RFI - Appendix G SWMP by MPN Consulting

 16 December 2021


A Bioretention Basin Maintenance Checklist is attached in Appendix 4.

Detailed maintenance techniques can be found in the Water By Design Maintaining Vegetated
Assets Guideline.


5.6       Construction Phase (Sediment and Erosion Control)

5.6.1 Intent of Erosion and Sediment Control Management Plan

To prevent stormwater contamination (of watercourses) and the release of contaminated
stormwater and wastewater by ensuring compliance with the Environmental Protection Act 1994
and Environmental Protection (Water) Policy 2009.


5.6.2 Implementation Strategy

Establish control measures and best practice approaches to prevent stormwater contamination
and minimise the risk and adverse effects of erosion and sedimentation. All Erosion and Sediment
Control measures must be designed, constructed and maintained in a manner that is
commensurate with the site’s erosion risk.


5.6.3 Erosion and Sediment Control Measures

      •   Obtain a licence or approval to operate activities that are classed as environmental
          relevant activities (i.e. they have the potential to cause environmental harm).
      •   Implement and maintain appropriate control measures to prevent sediment leaden
          wastewater and other potential pollutants such as oil, paint and wet concrete from entering
          the stormwater system via stormwater drains and gullies. The control measures which
          must be considered to be adopted are:
              • Limit site access during construction to minimise disruption to traffic
              • Install a temporary construction entry/exit sediment trap at all site accesses to
                  minimise mud and sediment from the site being tracked onto public road,
                  particularly during wet weather or when the site is muddy.
              • Install and maintain appropriate sediment fences around construction areas
                      ▪ Divert clean stormwater runoff, using catch drains, around construction
                           areas to existing or new stormwater drainage system.
                      ▪ Install sandbags and other pollution containment devices around
                           stormwater drains and any other locations where required to prevent
                           sediment entering the trunk stormwater system.
                      ▪ Cover open earth/soil areas progressively (with concrete slabs and
                           pavements or mulch) to minimise areas of bare earth/soil.
                      ▪ Any stockpiles of excavated soil and demolition / construction waste must
                           be located where risk of erosion and sediment is minimal, and must be
                           protected from wind and water erosion.
              • Implement and maintain appropriate control measures such as catch drains and
                  sediment fences to prevent ponding of stormwater or discharge of stormwater
                  from the site to adjacent properties.


 Excellence with Economy in Engineering                                                                 16
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