Referenced Document MCU13/0171

Controlling stormwater pollution on your building site




Sediment control                   SEE FACT SHEET 4




    STABILISED ENTRY/EXIT POINT (RUMBLE PAD)

•     Manage entry/exit point (rumble pad) so that sediment is not tracked
      off the site.
•     Restrict site access to one stabilised location.
•     Recommended construction method for stabilising access points
      is a 150-200 mm deep pad of minimum 40 mm crushed rock.
•     The pad should be at least 2 metres wide and extend from the kerb
                                                                                                                          ✓
                                                                               Stabilised gravel entry/exit point (rumble pad)
      to the building slab.
•     Where the entry/exit pad slopes towards the road, a 200 mm high bund (hump) should be installed across the
      pad to deflect stormwater run-off to the side where it can be filtered by a sediment fence.
Note: The location of the permanent driveway may not be an appropriate location for the construction entrance.

    SEDIMENT BARRIERS/FENCES

•     Install sediment barriers along the lower
      side of the soil disturbance.
•     The most efficient sediment barrier for
      building sites is specially-manufactured
      geotextile sediment fencing.
•     Sediment fences on building sites
      are usually wire-tied to steel or hardwood
      posts (wire-tied sediment fences have the
      advantage of being more readily unhooked
      from their support posts).
•     The support posts are spaced no greater
      than 2 metres apart and the sediment
      fence buried to a depth of 200 mm.                                                                                  ✓
                                                         Sediment fence
•     For public safety and sediment control
      efficiency, sediment barriers should not be
      located outside property boundaries without Council approval.
•     Sediment barriers should only be placed on the road as a last resort.
•     Sediment barriers placed in front of roadside stormwater inlets are rarely as effective as onsite controls and
      at best usually result in the sediment being washed down the street and into the nearest open gully inlet.
•     Only use proper geotextile sediment fence fabric. Don’t use filter cloth or shade cloth.

    USE OF SIGNS

Public signs that warn of the need for proper sediment control devices and
maintenance are becoming more widely used. Contact your council for further
information.




                                                                                                                          ✓
                                                                                          Sediment control information signage




5