27 CA ADC § 20375


      27 CCR s 20375

      Cal. Admin. Code tit. 27, s 20375


      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 20375. SWRCB - Special Requirements for Surface Impoundments. (C15: 
      s2548)

      (a) Freeboard -Surface impoundments shall have sufficient freeboard to 
      accommodate seasonal precipitation and the design storm specified in Table 
      4.1 of this article, but in no case less than 2 feet (measured vertically, 
      from the water surface up to the point on the surrounding lined berm, or 
      dike, having the lowest elevation), and shall be designed and constructed 
      to prevent overtopping as a result of wind conditions likely to accompany 
      such precipitation conditions. The RWQCB can allow a freeboard of less 
      than 2 feet at surface impoundments located on the interior portions of a 
      waste management facility where: 1) these interiormost impoundments are 
      designed such that potential overflows would be reliably conveyed by 
      gravity flow and discharged to other surface impoundments having adequate 
      capacity to receive such diversion without exceeding their respective 
      freeboard limitations; 2) the operation implements a properly developed 
      water balance plan; and 3) the facility is provided with a fail-safe 
      emergency retention area solely for the purpose of containing wastes due 
      to surface impoundment failures.

      (b) Operation Plan -An operation plan shall be submitted to the RWQCB 
      which will provide operation levels and waste input quantities permitted 
      each month based on anticipated precipitation and on past precipitation 
      conditions for the year.

      (c) Fail-Safe -Direct pipeline discharge to surface impoundments shall be 
      either equipped with devices or shall have fail-safe operating procedures 
      to prevent overfilling. Discharges shall be stopped in the event of any 
      containment system failure which causes a threat to water quality.

      (d) Unauthorized Discharges -There shall be no discharge from a surface 
      impoundment except as authorized by WDRs.

      (e) Scour Protection -Surface impoundments shall be designed and 
      constructed to prevent scouring of containment structures at points of 
      discharge into the impoundments and by wave action at the waterline.

      (f) Liner Inspections -All visible portions of synthetic liners shall be 
      inspected weekly until all free liquid is removed from the surface 
      impoundment as part of closure pursuant to s21400(a). If, during the 
      active life of the impoundment, the wastes are removed and the bottom of 
      the impoundment is cleaned down to the liner, an inspection shall be made 
      of the bottom of the liner prior to refilling of the impoundment.


      


      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 20375

      END OF DOCUMENT

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