24.1. A stockpiling platform for contaminated soil or other residual materials intended to be used as cover material must be composed of one of the following materials:(1) a homogenous natural soil layer with a constant hydraulic conductivity of 1 x 10‑6 cm/s or less to a minimum depth of 3 m, the hydraulic conductivity to be established in situ;
(2) a layer of clayey materials with a constant hydraulic conductivity of 1 x 10‑7 cm/s or less to a minimum depth of 1 m;
(3) a geomembrane at least 1.5 mm thick;
(4) a bentonite geocomposite;
(5) a layer of bituminous concrete over a bituminous membrane, or a layer of cement concrete, the operator being required, in either case, to verify the platform or have it verified at least once a year to detect fractures or fissures that might form and to repair any defects detected;
(6) any other liner system composed of materials at least as effective as one of the above-mentioned systems.
The platform must have a liquid collection system.
868-2020O.C. 868-2020, s. 71.