Appendix B - SWMP, Flood Cert & Form 15

            4.2.1.2. MUSIC modelling results

            The proposed treatment train for each site can achieve the required water quality
            improvements as shown below in Table 4.3 - MUSIC Modelling results and Table 4.4 -
            MUSIC Modelling results for 55 Doonella St.

                                 Table 4.3 - MUSIC Modelling results for 53 Doonella St.

                                                     Sources     Residual          Percentage     Percentage
                                                                 Load              Target         Reduction

             Total Suspended Solids (kg/yr)             91.311       5.45                  80        94.031

             Total Phosphorus (kg/yr)                    0.198      0.034                  60        82.596

             Total Nitrogen (kg/yr)                      1.335      0.464                  45        62.548

             Gross Pollutants (kg/yr)                   13.424        0                    90          100




                                 Table 4.4 - MUSIC Modelling results for 55 Doonella St

                                                     Sources     Residual          Percentage     Percentage
                                                                 Load              Target         Reduction

             Total Suspended Solids (kg/yr)            127.657      8.555                  80        93.299

             Total Phosphorus (kg/yr)                     0.27      0.056                  60        79.098

             Total Nitrogen (kg/yr)                      1.664      0.683                  45        58.935

             Gross Pollutants (kg/yr)                   16.331       0.00                  90        100.00




            4.2.2 Operational Maintenance

            Periodic maintenance and monitoring of the stormwater infrastructure proposed for this
            development shall be carried out to ensure they are operating effectively during the post-
            construction phase. After the on-maintenance period, the responsibility for these
            maintenance activities shall be the body corporate for the site.

            The field inlet grates, trench drains, pits and underground pipes shall be inspected for
            blockage or damage at least six monthly or after significant rainfall event. Any blockages
            shall be cleared from the system, and damage assessed to determine if it impacts on the
            function of the system or may pose a hazard that will require repair.




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