Before a soil liner is installed, the surface soil must be sealed, including the berm of an earthen dike, with a sealing agent such as sodium bentonite, attapulgite, or a similar cohesive material, including clay. The soil liner must be constructed in accordance with reliable engineering recommendations to establish a barrier layer that results in a downward water movement of not greater than one-millionth of one centimeter per second (1.0 × 10-6 cm/sec) at construction and maintained at one hundred thousandth of a centimeter per second (1.0 × 10-5 cm/sec) with a thickness of not less than six (6) inches. The soil liner must be protected based upon reliable engineering practices to maintain its integrity and performance. If heavy mechanized equipment is to be moved over the walls or floor liner, protection to the secondary containment must be provided.

As added by P.L.98-2026, SEC.50.