California Code of Regulations › Title 23 - Waters › Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards › Chapter 15 - Discharges of Hazardous Waste to Land › Article 4 - Construction Standards for Class I Units › Section 2543 - Leachate Collection and Removal Systems

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
				  Leachate collection and removal systems are required for Class I landfills,
				  surface impoundments, and waste piles. The systems shall be installed directly
				  above underlying containment features for landfills and waste piles, and
				  installed between the liners for surface impoundments. Leachate collection and
				  removal systems requirements are summarized on Table 4.1.
(b) Where leachate collection and removal
				  systems are used, they shall be installed immediately above the liner, or
				  between the inner and outer liner of a double-liner system, and shall be
				  designed, constructed, maintained, and operated to collect and remove twice the
				  maximum anticipated daily volume of leachate from the waste management
				  unit.
(c) Regional boards shall
				  specify design and operating conditions in waste discharge requirements to
				  ensure that there is no buildup of hydraulic head on the liner. The depth of
				  fluid in the collection sump shall be kept at the minimum needed to ensure
				  efficient pump operation.
(d)
				  Leachate collection and removal systems shall be designed and operated to
				  function without clogging through the scheduled closure of the waste management
				  unit and during the post-closure maintenance period. The systems shall be
				  tested at least annually to demonstrate proper operation. The results of the
				  tests shall be compared with earlier tests made under comparable
				  conditions.
(e) Leachate collection
				  and removal system shall consist of a permeable subdrain layer which covers the
				  bottom of the waste management unit and extends as far up the sides as
				  possible, (i.e., blanket-type). The collection and removal system shall be of
				  sufficient strength and thickness to prevent collapse under the pressures
				  exerted by overlying wastes, waste cover materials, and by any equipment used
				  at the waste management units.
(f)
				  [Reserved.]
(g) Collected leachate
				  shall be system returned to the waste management unit(s) from which it came or
				  discharged in another manner approved by he regional board. Collected leachate
				  may be discharged to a different waste management unit if:
(1) the receiving waste management unit has a
				  leachate collection and removal system, contains wastes which are similar in
				  classification and characteristics to those in the waste management unit(s)
				  from which leachate was extracted, and has at least the same classification
				  under Article 3 of this chapter as the units from which leachate was extracted;
				  and
(2) the discharge to a
				  different waste management unit is approved by the regional board;
				  and
(3) the discharge of leachate
				  to a different waste management unit shall not exceed the moisture-holding
				  capacity of the receiving unit, and shall comply with Subsection
				  2520(d) of this
				  chapter.