27 CA ADC § 20365


      27 CCR s 20365

      Cal. Admin. Code tit. 27, s 20365


      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 20365. SWRCB - Precipitation and Drainage Controls. [C15: s2546 // T14: 
      s17778(e), (f)(1), (g), & (j)]

      (a) General -Units and their respective containment structures shall be 
      designed and constructed to limit, to the greatest extent possible, 
      ponding, infiltration, inundation, erosion, slope failure, washout, and 
      overtopping under the precipitation conditions specified in Table 4.1 (of 
      this article) for each class of waste management unit (Unit). [Note: see 
      also s21090(b)(1).]

      (b) Undiverted Precipitation -Precipitation on landfills or waste piles 
      which is not diverted by covers or drainage control systems shall be 
      collected and managed through the leachate collection and removal system, 
      which shall be designed and constructed to accommodate precipitation 
      conditions specified in Table 4.1 of this article or each class Unit.

      (c) Performance Standards -Diversion and drainage facilities shall be 
      designed, constructed, and maintained:

      (1) to accommodate the anticipated volume of precipitation and peak flows 
      from surface runoff under the precipitation conditions specified in Table 
      4.1 of this article for each class of Unit;

      (2) to effectively divert sheet flow runoff laterally, or via the shortest 
      distance, into the drainage and collection facilities;

      (3) to prevent surface erosion through the judicious use of:

      (A) energy dissipators where required to decrease the velocity of runoff; 
      and

      (B) slope protection and other erosion control measures;

      (4) to control and intercept run-on, in order to isolate uncontaminated 
      surface waters from water that might have come into contact with waste;

      (5) to take into account:

      (A) for closed Units and for closed portions of Units, the expected final 
      contours of the closed Unit, including its planned drainage pattern;

      (B) for operating portions of Units other than surface impoundments, the 
      Unit's drainage pattern at any given time;

      (C) the possible effects of the Unit's drainage pattern on and by the 
      regional watershed;

      (D) the design capacity of drainage systems of downstream and adjacent 
      properties by providing for the gradual release of retained water 
      downstream in a manner which does not exceed the expected peak flow rate 
      at the point of discharge if there were no waste management facility; and

      (6) to preserve the system's function. Therefore, the discharger shall 
      periodically remove accumulated sediment from the sedimentation or 
      detention basins as needed to preserve the design capacity of the system.

      (d) Maintain Capacity -Collection and holding facilities associated with 
      precipitation and drainage control systems shall be emptied immediately 
      following each storm or otherwise managed to maintain the design capacity 
      of the system.

      (e) Divert Drainage -Surface and subsurface drainage from outside of a 
      Unit shall be diverted from the Unit.

      (f) Resist Erosion from Design Storm -Cover materials shall be graded to 
      divert precipitation from the Unit, to prevent ponding of surface water 
      over wastes, and to resist erosion as a result of precipitation with the 
      return frequency specified in Table 4.1 (of this article) for each class 
      of Unit, unless, for a landfill, the CIWMB/EA requires (for protection of 
      public health and safety) that the design be capable of resisting erosion 
      resulting from a longer return interval storm [see s21150(b)]. Any 
      drainage layer in the final cover shall be designed and constructed to 
      intersect with the final drainage system for the Unit in a manner 
      promoting free drainage from all portions of the drainage layer.


      


      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 20365

      END OF DOCUMENT

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