MCU21.0117 OPW21.0199-Att 5 Stormwater · MCU21/0117

                    1. Sediment fencing is to be installed along the northern and eastern boundaries of the
                       site to capture sediment from leaving the site. Drainage paths will be inspected to
                       ensure the sediment fences are not being bypassed as a result.

                    2. A shakedown area is to be installed at the construction entry/exit to the site to
                       minimise sediment being transported to and from the site.

            In addition to these measures, stockpiles and construction materials will not be stored within
            the road reserve and shall be contained using sediment fencing downstream of these areas.
            Turfed diversion swales will be provided at upstream boundaries to reduce flows to
            earthworks areas and sediment disposal from the site shall be undertaken to the satisfaction
            of Noosa Shire Council.

                        4.1.2 Erosion and Sediment Control Monitoring

            The control measures described above will be maintained in an effective operational
            condition during the construction works. Regular inspections will be carried out by the
            contractor and any defects in the erosion and sediment control devices specified will be
            remedied as soon as practicable. Inspections (in accordance with SPP 2017) are to be
            carried out as follows:

                             1. Routine Inspection – is to be carried out daily while work is being carried out
                                on site, or weekly while works are not being carried out.
                             2. Preventative inspection – to be carried out a maximum of 24 hours before
                                rain is forecast.
                             3. Reactive inspection – to be carried out within 18 hours of a rainfall event
                                sufficient to mobilise surface sediment on the site.

            Documentation of any defects will also be carried out in accordance with SPP 2017, which
            includes recording the date the defect was identified, a description of the defect, the
            cause of the defect and measures that can be implemented to reduce the likelihood of the
            defect reoccurring. Once the device has been repaired, the date of repair and the solution
            implemented will also be recorded in the documentation. An example template for this
            documentation has been provided in Appendix C Example ESC Defect Documentation
            Template.


                    4. 2. O P E R A T I O N A L P H A S E

            The development is to comply with the Noosa Council Water Quality and Drainage Code,
            AO6.2 which states:

            “All stormwater runoff is treated to achieve maximum removal of nutrients, gross pollutants
            and suspended solids as determined by cost to efficiency ratios. (e.g. bioretention basins
            must be sized to achieve at least 80% reduction in total suspended solids, 60% reduction in
            total phosphorous, 45% reduction in total nitrogen and 90% reduction in gross pollutants
            >5mm).”

            It is proposed that the following measures to be implemented will provide the required
            level of stormwater quality improvement to minimise impacts to the downstream network:


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