Item 11 Appendix E - Stormwater Management Plan-1.0 · MCU22/0094

 20 May 2022


Treated water will discharge off site via a proposed stormwater connection. The treatment plan for
the proposed development is depicted on MPN Plan 9307-DA.02 attached in Appendix 3, with
MUSIC excerpt in Figure 3.




                                                  Figure 3 – Treatment Plan

5.4.3.7 MUSIC Results
The resulting percentage-based load reductions at the outlet are shown in Table 4 below together
with the Water Quality Objectives for the receiving waters.


                                                                          Residual
                                                    Sources                             % Reduction   Target %
                                                                             Load


 Total Suspended Solids (kg/yr)                        407                    78.2         80.5         80

 Total Phosporous (kg/yr)                              1.08                  0.307         71.8         60

 Total Nitrogen (kg/yr)                                9.86                   4.69         48.0         45

 Gross Pollutants (kg/yr)                              70.7                   1.54         97.8         90
                                Table 4 – Percentage Based Load Reduction Results

5.4.3.8 POD Pollutant Reduction

5.4.3.8.1         Litter
Rubbish bins will be located within the on-site bin store, for use by staff and visitors. The carparks
will be cleaned regularly. As a result of this and with the installation of the treatment devices, levels
of litter exiting the site via stormwater are expected to be negligible.




 Excellence with Economy in Engineering                                                                          11
 l:\9000-9999\9300-9399\9307\reports\20-05-22 stormwater management plan_issue a.docx