C2. Eng Report

                                                     Proposed Service Station – 175 Eumundi Noosa Road, Noosaville
                                                                                  Ref: 20769 C R001 Rev 06 09.02.17
                                                                                                     February 2018

9.3.2    Bulk Earthworks Phase

         During the bulk earthworks phase, the following erosion and sediment control measure will need to
         be installed in addition to the aforementioned measures (Pre-Development Phase) to ensure there
         is minimal disturbance to downstream receiving water bodies:

            Construction chutes to control runoff over earthworks batters;

            Construction of temporary bunds at the top of all earthworks batters to ensure runoff is directed
            away from exposed batters;

            Sediment basins to be constructed at low points within each stage of the proposed development;

            Sediment fences to be installed on the downstream side of any stockpiles; and

            Stabilisation of all batters upon reaching the finished earthworks levels.

         All erosion and sediment control measures are to be designed and installed in accordance with IECA
         Guidelines. Further details regarding the proposed erosion and sediment control measures will be
         provided during the detailed design phase of the development.

9.3.3    Construction Phase

         During the construction phase of the development, there is a risk of sedimentation transport due to
         large areas of disturbed land. The following erosion and sediment control measure will need to be
         installed in addition to the aforementioned measures (Pre-Development and Bulk Earthworks
         Phases) to ensure there is minimal disturbance and the quality of runoff is maintained to an
         acceptable standard:

            Construction of temporary diversion drains to divert water to sediment basins;

            Construction of temporary diversion drains to divert water to protect bioretention and treatment
            devices as required;

            Sediment barriers to be installed on all entrances to newly constructed stormwater infrastructure
            (i.e. gully pits);

            Sediment fences to be installed on the downstream side of any stockpiles and batters; and

            Re-vegetation of all disturbed areas within two (2) weeks of completion.

         All erosion and sediment control measures are to be designed and installed in accordance with IECA
         Guidelines. Further details regarding the proposed erosion and sediment control measures will be
         provided during the detailed design phase of the development.

9.3.4    Maintenance

         All erosion and sediment control devices are to be maintained through the entire phase of the
         development leading up to the operational phase. Erosion and sediment control devices will need to
         be monitored closely throughout the entire project to ensure they are operating correctly and
         efficiently. No erosion and sediment control devices are to be removed unless otherwise authorised
         by a suitably qualified engineer or the site superintendent.

9.4      Operational Phase Treatment
         During the operational phase, it is proposed to have the inlet pits within the site equipped with
         StormSack’s (or approved equivalent) before discharging to the existing infrastructure within
         Easement EMT B on RP154227.


BRISBANE / SYDNEY / MELBOURNE / GOLD COAST / SUNSHINE COAST / DARWIN / PERTH                               Page 20