Minor Change Existing Approval MCU21 0117 02 & OPW21 1099 02 (As Published) · OPW21/0199.02

               86.    For the length of stormwater line being installed under the existing Pearl St pavement, the
                      trench reinstatement works must be generally in accordance with Councils standard drawing
                      RS-170.
                      Bioretention Basins - Construction
               87.    During construction and establishment of the bioretention devices, the supervising RPEQ
                      must ensure that the device was constructed in accordance with the document Construction
                      and Establishment Guidelines: Swales, Bioretention Systems and Wetlands (Water by
                      Design, 2009) and that the forms contained in section 3.15 including the associated
                      supporting information and data are completed. These forms and certification from the RPEQ
                      that the device has been constructed in accordance with the Construction and Establishment
                      Guidelines: Swales, Bioretention Systems and Wetlands (Water by Design, 2009), all
                      conditions of approval, and the approved engineering drawings must be submitted to Council
                      prior to commencement of use.
               88.    Where the bioretention filter media interfaces with stormwater pits and retaining walls non-
                      woven geotextile shall be fixed to the pit / retaining wall and extend 300mm out into the filter
                      media generally in accordance with IPWEAQ Standard Drawing No. DS-070 to prevent
                      tunnelling of water along the interface.
               89.    Prior to issuing of a final compliance certificate, Council must receive evidence that the
                      results for the in-situ hydraulic conductivity testing conducted in accordance with FAWB
                      PRACTICE NOTE 1: In Situ Measurement of Hydraulic Conductivity Belinda Hatt, Sebastien
                      Le Coustumer April 2008 for the bioretention filter media achieve the design criteria.
                      Erosion and Sediment Control
               90.    Prescribed Water Contaminants (as defined in Schedule 10 of Environmental Protection
                      Regulation 2019) must not be released from the site or to waters within the site, or be likely
                      to be released should rainfall occur, unless all reasonable and practicable measures are
                      taken to prevent or minimise the release and concentration of contamination.
               91.    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.
                      Council may request further controls to be installed should the implemented measures be
                      found inefficient.
               92.    The erosion and sediment control measures must be designed, installed and maintained in
                      accordance with the supervising engineer instructions and the current best practice
                      standards * (Refer to Advisory Note).
               93.    The developer must ensure non-essential exposure of soil is prevented by restricting the
                      extent of disturbance and minimising the duration of soil exposure to adverse weather
                      conditions and effectively turf, cover or stabilise any disturbed area without delay and prior
                      to rainfall occurring.




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Document Set ID: 24681870
Version: 7, Version Date: 17/04/2026