Cal. Code Regs. tit. 23, § 2542 – Liners.

(a) Liners shall be designed and constructed to contain the fluid, including waste and leachate, as required by Article 3 of this chapter.
(b) Clay liners for a Class I waste management unit shall be a minimum of 2 feet thick and shall be installed at a relative compaction of at least 90 percent.
(c) Synthetic liners shall have a minimum thickness of 40 mils.
(d) Liners shall be installed to cover all natural geologic materials at a waste management unit likely to be in contact with waste or leachate.

Note: Authority cited: Section 1058, Water Code. Reference: Sections 13172 and 13360, Water Code.

1. Amendment of subsections (a)-(c) and repealer of subsection (e) filed 6-18-97; operative 7-18-97 (Register 97, No. 25).