Stormwater Management Plan

6.4       Construction Phase (Sediment and Erosion Control)
6.4.1     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.

6.4.2 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.

6.4.3 Erosion and Sediment Control Measures
•    Obtain a licence or approval to operate activities that are classed as environmentally 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.
     –    Provision of spill / pollution control equipment that is readily accessible to clean up spills and
          leaks.
     –    Ensure spill/pollution control measures are available and maintained in working condition.

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Inspired engineering

22 May 2025
https://mpncnetau.sharepoint.com/sites/Administration/Shared Documents/10000-10999/10200-10299/10256/Report/22-05-25 SWMP_Issue A.docx