Information Response - Email 1 of 2 MCU16/0153 & REC16/0041

                                      STORMWATER MANAGEMENT PLAN
Client: Thomco (No 2087) Pty Ltd                             Location: 215 David Low Way, Peregian Beach

                                                Catchment     Catchment    Catchment
                                Source Node          A             B            C
                                                 Area (ha)     Area (ha)    Area (ha)
                                Treated Roof       0.123         0.142        0.138
                                Groundcover        0.051         0.142        0.100
                                   Road            0.123         0.000        0.337
                                   Total           0.297         0.284        0.584

4.5 Pollutant Reduction Results
MUSIC modelling of the proposed stormwater treatment strategy for the development was performed
to ensure the required load based pollutant load reduction objectives were achieved for the
development as a whole.
The target reductions in stormwater pollutants are based on a comparison of an unmitigated
scenario, having no treatment on site, and the mitigated scenario, which has stormwater treatment
measures incorporated onto the site. The results of the overall site MUSIC model can be found in
Table 5. Table 5 demonstrates that compliance has been met or exceeded for all of the required
pollutant load reduction objectives required by NSC and the SPP (2016).
           Table 5 – MUSIC Results – Treatment Train Effectiveness for the Overall Site
                                                             Reduction        Target
                           Unmitigated    Mitigated
      Pollutant                                              Achieved        Reduction   Compliance
                             (kg/yr)       (kg/yr)
                                                                (%)             (%)
          TSS                 2610             507             80.6              80            Y
          TP                  4.97             1.4             71.9               60           Y
          TN                  27.1             14.3            47.1               45           Y
          GP                  296               0               100               90           Y




Covey Associates Pty Ltd                               9                                 Project No: 162042
Consulting Engineers                                                                      100949Rpt Issue B