“Impermeable” means not permitting passage through a substance which, when used in the solid waste rules to describe any soil or geosynthetic component of a landfill liner or cap, means the component has a saturated hydraulic conductivity of 1 x 10 -7 cm/sec or less.

Source. (See Revision Note #1 at chapter heading for Env-Sw 100) #8460-B, eff 10-28-05; ss by #14103, effective 10-23-24 (formerly Env-Sw 103.24) (see Revision Note #2 at chapter heading for Env-Sw 100)