used must, for the layers referred to in subparagraphs 2 to 4 of the second paragraph, comply with the requirements of the third paragraph.

The final cover slope must be of at least 2% and no more than 30% to allow water to flow away from the disposal areas and limit soil erosion. In addition, in the case of disposal areas that have an impermeable sideslope liner system pursuant to section 21, surface water infiltration into the disposal areas must be reduced by extending the layers referred to in subparagraphs 2, 3 and 4 of the second paragraph beyond the liner perimeter, or by another cover procedure that reduces water infiltration into the disposal areas.

The provisions of sections 34 to 36 relating to quality assurance and control apply, with the necessary modifications, to the final cover of disposal areas prescribed by this section.

O.C. 451-2005, s. 50; O.C. 451-2011, s. 12; O.C. 868-2020, s. 18.

2012-09-01

50. The residual materials landfilled in the disposal areas of an engineered landfill must, once they have reached the maximum authorized height or landfilling operations are terminated, be covered with a final cover as soon as climatic conditions permit.

The final cover system must have, from the bottom up,

(1)  a drainage layer consisting of soil with a constant minimum hydraulic conductivity of 1 x 10-3 cm/s through a minimum thickness of 30 cm, designed to collect landfill gas while allowing the circulation of liquids;

(2)  an impermeable soil layer with a constant maximum hydraulic conductivity of 1 x 10-5 cm/s through a minimum thickness of 45 cm after compaction, or a geomembrane at least 1 mm thick;

(3)  a barrier soil layer at least 45 cm thick, having characteristics that preserve the integrity of the impermeable layer; and

(4)  a soil layer at least 15 cm thick, suitable for vegetation.

The soil referred to in subparagraph 1 of the second paragraph may contain contaminants in a concentration equal to or lower than the limit values set out in Schedule I to the Land Protection and Rehabilitation Regulation (chapter Q-2, r. 37) for volatile organic compounds and in Schedule II to that Regulation for other contaminants. The soils referred to in subparagraphs 2 and 3 of the second paragraph may also contain such contaminants in a concentration equal to or lower than the limit values set out in Schedule I to that Regulation. The limit values prescribed by this paragraph do not apply to contaminants that do not originate from human activity.

The layers referred to in subparagraphs 1 to 4 of the second paragraph may consist of another material if the material will achieve protection efficiency at least equivalent to that of the materials prescribed in those subparagraphs, the material meets where applicable the requirements of the third paragraph and the minimum thickness of the layers is as prescribed in those subparagraphs.

The final cover slope must be of at least 2% and no more than 30% to allow water to flow away from the disposal areas and limit soil erosion. In addition, in the case of disposal areas that have an impermeable sideslope liner system pursuant to section 21, surface water infiltration into the disposal areas must be reduced by extending the layers referred to in subparagraphs 2, 3 and 4 of the second paragraph beyond the liner perimeter, or by another cover procedure that reduces water infiltration into the disposal areas.

The provisions of sections 34 to 36 relating to quality assurance and control apply, with the necessary modifications, to the final cover of disposal areas prescribed by this section.

O.C. 451-2005, s. 50; O.C. 451-2011, s. 12.