MCU10/2083 Development Application part 2 - Attachment 7 - Stormwater Management Plan





5.0 OPERATIONALPHASEWATERQUALITYMANAGEMENT

5.1      INTRODUCTION

Inrecentyearstherehavebeenanincreasingnumberofinitiativestomanagetheurbanwatercycleinamore
sustainable way. The integration of the urban water cycle within the concept of Ecologically Sustainable
Development(ESD)istermedWaterSensitiveUrbanDesign(WSUD).AWSUDtreatmenttrainconsistingofthree
separate bioretention systems / rain gardens has been proposed to treat all stormwater flows from the
operationalphaseofthedevelopment.


5.2      POLLUTANTS

Pollutantstypicallygeneratedbyduringtheoperationalphaseofthedevelopmentareshownbelow(GoldCoast
CityCouncil,2005).
                                  Table9–OperationalPhasePollutantSources
                     Pollutant                               PotentialSource
                                                              Construction packaging, construction
                     Litter
                                                              wastematerials,paper,foodpackaging
                     Sediment                                Exposedsoilsandstockpiles
                     Oxygendemandingsubstances
                                                              Organicorchemicalmatter
                     (organic&chemicalmatter)
                     Nutrients                               Nitrogen,phosphorus
                     Pathogens/Faecalcoliforms
                                                              Sewage
                     (bacteria&viruses)
                     Heavymetals(oftenassociated
                                                              Sedimentrunoff
                     withfinesediment)
                     Surfactants(eg.detergentsfrom
                                                              Detergents,cleansingagents
                     carwashing)


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 –
Version1’.TheobjectivesdetailedinTable10alsocomplywiththeoutcomesoftheWaterSensitiveDesignCode
oftheSunshineCoastRegionalCouncil(NoosaPlan).
                               Table10OperationalPhaseWaterQualityObjectives
                         Pollutant                                PollutantReduction
                            SuspendedSolids                                         80%
                            TotalPhosphorus                                         60%
                            TotalNitrogen                                           45%




    SITEBASEDSTORMWATERMANAGEMENTPLAN–RevisionD   37GibsonRoad,Noosaville                                 Page 10



[OCR of page images]
JF

AU
URBANCONSULTANTS

 

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
Litt Construction packaging, construction
itter
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 .
a ; 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%

 

 

 

 

 

SITE BASED STORMWATER MANAGEMENT PLAN ~ Revision D 37 Gibson Road, Noosaville 10