- (a) Design standards. The drainage and protective layer shall consist of a minimum of 24 inches of material that will maintain a liquid head of less than or equal to 12 inches above, and protect, the underlying FML.
(b) Geonet. If a geonet is used:
- (1) the hydraulic conductivity of a geonet shall be 1 x 10-1 cm/sec or greater;
- (2) the geonet shall be placed on the bottom and side slopes of the disposal cell, directly on top of the geomembrane;
- (3) geotextile fabric shall be placed directly on the geonet; and
- (4) the geonet shall be tied into a removal pipe system designed to meet the standards for collection pipes.
Added at 20 Ok Reg 1151, eff 6-1-03