Response to Information Request - Received on 19/04/2012 · OPW11/0335

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                    Modelling for the Stage 1 development predicted a 15% reduction in stormwater entering
                    Noosa National Park, from 13.1    MLlyear to 11.1 MLlyear. The annual load of total
                    suspended solids from the existing site (the caravan park) was predicted to be
                    approximately 2500 kg/year, whereas the annual load from stage 1 of the developed site
                    is reduced to 77 kg/year (Appendix B). Likewise, annual loads for total nitrogen reduce
                    from 34 kg/year to 18.1 kg/year and the annual load for total phosphorus reduces from
                    5.9kg/year to 1.81 kg/year (Appendix B).

                    Water       Quality      predictions             from        the   MUSIC       model            (Appendix B)          indicate         that
                    contributions of total suspended solids, nitrogen and phosphorus in treated stormwater
                    from the Stage 1   developed site (Table 6-3) comply with the required water quality
                    objectives (Table 3-1) and are not worse than the existing case (Table 6-2).


                    Table 6-3 MUSIC M odeI ResuIts                           -   Stage 1 S.t
                                                                                           I e
                                                                                                                                                         ,;i
                                     ,

                                         Water Quality Indicator                                                               Result

                     Estimated long-term load (kg/year)                                                  % reduction                 Load (kg/year)

                     Suspended Solids                                                                               77                         567

                     Total Phosphorus                                                                               69                         1.81

                     Total Nitrogen                                                                              46                            18.1


                     6.3.3       Full Development Modelling                             t~
                                                                                                  ,’.   t:    ~’j




                    Results of MUSIC modelling showed that there will be no net increase in stormwater
                                        Loads of sediment, total nitrogen and total phosphorus will be
                    runoff from the site.
                    substantially removed from                         stormwater       before      entering             the   Noosa     National         Park

                    (Appendix B).

                   Modelling for the fully developed site.predicted a 30 reduction in stormwater entering
                   Noosa National Park, from 19 MLlyear to 13.3 MLlyear. ’The annual load of total
                   suspended solids from the existil)g site (the caravan park) was predicted to be
                   approximately 2500 kg/year, whereas the annual load from the fully developed site is
                   451 kg/year (Appendix B). Likewise, the annual load for total nitrogen reduces from 34
                   kg/year to 20 kg/year and the annuan ad for tot l phosphorus reduces from 5.9kg/year
                   to 1.8 kg/year (Appendix B).


                    Water       Quality      predictions from the MUSIC                            model            (Appendix B)          indicate         that
                    contributions of total suspended solids, nitrogen and phosphorus in treated stormwater
                   from the developed site (Table 6-4) comply with the required water quality objectives
                    (Table 3-1) and are not worse than the existing case (Table 6-2).

                    Table 6-4 MUSIC ModeI Results                            -   FuIIIy Developed Site
                                                                                                                                          .
                                                                                                                                                   "


                                     Water Q        ality Indicator                                                            Result’

                     Estimated long-term load (kg/year)                                                 % reduction                  Load (kg/year)

                     Suspended Solids                                                                         88                               451

                     Total Phosphorus                                                                         79                               1.79

                     Total Nitrogen                                                                           56                               20.3




         @2012 Simmonds & Bristow Pty LId                                Contrast Constructions                                 J-1 005-31 0   _   22 March 2012
         I :ICLlENTFILESIContrast Constructionsl11 08-155c   -
                                                                 Essence of Peregian SCEP Stage 1 Updatel09  _
                                                                                                                 Output Documentsl11 08-155C SWM P
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         SCEMP_Scanlon Property Group_V4 O_ta_120321 ,doc                                                                                          Page 12 of 24