10. A person who installs a tube well in a rock formation must connect a drive shoe to the lower end of the casing.
In addition, if the rock formation lies less than 5 m from the ground surface,
(1) the well must be drilled in such a way so as to obtain, all along the depth required for sealing, a diameter at least 10 cm wider than the nominal diameter of the casing;
(2) the casing must be sunk to a depth of not less than 5 m from the ground surface; and
(3) the annular space must be filled in accordance with good practice using a material that ensures a watertight and durable sealing such as a cement bentonite mix; drill cuttings are not acceptable.
The casing must be anchored in bedrock for at least 60 cm or until penetration ceases.
The connection between 2 casings must be watertight.