Attachment D - Stormwater Report · MCU18/0013

      Maintenance of ESC measures must occur in accordance with Table 5 below.

      Table 5 - ESC maintenance requirements.

                   ESC Measure               Maintenance Trigger                     Timeframe for
                                                                                     Completion of
                                                                                     Maintenance

          Sediment basins             When settled sediment exceeds            Within 7 days of the
                                      the volume of the sediment               inspection.
                                      storage zone

          Other ESC measures          The capacity of ESC measures             By the end of the day.
                                      falls below 75%.

      Sediment accumulation on ESC devices is to be removed and disposed of to the satisfaction of NSC.


6. Conclusion

      This SWMP outlines how stormwater runoff from the site will be managed in order to not adversely impact
      the receiving environment.

      Stormwater runoff from developed areas of the site shall be directed to a detention & infiltration tank with
      approximately 7m3 detention capacity at the rear of the site. Runoff from the tank shall discharge via either
      infiltration or shall surcharge and discharge east to Sunshine Beach as per existing conditions. The detention
      tank configuration shall ensure the peak flow rate and total runoff volume discharging to Sunshine Beach is
      reduced to pre-development levels. Final layout & configuration of the tank shall be confirmed at the detailed
      design phase.

      Stormwater treatment could be managed on site by first flush diverters directing runoff for irrigation of
      landscaped areas and/or the installation of field inlet pit inserts. Based on the scale of the proposed
      development, and typical pollutants produced, these measures are considered adequate.

      By implementing the proposed stormwater management system, and providing adequate maintenance, the
      downstream environment and neighbouring properties will not experience any adverse deterioration of water
      quality as a result of the proposed development.




                                       24 Arakoon Street, Sunshine Beach QLD 4567
Job No – S18-003                          STORMWATER MANAGEMENT REPORT                                           9