2503-45382 SRA - REPS Approved Plan and Documents

                                  STORMWATER MANAGEMENT PLAN

Client: Noosa Shire Council                                                                Location: Doonan


6.0      MAINTENANCE PERIOD
The proposed bioretention basins will require management during both the construction period and
maintenance period of the development. To establish vegetation and treatment functions in the bioretention
systems, the filter media will require protection from the common pollutants generated in the construction
phases of the development. During the operational phase, regular maintenance is required to ensure a
comprehensive vegetation establishment, a critical component in stormwater pollutant uptake. Section 6.1
provides details for the general maintenance periods and the requirements for the bioretention basins.

6.1     Bioretention Basins
6.1.1     ‘Construction Period’ Maintenance Requirements
Erosion and sediment control devices will be installed at the commencement of the works to capture and
treat runoff during construction works. The sediment control devices should be cleaned out as required and
at the end of the works. During the construction stage, all sediment control devices are to be inspected
weekly, after runoff generating rain events and prior and after prolonged site shutdowns (e.g. holiday
periods). Proposed bioretention basins may be excavated and used as a sediment basin, where appropriate.

Any sediment basin will require weekly inspection to prevent scour and sediment build up. Basins should be
inspected regularly and cleaned out when 1/3 rd full. At the completion of construction, the sediment basins
will be removed. The bioretention basin will be installed at the end of the construction phase when the site
is stabilised.
6.1.2    ‘Maintenance Period’ Maintenance Requirements
The bioretention basin on ground level may be temporarily turfed if required during the maintenance period.
Once construction of 80% of the site in the catchment of the development is complete, the turf will be
removed, and the basin will be vegetated appropriately.
6.1.3    ‘Operational Period’ Maintenance Requirements
Maintenance is to be carried out as needed to ensure continued functionality of the system. Maintenance
includes initial watering plants in new system, removal of litter or plant debris and reparation of eroded
areas.




                                                 10                                     Project No: 244035
                                                                                       M25-0042 Rpt Issue A