Decision Notice - Minor Change - MCU21 0228 01 & OPW21 0364 01 [As Published] · MCU21/0228.01

                      a.      Minimise Erosion
                              i.       For areas of the site which drain to a sediment basin, implement drainage and
                                       erosion control measures prior to rainfall which prevent or minimise rill erosion
                                       and gully erosion
                              ii.      For areas of the site which do not drain to a sediment basin, implement drainage
                                       and erosion control measures prior to rainfall (including contingency measures)
                                       which prevent or minimise erosion, including rain drop erosion, chemical erosion,
                                       rill erosion and gully erosion
                              iii.     Prior to the final inspection for the development, all site surfaces must be
                                       effectively stabilised using methods which have achieved effective short-term
                                       stabilisation and which will continue to achieve effective stabilisation in the
                                       medium to long-term. For the purpose of this condition, an effectively stabilised
                                       surface is defined as one that does not, or is not likely to result in visible evidence
                                       of soil loss caused by sheet, rill or gully erosion or lead to sedimentation, or lead
                                       to water contamination.
                      b.      Manage concentrated stormwater flows
                              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)        From stormwater catchments upslope of the area of disturbance
                                             which are either stable or external to the site, ensure stormwater is diverted
                                             or managed either:
                                             i.    around the site or through the site without causing erosion and
                                                   without contaminating the flow; or
                                             ii.   if it is impractical to convey the flows around or through the site,
                                                   convey the flows into appropriately sized sediment basins without
                                                   causing erosion
                                       (b)   From all disturbed areas of the site to sediment basin(s) without causing
                                             erosion
                      c.      Minimise sediment released from the site
                              i.       Install and maintain additional sediment control measures within the site, as
                                       necessary to maximise sediment capture.
                              ii.      Minimise the tracking of material from the site onto roadways. Ensure that all
                                       material 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.
               69.    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,
                      b.      Been revised by an RPEQ or CPESC to address the issues raised by changes in the
                              projected construction schedule and/or methods,
                      c.      Been revised to address predicted rainfall events, and
                      d.      Achieve the desired environmental outcomes.


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Document Set ID: 22822522
Version: 4, Version Date: 21/02/2024