RFI - Attachment 7 - Updated SWMP

4. Construction Phase Management
4.1.      Erosion and Sediment Control
The management of the site during the construction phase is an important step in ensuring water quality
standards are achieved. Implementation of best practice Erosion and Sediment Control techniques is
imperative to managing the quality of runoff affected by construction works.

The following points provide general guidance on the management of stormwater during the construction
phase. Detailed Erosion and Sediment Control Management Plans should be developed in conjunction with
the Operational Works design prior to construction works commencing in accordance with the International
Erosion Control Association (IECA) - “Best Practice Erosion and Sediment Control (BPESC) document” and
overseen by a Certified Professional in Erosion and Sediment Control (CPESC) or Registered Professional
Engineer Queensland (RPEQ).

    1.   Establish a single stabilised entry/exit point for the site works;
    2.   Construct a shake-down grid at the entrance to facilitate the removal of sediment from trucks
         leaving the site. The access road extending from the end of existing road or kerb to the grid should
         comprise a 150-200 mm deep pad of 40 mm crushed rock;
    3.   Install sediment fences along the lower boundaries of the site;
    4.   Construct one or more strategically placed sediment basins in the proposed drainage reserve and
         construct contour drains / bunds to direct disturbed runoff to the sediment basins;
    5.   Install bins and/or wind-proof litter areas on-site to minimise the dispersion of gross pollutants;
    6.   Maintain on site sufficient materials necessary for the emergency repair of all erosion control
         devices. This includes silt fences, clean crushed rock for reapplication to the entrance road and for
         replacement of rock within temporary drainage channels, and flocculants for settling sediment
         basins;
    7.   Following each day’s construction works, ensure that any material on road surfaces is swept from
         the road, and not permitted to be washed down the gutters and piped drainage systems;
    8.   Quality of pooled water within sediment basins are to be monitored prior to dewatering, sufficient
         time should be given to allow sediment to settle (possible with the assistance of a suitable
         flocculent if necessary) &/or filtering during pumping operations; and
    9.   Final establishment of bioretention basin should not occur until full stabilisation of upstream
         catchment has occurred; preferably these should be temporarily turfed during the maintenance
         period while dwelling construction is occurring.
It shall be the responsibility of the developer, through their principal contractor, to ensure that temporary
sediment and erosion controls are installed and maintained correctly.




21-0211SMP01V1 | Stormwater Management Plan | Good Shepherd Lutheran College Arts Centre               Page 15