95. Final disposal sites of hazardous materials may be laid out only— on land where the soil on which the materials will be deposited is composed of a natural homogeneous layer having a hydraulic conductivity equal or less than 1 × 10-6 cm/s at least 6 m thick whose bed and walls are protected by an impermeable synthetic membrane;
— on land on which the thickness of the soil having a hydraulic conductivity equal or less than 10-6 cm/s is between 3 and 6 m, provided that the bed and walls of the area where the materials will be deposited have extra protection by the overplacement of 2 impermeable synthetic membranes, the installation of an impermeable synthetic membrane over a layer of clayish materials having a hydraulic conductivity equal or less than 1 × 10-7 cm/s at least 120 cm thick after compaction or by another waterproofing system whose components ensure at least equivalent efficiency.