Section 20260 - SWRCB-Class III: Landfills for Nonhazardous Solid Waste. (C15: Section 2533)(a) General--Class III landfills shall be located where site characteristics provide adequate separation between nonhazardous solid waste and waters of the state. The classification criteria in this section shall be used for reclassification of existing landfills at disposal sites approved as Class II-1 or II-2 (under previous versions of these SWRCB regulations) and any expansions of such landfills.(b) Geologic Setting. (1) MSW landfills are subject to the SWRCB-promulgated waste containment requirements of this subdivision and of SWRCB Resolution No. 93-62. New Class III and existing Class II-2 landfills shall be sited where soil characteristics, distance from waste to ground water, and other factors will ensure no impairment of beneficial uses of surface water or of ground water beneath or adjacent to the landfill. Factors that shall be evaluated include: (A) size of the landfill:(B) hydraulic conductivity and transmissivity of underlying soils;(C) depth to ground water and variations in depth to ground water;(D) background quality of ground water;(E) current and anticipated use of the ground water; and(F) annual precipitation.(2) Where consideration of the factors in ¶(b)(1) indicates that site characteristics alone do not ensure protection of the quality of ground water or surface water, Class III landfills shall be required to have a single clay liner with hydraulic conductivity of 1x10-6 cm/sec or less.(c) Flooding--New Class III and existing Class II-2 landfills shall be designed, constructed, operated, and maintained to prevent inundation or washout due to floods with a 100-year return period. MSW landfills are also subject to any more-stringent flood plain and wetland siting requirements referenced in SWRCB Resolution No. 93-62 (i.e., see §§ 258.11, 258.12, and 258.16 of 40CFR 258).(d) Ground Rupture--New Class III and expansions of existing Class II-2 landfills shall not be located on a known Holocene fault. However, existing landfills assigned a Class II-2 designation under previous versions of the SWRCB regulations may be located on a known Holocene fault, provided that the Unit's containment structures are capable of withstanding ground accelerations associated with the maximum probable earthquake (see § 20370).(e) Rapid Geologic Change--New Class III and unreclassified existing Class II-2 landfills can be located within areas of potential rapid geologic change only if the RWQCB finds that the Unit's containment structures are designed, constructed, and maintained to preclude failure. MSW landfills are also subject to any more-stringent unstable area siting requirements referenced in SWRCB Resolution No. 93-62 (see § 258.15 and § 258.16 of 40CFR 258).Cal. Code Regs. Tit. 27, § 20260
1. New section and Table 3.1 filed 6-18-97; operative 7-18-97 (Register 97, No. 25). Note: Authority cited: Section 1058, Water Code. Reference: Sections 13172 and 13360, Water Code; and Section 43103, Public Resources Code.
1. New section and Table 3.1 filed 6-18-97; operative 7-18-97 (Register 97, No. 25).