NAC459.811. Design of disposal area.

The design of the disposal area must be directed toward the long-term isolation of wastes and avoidance of the need for active maintenance after closure of the area, and must meet the following criteria:

     1. The design and operation of the disposal area must be compatible with the plan for closure and stabilization and lead to closure which reasonably ensures that the objectives of disposal will be met.

     2. The disposal area must be designed to complement and improve, where appropriate, the capability of the disposal area’s natural characteristics to ensure that the objectives of disposal will be met.

     3. Covers must be designed to:

     (a) Minimize the infiltration of water to the extent practicable;

     (b) Direct percolating or surface water away from the waste; and

     (c) Resist degradation by surface geologic processes and biotic activity.

     4. Surface features must direct the drainage of surface water away from disposal units at velocities and gradients that will not cause erosion and result in active maintenance of the units in the future.

     5. The disposal area must be designed to minimize, to the extent practicable, the contact of:

     (a) Water with waste during storage;

     (b) Standing water with waste during disposal; and

     (c) Percolating or standing water with waste after disposal.

     (Added to NAC by Bd. of Health, eff. 4-27-84)