1995-01-02 - Laserfiche WebLink

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L U ® (3) An adequate and permanent method of handling relief vent discharge and test water discharge shall be provided. (4) Clear unobstructed space for the relief vent shall be provided to prevent the vent from becoming blocked or flooded. C. DDCVA & DCVA Installation (1) The assembly shall not be installed below grade, unless the following criteria can be met and accepted by the Approving Authority: (a) The vault and its installation shall be approved by BWU before the start of construction. (b) The vault shall not be subject to flooding. (c) The walls of the vault shall extend above the finished grade a minimum of 3" to prevent intrusion of water or dirt. (d) The vault shall be water-tight to prevent intrusion of water or dirt. (e) The vault shall drain to daylight through an adequate and • permanent gravity drain with a slope of at least 1 degree. Installation plans shall show the elevation of the vault floor and the area the water will drain to. Plans shall show drainage pipe depth and location. Drainage pipe size shall be two inches larger than the blow-off. Protection on the drainage outlet shall be provided to prevent undesirable creatures from entering. (f) The vault cover shall be removable to allow full access to the vault. A minimum of two lifting points shall be provided. (g) An access door shall be installed in the vault cover on the testable side of the assembly. Approved doors shall be similar or equal to Bilco or Halladay and shall be a minimum of 24" x 24". (h) Directly below the access door, provide steps in the vault wall similar or equal to ICM Plastic Manhole Steps. Steps are 1/2 inch steel reinforced rod encapsulated in special polypropylene plastic. (2) Minimum installation clearance dimensions shall be 30 inches between the assembly and corresponding wall and 12 inches on the opposite side, 8 inches on each end, 6 inches above the highest point and 12 inches under 21