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





                                     Table8ConstructionPhasePerformanceCriteria
                        Pollutant                       PotentialSource

                        TotalSuspendedSolids          90thPercentile<50mg/L

                        pH                              6.5–9.0

                        DissolvedOxygen                90thPercentile>80%saturationor6mg/L

                        Hydrocarbons                    Novisiblesheenonreceivingwaters

                        Litter                          Novisiblelitterwashedfromsite


4.4       MONITORINGANDMAINTENANCE

Thegeneralrequirementofmonitoringduringtheconstructionphasewillbe:

    ƒ Workactivitiesarerestrictedtodesignatedconstructionareas
    ƒ EarthworksandsiteclearingareundertakeninaccordancewiththeErosionandSedimentControlPlans
    ƒ Erosionandsedimentcontroldevicesaretobeconstructed/installedinaccordancewiththeErosionand
       SedimentControlPlans
    ƒ Inspectionofsedimentfencesanderosionandsedimentcontrolstructures/devicesonaweeklybasisas
       wellasafteranyraineventexceeding25mmin24hrs
    ƒ Stormwaterdischargesfromthesitearenothavinganyadverseaffectonthedownstreamenvironment
    ƒ Monitoring and recording of the performance of the drainage control devices including water quality
       testingwhererequired
    ƒ Any failure in the stormwater system shall be immediately rectified to prevent uncontrolled discharge
       fromthesite
    ƒ Any failure to the stormwater system causing damage to surroundings should implement immediate
       remedialworktothedamagedarea


4.5       RESPONSIBILITYANDREPORTING

      ƒ    Thecontractorshallberesponsibleformonitoringtheperformanceofalldrainagecontrolanderosion
           andsedimentcontroldevices
      ƒ    RecordsofanyfailurestodevicesshouldbekeptandreportedtotheConstructionManager
      ƒ    RegularinspectionsofthedevicesshallbereportedtotheConstructionManager
      ƒ    InspectionsofthedevicesafterheavyrainfallshallbereportedtotheConstructionManager
                                     




    SITEBASEDSTORMWATERMANAGEMENTPLAN–RevisionD      37GibsonRoad,Noosaville                            Page 9



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4.4

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URBANCONSULTANTS

 

Table 8 - Construction Phase Performance Criteria

 

 

 

 

 

 

Pollutant Potential Source

Total Suspended Solids 90" Percentile < 50mg/L

pH 6.5-9.0

Dissolved Oxygen 90" Percentile > 80% saturation or 6mg/L
Hydrocarbons No visible sheen on receiving waters
Litter No visible litter washed from site

 

 

 

 

MONITORING AND MAINTENANCE

 

The general requirement of monitoring during the construction phase will be:

4.5

Work activities are restricted to designated construction areas

Earthworks and site clearing are undertaken in accordance with the Erosion and Sediment Control Plans
Erosion and sediment control devices are to be constructed/installed in accordance with the Erosion and
Sediment Control Plans

Inspection of sediment fences and erosion and sediment control structures/devices on a weekly basis as
well as after any rain event exceeding 25mm in 24hrs

Stormwater discharges from the site are not having any adverse affect 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

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

 

SITE BASED STORMWATER MANAGEMENT PLAN — Revision D 37 Gibson Road, Noosaville 9