Delegated Report - Code - Planning OPW25 0057 · OPW25/0057

                                       b)   From all disturbed areas of the site to sediment basin(s) without causing
                                            erosion
                      c.      Minimise sediment released from the site
                              i.       Prior to each rainfall event ensure concentrated stormwater flow paths are
                                       provided with capacity in accordance with IECA (2008) Table 4.3.1 and are
                                       structurally stable in all rainfall events for the following sources:
                                       a)   Each basin is sized and operated in accordance with either a Type-A or
                                            Type-B sediment basin as documented in IECA (2008) Appendix B (June
                                            2018).
                                       b)   Each basin is to be provided with an automated system of flocculent dosing
                                            and a suitable supply of flocculent/coagulant, with the type of
                                            flocculent/coagulant determined based on Chemical Coagulants and
                                            Flocculants Fact Sheet (IECA, 2018).
                                       c)   Markers are provided within each basin indicating the maximum sediment
                                            storage level and any additional water storage capacity for water reuse.
                                       d)   During discharge from the primary outlet system, the concentration of total
                                            suspended solids (“TSS”) discharged does not exceed 50mg/L and that pH
                                            is within the range of 6.5-8.5 unless entering a naturally acidic environment.
                              ii.      Install and maintain additional sediment control measures within the site, as
                                       necessary to maximise sediment capture.
                              iii.     Minimise the tracking of dirt from the site onto roadways. Ensure that all dirt on
                                       roadways caused by vehicles leaving the site is removed without causing water
                                       contamination, prior to rainfall and at least at the end of each work day.
               52.    Sediment and erosion control measures must be in place prior to works commencing. If such
                      measures are not in place or are not satisfactory, “on the spot” fines may be issued. Such
                      fines can be issued if sediments from the site are found to enter or have the potential to enter
                      Council’s stormwater system, natural waterways, any downstream stormwater filtration
                      system or adversely impacting on other properties. The sediment and erosion control design
                      and measures have NOT been approved, it is the site's Supervising Engineer who is
                      responsible for ensuring that the sediment and erosion control measures have:
                      a.      Been duly designed by an RPEQ or CPESC and constructed in accordance with "best
                              practise" methods,
                      a.      Been revised by an RPEQ or CPESC to address the issues raised by changes in the
                              projected construction schedule and/or methods,
                      b.      Been revised to address predicted rainfall events, and
                      c.      Achieve the desired environmental outcomes.
               53.    Earthworks and the implementation of erosion and sediment controls are undertaken in ways
                      which ensure flooding characteristics (including stormwater quantity characteristics) external
                      to the development site are not worsened during construction for all events up to and
                      including the 1% AEP (1 in 100 year ARI) event.
               54.    Drainage paths must be regularly inspected to ensure the sediment fences/measures are not
                      being bypassed as a result of sediment build up. Sediment laden runoff must be prevented
                      from leaving the subject site and entering neighbouring properties and/or stormwater
                      systems.
               55.    Soil exposure must be limited on the site to a distance of no more than 2m beyond the extent
                      of earthworks shown on the approved plans except where the exposed soil is effectively
                      stabilised without delay and prior to rainfall occurring.



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Document Set ID: 23977399
Version: 6, Version Date: 22/08/2025