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Full Capture Certification for Trash TMDLs

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  • Definition of Full Capture Certification:
    A full capture system is any single device or series of devices that traps all particles retained by a 5 mm mesh screen and has a design treatment capacity of not less than the peak flow rate Q resulting from a one-year, one-hour, storm in the subdrainage area.

    Rational equation is used to compute the peak flow rate:

    Q = C I A
    where:
    • Q = design flow rate (cubic feet per second, cfs);
    • C = runoff coefficient (dimensionless);
    • I = design rainfall intensity (inches per hour, as determined per the rainfall isohyetal map in Figure A), and
    • A= subdrainage area (acres)

  • Procedures and Requirements for Certification of Best Management Practices (BMPs) for Trash Control as a Full Capture System.

Request for Full Capture Received From:
Full Capture Certifications Issued:
  • For any question regarding Full Capture Certification, please contact Carlos Urrunaga, phone: (213) 620-2083.


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