97. The bottom of the disposal areas of a northern landfill must be above the permafrost line at a minimum distance of 30 cm above the groundwater level. Any lowering of the groundwater level by pumping, draining or otherwise is prohibited.
The removed materials must be stockpiled on the perimeter of the site to be used to cover the residual materials.
Sludge must be deposited in an area separate from the area in which other residual materials are deposited so as to facilitate the burning of the residual materials.