NAC445A.435. Minimum design criteria: Ponds.

     1. All ponds which are intended to contain process fluids must have a primary synthetic liner and a secondary liner. Between the liners there must be a material which has the ability to rapidly transport any fluids entering it to a collection point which:

     (a) Is accessible; and

     (b) Has a system for recovering those fluids.

     2. When the material between the liners is unable to collect, transport and remove all liquids at a rate that will prevent hydraulic head transference from the primary liner to the secondary liner, the pond must be shut down.

     3. Ponds which are primarily designed to contain excess quantities of process fluids that result from storm events for limited periods may be constructed with a single liner if approved by the Department.

     4. Ponds containing nonprocess fluids may be required to be lined depending on their potential to degrade waters of the State.

     (Added to NAC by Environmental Comm’n, eff. 9-1-89)—(Substituted in revision for NAC 445.24364)