Referenced Document - MCU30/0030 · MCU13/0030

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                                                                                  Callaghan & Toth

4.3.1     Water Quality Objectives


This model meets the pollution load reduction target as detailed in Water by Design Deemed to
Comply Solutions Storm water Quality Management (South East Queensland) version 1.0-
                         -




Table A-2. The following have been included in Appendix 2.


          .       The treatment train effectiveness for the system.


          .       The MUSIC Version 5 Summary Report.


The information above indicates that the additions to the Karbara Centre and the proposed
stormwater treatment train will achieve reductions in pollutant loads as detailed in Table 4.2
below.


          TABLE 4.2:          COMPARISON OF LOAD REDUCTIONS


              Parameter                        MUSIC             POLLUTANT
                                            REDUCTION                  LOAD
                                               RESULT             REDUCTION
                                                                      TARGETS
              Flow                              32.8%
              Total Suspended Solids             86%                    80%
              Total Phosphorous                 60.8%                  60%
              Total Nitrogen                    65.9%                  45%
              Gross Pollutants                  100%


4.3.2 Assessment of Results


The developed site has been modelled as a series of commercial sub-catchments, which
incorporate Water Sensitive Urban Design (WSUD)treatment trains. Plan No’s 1303-02 shows
the proposed locations of the rainwater tank, bio-retention swale and bio-retention basin. The
reductions listed in Section 4.3.1 above comply with Council’s requirements. Therefore, it is
considered that the proposed stormwater treatment system is currently sufficient to reduce the
pollutants prior to exiting the site.




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1303, Kabara Hostel, Cooroy                 IWMP.doc                            January 2013