RFI - Attachment 7 - Updated SWMP

Table 3-6: Bioretention and Raingarden Design Parameters
 Parameter                                                Bioretention Basin (55m2)     2 × Rain Gardens (5m2)
 Extended Detention Depth (m)                                       0.30                         0.20
 Storage Surface Area (m2)                                           55                          10
 Filter Media Area (m2)                                              55                          10
                                                                    0.01
 Unlined Filter Media Perimeter (m)                                                              0.01

 Saturated Hydraulic Conductivity                                   200
                                                                                                 200
 (mm/hr)
 Filter Depth (m)                                                   0.50                         0.50
                                                                    400
 TN Content of Filter Media (mg/kg)                                                              400

 Orthophosphate Content of Filter Media                              30
                                                                                                 30
 (mg/kg)
 Exfiltration Rate (mm/hr)                                          0.00                         0.00



3.3.        Results
MUSIC modelling of the proposed treatment train for the renovation work at Good Shepherd Lutheran
college was performed to ensure the WQO’s were achieved. Table 3-7 represents the load-based outputs
that are represented by this application. The results show the mitigated scenario, which achieves compliant
load reductions set out within Noosa Council’s 2020 Plan.

Table 3-7: MUSIC Results – Load Based Pollutant Outputs
                           Unmitigated          Mitigated          Reduction       Target
        Pollutant                                                                               Compliance
                             (kg/yr)             (kg/yr)          Achieved (%)    Reduction
            TSS                 2740                548                80             80%               ✓
             TP                 5.56                1.45              73.9            60%               ✓
             TN                 31.9                14.5              54.6            45%               ✓
             GP                  231                  0               100             90%               ✓




21-0211SMP01V1 | Stormwater Management Plan | Good Shepherd Lutheran College Arts Centre                    Page 14