(a) Class II waste management units (Class II “Units”) shall be designed and constructed to prevent migration of wastes from the Units to adjacent geologic materials, ground water, or surface water, during disposal operations, closure, and the post-closure maintenance period. Class II and Class III MSW landfills are also subject to any applicable waste containment system design requirements of SWRCB Resolution No. 93-62 to the extent that such requirements are more stringent than those applicable to a non-MSW Class II or Class III landfill under this subdivision.

(b) Each Class II Unit shall be designed and constructed for the containment of the specific wastes which will be discharged.

(c) Class III landfills shall have containment structures which are capable of preventing degradation of waters of the state as a result of waste discharges to the landfills if site characteristics are inadequate.

(d) For the purposes of this paragraph, the words “new” and “existing” have the same meaning as described in § 20080(d). New landfills, waste piles, and surface impoundments shall comply with the requirements of this article. Existing waste piles and surface impoundments shall be fitted with liners and leachate collection and removal systems as described in § 20330 and § 20340 as feasible. Existing landfills and waste piles shall have interim cover as described in § 20705. Existing landfills, waste piles, and surface impoundments shall be fitted with subsurface barriers as described in § 20360 as needed and feasible, and shall have precipitation and drainage control facilities as described in § 20365. Existing surface impoundments shall comply with § 20375. New and existing land treatment units shall comply with § 20377. All existing Units shall comply with the seismic design criteria in Section 20370.

(e) Containment structures shall be designed by, and construction shall be supervised and certified by, a registered civil engineer or a certified engineering geologist. Units shall receive a final inspection and approval of the construction by RWQCB or SWRCB staff before use of the Unit commences.

(f) The discharger shall maintain the integrity of containment structures in spite of normal excavation or fire control work; nevertheless, for fire control work, the discharger can damage containment structures to the extent necessary to control the fire, so long as the discharger promptly repairs such damage after extinguishing the fire. Excavations made as part of discharge operations shall not result in removal of any portion of a containment structure.

(g) Stability Analysis--For any portions of the Unit's containment system installed after July 18, 1997 for which the RWQCB has not approved a slope and foundation stability report on or before that date, the discharger shall meet the requirements of § 21750(f)(5).