Referenced Document - REC13/0015

             Undertake general maintenance such as:

                 ~   Remove accumulated litter / debris
                 ~   Remove accumulated sediments
                 ~   Remove weeds and dead plants
                 ~   Replace plants where necessary
                 ~   Water plants if necessary
                                                                                                                   Council      Every ten years
                 ~   Control erosion and sediment loss upstream or within system where necessary.

             Routine clean outs of bio-retention systems should be planned on a ten-yearly basis.


Monitoring   The Council Landscape Gardener will carry out six monthly inspections of the Bio-Retention            Council      Six monthly
             Systems. The following will be examined at each inspection:
                 ~   Sediment build up on the surface under the river stones
                 ~   Health of vegetation
                 ~   Pondage during major storms not infiltrating into the sand
                 ~   Erosion at the outlet
                 ~   Pondage during minor storms
                                                                                                                   Contractor   Two years after
             Two years after plants are established in bioretention system:
                                                                                                                                installation
             Undertake field testing of hydraulic conductivity of filter media to assess impact of vegetation on
             hydraulic conductivity, in accordance with FAWB guidelines.
                                                                                                                                Biennial
             Test hydraulic conductivity every two years, in accordance with FAWB guidelines.                      Council


Reporting    Inspection Records are to be logged and kept for verification of compliance on a need basis.          Contractor   As required

             Records of any maintenance are to be logged and kept on site.

             Records of environmental incidents and corrective actions should be kept on site and Council
             notified of any problems.


Incidents    Sediment builds up on the surface.

             The vegetation dies off.

             Pondage of water is in excess of one hour.
             Excessive erosion occurs within the system.

             Pondage of water occurs at every minor rainfall event.