27 CA ADC § 20340


      27 CCR s 20340

      Cal. Admin. Code tit. 27, s 20340


      CALIFORNIA CODE OF REGULATIONS
      TITLE 27. ENVIRONMENTAL PROTECTION
      DIVISION 2. SOLID WASTE
      SUBDIVISION 1. CONSOLIDATED REGULATIONS FOR TREATMENT, STORAGE, PROCESSING
      OR DISPOSAL OF SOLID WASTE
      CHAPTER 3. CRITERIA FOR ALL WASTE MANAGEMENT UNITS, FACILITIES, AND 
      DISPOSAL
      SITES
      SUBCHAPTER 2. SITING AND DESIGN
      ARTICLE 4. SWRCB - WASTE MANAGEMENT UNIT CONSTRUCTION STANDARDS
      This database is current through 04/21/06, Register 2006, No. 16. 

      s 20340. SWRCB - Leachate Collection and Removal Systems (LCRS). [C15: 
      s2543 // T14: s17781(b)(2) & (d)(1)]

      (a) Basic LCRS Design -Leachate collection and removal systems (LCRS) are 
      required for Class II landfills and surface impoundments, and for Class 
      III landfills which have a liner or which accept sewage or water treatment 
      sludge. The LCRS shall be installed directly above underlying containment 
      features for landfills and waste piles, and installed between the liners 
      for surface impoundments. LCRS requirements are summarized on Table 4.1. 
      Class II landfills and waste piles which contain only dry wastes (not 
      including nonhazardous solid waste and decomposable waste) may be allowed 
      to operate without an LCRS if the discharger demonstrates, based on 
      climatic and hydrogeologic conditions, that leachate will not be formed 
      in, or migrate from, the Unit; nevertheless, for a Class II or Class III 
      MSW landfill, after the Federal Deadline for installing liners at that 
      Unit, the LCRS requirements of SWRCB Resolution No. 93-62 apply to all 
      portions outside of the Unit's Existing Footprint.

      (b) Placement -Except as otherwise provided in ¶(e or f), where an LCRS is 
      used, it shall be installed immediately above the liner (except in the 
      case of a surface impoundment), and 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 Unit.

      (c) Head Buildup -The RWQCB shall specify design and operating conditions 
      in WDRs 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) Clogging -LCRSs shall be designed and operated to function without 
      clogging through the scheduled closure of the 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) Standard LCRS -LCRSs shall consist of a permeable subdrain layer which 
      covers the bottom of the Unit and extends as far up the sides as possible, 
      (i.e., blanket-type) except as provided in ¶(f). The LCRS 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 Unit.

      (f) Alternative LCRS -Except as otherwise required for MSW landfills, 
      under SWRCB Resolution No. 93-62, if a Class III landfill is required to 
      have an artificial liner and receives only permeable waste that allows 
      free drainage of percolating fluid, the RWQCB can allow the use of a 
      dendritic LCRS which underlies less than 100 percent of the waste; in this 
      type of LCRS system, only wastes which have an hydraulic conductivity 
      which approximates that of subdrain material, and which will remain 
      permeable throughout the active life and post- closure maintenance period 
      of the landfill, shall be placed adjacent to the liner. Furthermore, to 
      prevent ponding, when using this type of LCRS, all portions of the liner 
      not overlain by a portion of the subdrain system shall be sloped towards 
      the subdrain so that ponding is minimized and leachate is removed as 
      quickly as possible from the base of the landfill.

      (g) Leachate Handling -Except as otherwise provided under SWRCB Resolution 
      No. 93-62 (for MSW landfills subject to 40CFR258.28), collected leachate 
      shall be returned to the Unit(s) from which it came or discharged in 
      another manner approved by the RWQCB. Collected leachate can be discharged 
      to a different Unit only if:

      (1) the receiving Unit has an LCRS, contains wastes which are similar in 
      classification and characteristics to those in the Unit(s) from which 
      leachate was extracted, and has at least the same classification (under 
      Article 3 of this subchapter) as the Unit(s) from which leachate was 
      extracted;

      (2) the discharge to a different Unit is approved by the RWQCB;

      (3) the discharge of leachate to a different Unit shall not exceed the 
      moisture-holding capacity of the receiving unit, and shall comply with 
      s20200(d).

      (h) Leachate Production Rate -After July 18, 1997, for a landfill equipped 
      with an LCRS, the discharger shall note, as a part of each regularly 
      scheduled monitoring report [under Article 1, Subchapter 3, Chapter 3 of 
      this division (s20380 et seq.)], the total volume of leachate collected 
      each month since the previous monitoring report.


      


      Note: Authority cited: Section 1058, Water Code. Reference: Sections 13172 
      and 13360, Water Code; and Section 43103, Public Resources Code. 


       HISTORY 
         
      1. New section filed 6-18-97; operative 7-18-97 (Register 97, No. 25).
      27 CA ADC s 20340

      END OF DOCUMENT

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