MCU10/2083 Information Request Response 37 Gibson Rd Noosaville

      5.1   INTRODUCTION

      In recent years there have been an increasing number of initiatives to manage the urban water cycle in a more
      sustainable way. The integration of the urban water cycle within the concept of Ecologically Sustainable
      Development (ESD) is termed Water Sensitive Urban Design (WSUD). A WSUD treatment train consisting of three
      separate bio-retention systems / rain gardens has been proposed to treat all stormwater flows from the
      operational phase of the development.



      5.2   POLLUTANTS

      Pollutants typically generated by during the operational phase of the development are shown below (Gold Coast
      City Council, 2005).
                                              Table 9 - Operational Phase Pollutant Sources

                         Pollutant                                 Potential Source
                                                                   Construction    packaging,     construction
                         Litter
                                                                   waste materials, paper, food packaging

                         Sediment                                  Exposed soils and stockpiles

                         Oxygen demanding substances
                                                                   Organic or chemical matter
                         (organic & chemical matter)

                         Nutrients                                 Nitrogen, phosphorus

                         Pathogens / Faecal coliforms
                                                                   Sewage
                         (bacteria & viruses)
                         Heavy metals (often associated
                                                                   Sediment runoff
                         with fine sediment)
                         Surfactants (eg. detergents from
                                                                   Detergents, cleansing agents
                         car washing)



      5.3   OBJECTIVES

      Table 10 outlines the stormwater pollutant reductions required for the subject site as stipulated within the
      Healthy Waterways 'Water Sensitive Urban Design Technical Design Guidelines for South East Queensland -
      Version 1'. The objectives detailed in Table 10 also comply with the outcomes of the Water Sensitive Design Code
      of the Sunshine Coast Regional Council (Noosa Plan).
                                        Table 10 - Operational Phase Water Quality Objectives
                                  Pollutant                                 Pollutant Reduction
                                  Suspended Solids                                   80%

                                  Total Phosphorus                                   60%
                                  Total Nitrogen                                     45%




III    SITE BASED STORMWATER MANAGEMENT PLAN - Revision E              Road, Noo                                     10