Stormwater Management Plan - Rev 1

                                                                                     20169 - SBSMP/1
                                                                                                 Page 15




6.3.2 Proposed Treatment Train
The proposed treatment train has been modelled using the following methodology:

    1. Roofwater from Townhouse Units 1-8 will be collected by a 15kL rainwater reuse tank with
       overflow to the Eumundi Noosa Road kerb and channel.

    2. Roofwater from the rest of the proposed development will be collected by the internal
       drainage network which will subsequently direct flow to the end-of-line stormwater quality
       treatment quality treatment device.

    3. Surface runoff from the hardstand areas and landscaping areas will be collected by various
       pits containing litter baskets. The internal drainage networks will subsequently direct flow
       to the end-of-line stormwater quality treatment quality treatment device.

All runoff described above will then discharge to the lawful point of discharge. A Concept Site
Levels and Drainage Plan of the proposed internal drainage network detailing the treatment train
assets is included in Appendix F. Refer to Table 6.5 for details of the proposed treatment train
assets.

                                Table 6.5- Proposed Treatment Assets

          Treatment          Treatment
                                                                    Description
            Level              Asset

                                                   8 x SPEL Environmental Stormsack litter
                                                   baskets will be installed within the
           Primary         Litter Baskets
                                                   stormwater pits in the hardstand pavement
                                                   areas.

                          Rainwater Reuse
           Primary/                                15kL tank installed at the north western
                          Tank (Landscape
          Secondary                                corner of the site.
                           Irrigation Only)


          Primary/
                        Secondary/Tertiary         1 x 8-cartridge SPEL Environmental (EMC 45)
         Secondary/
                        Treatment Devices          SPELFilter system within a precast chamber.
          Tertiary


Refer to Appendix J for the Stormwater Quality Operation Management and Maintenance
Guidelines.

6.3.3 Pollutant Export Modelling
Following the definition of water quality objectives for the site and an assessment of the treatment
options suitable for the development, the most appropriate treatment scheme for the site was
identified. The impact of the stormwater management strategy on the quality of stormwater runoff
discharged from the site has been assessed using the pollutant export model, Model for Urban
Stormwater Improvement Conceptualisation (MUSIC).




Site Based Stormwater Management Plan
Proposed Townhouse Development at 101-105 Eumundi Noosa Road, Noosaville