Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

4




    SE DIMENT CONTROL
                                                                           on your building site


    A combination of sediment control measures is often needed on an individual site. Sediment controls
    usually consist of a sediment barrier installed along the lower side of the soil disturbance, and a stabilised
    entry/exit pad (rumble pad).




    Where possible, manage the entry/exit point of the site so that sediment is not tracked off the site.
    Where practical, restrict the entry/exit point to one stabilised location, not necessarily at the location
    of the permanent driveway (refer Figure 4.1).


     Stabilised Entry/Exit Pad - Building Sites                                                                     Building Site

                                                                                Runoff diversion bund
     Entry/exit pad extends
                                                                                incorporated into the pad
     from kerb to building slab
                                                                                when the entry/exit pad is
     where practical                  Mi;,n
                                            um !e                               located down-slope of the
                                                         h 10                   soil disturbance
                                    200mm (min)      t          'n (mint                                                     Runoff
                                                                                                                             diversion
                 150-200mm (min)                    } Y^^^^                                                                  bank



     Runoff from pad                                                          pat                                     Sediment fence     / ' . -
     directed to                                                                        Roadway                                                    Make safe for
     sediment trap                                                                                            u          Footpath
                                                                                                                                                   pedestrian
         Geotextile filter cloth                                                                              n                                      of_f is
         (as directed or when                                                                                  E
         working on clayey soils)                                                             Figure 4.1               Figure 4.2



    Stabilised entry/exit detail                                                                                   Entry/exit bund detail


    A rumble pad may be used to stabilise the entry/exit point. These pads should be at least 2 metres wide
    consisting of minimum 40 mm crushed rock placed 150-200 mm thick over geotextile filter cloth. Where
    possible, the rumble pad should extend from the kerb to the building slab or a minimum length of 10m.
    Where practical, the rumble pad should extend from the kerb to the building slab. Where necessary, 20 mm
                                                                                                             aggregate or blue metal should be placed
                                                                                                             over the crushed rock between the
                                                                                                             property boundary and the road kerb to
                                                                                                             make the entry/exit point (rumble pad)
                                                                                                             safe for pedestrian traffic.


                                                                                                             Where the entry/exit point (rumble pad)
                                                                                                             slopes toward the road, install a minimum
                                                                                                             200mm high flow diversion bund across
                                                                                                             the pad to deflect stormwater run-off into
                                                                                                             the main sediment control zone or into
                                                                                                             a separate U-shaped sediment fence.
                                                                                                             (refer Figure 4.2).
    Stabilised entry/exit point (rumble pad)