Approved Plans - MCU18-0097 · MCU18/0097

                 GOOD SHEPHERD LUTHERAN COLLEGE                                                              ODYSSEY CONSULTING GROUP
                 Lot 30 on SP170751                                                               Conceptual Stormwater Management Plan
                 115 Eumundi Noosa Road, Noosaville                                                                     Project No: K4277

                 5.4      Operational Phase
                          The following sections provide details of the stormwater quality improvement devices (SQID’s)
                          proposed for the operational phase of the development. Odyssey Consulting Group, Stormwater
                          Management Plan (Ref: K4277/P007/G) and Odyssey Consulting Group, Stormwater Detention and
                          Bioretention Details (Ref: K4277/P010/E) included as Appendix F illustrates the size and location of
                          the proposed SQID’s.

                          MUSIC Version 6.3.0 has been used for modelling of the proposed treatment train.

                          Stormwater Quality Improvement Devices
                          Site runoff from Catchment A and B will be directed into bio-retention basins located at the West
                          (basin A) and South (basin B) of the site respectively. Catchment C will remain unchanged and will
                          bypass treatment and discharge direct to Council stormwater infrastructure. For further details see
                          Odyssey Consulting Group, Stormwater Management Plan (Ref: K4277/P007/G) included in Appendix
                          F. The proposed treatment train for the development is shown in Figure 4.




                          Figure 4:        Music Modelling Treatment Train

                          Design Parameters of the Stormwater Quality Improvement System
                          Detailed design of the stormwater treatment train shall be in accordance with the WSUD, Technical
                          Design Guidelines for South East Queensland – Version 1 (June 2006).

                          BIO-RETENTION BASINS
                          A bio-retention basin is designed to pond stormwater allowing it to percolate through a layer of filter
                          media, typically sandy loam. Runoff passing through the filter media is collected with perforated pipe
                          discharging to the downstream drainage infrastructure. The Bio-retention basins shall be located to
                          treat all stormwater from development area.

                          The bio-retention basins have been modelled with the following properties:

                                      Filter media                          Sandy Loam;
                                                                             5 – 10% Organic Content in            accordance      with
                                                                             AS1289.4.1.1;
                                                                             Average D50 0.45 mm;
                                                                             Ksat 180 mm/hr;
                                                                             TN Content = 400 mg/kg
                                                                             Orthophosphate Content = 20 mg/kg
                                      Filter media depth                    0.40 m;
                                      Drainage layer                        0.20 m;
                                      Extended detention depth              0.15 m;
                                      Seepage                               0 mm/hr;
                                      Filter Area                           Basin A: 34m2, Basin 2: 13m2;
                                      Surface Area                          Basin B: 55m2, Basin 2: 25m2.
                 K4277-0002-E                                           18 June 2019                                        Page 12 of 14
Document Set ID: 20894174
Version: 1, Version Date: 03/07/2019