Appendix C - Stormwater Management Plan

TfA Project Group Pty Ltd                                                                         Stormwater Management Plan
                                                                                                       Development Application




   7.1.2      Performance objectives
   The objectives are:
          •   Minimise the amount of sediment entering Noosavilley’s waterways and stormwater drains;
          •   Minimise or prevent environmental harm to the City’s waterways and associated ecosystems;
          •   Minimise localised flooding caused by sediment runoff;
          •   Minimise exposure of soils.


   Table 17: Construction phase performance criteria

     Indicator                                                        Water Quality Objectives
     pH                                                               6.5 – 8.5
     Suspended Solids                                                 Annual Mean < 10mg/L
     Oils and Grease                                                  No visible films or odour
     Litter/ Gross pollutants                                         No anthropogenic (man-made) materials greater than
                                                                      5mm in any dimension
     Dissolved oxygen                                                 80-100% saturation


   7.1.3      Monitoring and Maintenance


   The general requirement of monitoring during the construction phase will be:
          •   Work activities are restricted to designated construction areas;
          •   Earthworks and site clearing are undertaken in accordance with an Erosion and Sediment Control Plan;
          •   Erosion and sediment control devices are to be constructed/installed in accordance with an Erosion and
              Sediment Control Plan;
          •   Inspection of sediment fences, erosion and sediment control structures/devices on a weekly basis as well
              as after any rain event exceeding 25mm in 24hrs (major storm event);
          •   Stormwater discharges from the site are not having any adverse effect on the downstream environment;
          •   Monitoring and recording of the performance of the drainage control devices including water quality
              testing where required;
          •   Any failure in the stormwater system shall be immediately rectified to prevent uncontrolled discharge
              from the site;
          •   Any failure to the stormwater system causing damage to surroundings should implement immediate
              remedial work to the damaged area.


   7.1.4      Responsibility and Reporting
          •   The contractor shall be responsible for monitoring the performance of all drainage control and erosion and
              sediment control devices;
          •   Records of any failures to devices should be kept and reported to the Construction Manager;
          •   Regular inspections of the devices shall be reported to the Construction Manager;
          •   Inspections of the devices after heavy rainfall shall be reported to the Construction Manager;




                            123 Eumundi Road (Cnr Walter Hay Drive), Noosaville QLD 4566                                    Page 9