Response to Information Request - REC13/0015

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Following 24   Remove temporary cover of geotextile, topsoil and turf following:                                      Contractor         Following On-
month                                                                                                                                    maintenance or
                     .
                         Acceptance of bioretention systems on maintenance, or                                                           80% completion of
protection
period               .   80% completion of building works upstream of bioretention systems.                                              building works.
               Plant approved plantings into bioretention systems as per construction drawings.

               Contractor to conduct regular watering of all planted bio-retention systems until such time as
               plants are established.
               Maintain bioretention system for a minimum period of 12 months, until system is accepted Off-
               Maintenance.


Monitoring     Hold point   -
                             once bioretention basin   underdrainage pipe work is installed   -

                                                                                                  inspection with     Contractor and     Following
               Council to ensure in accordance with design.                                                           Council            underdrainage
                                                                                                                                         pipe work
               Sample drainage layer, transition layer, filtration media materials must be stockpiled on-site and
                                                                                                                                         installation
               certification that the filtration media complies with guidelines.

               The Contractor will carry out weekly inspections of the Bio-Retention Systems (Including during
                                                                                                                      Contractor
               the defects liability period). The following will be examined at each inspection:                                         Weekly
               );>   Sediment build up on the surface
               );>   Health of vegetation
               );>   Pondage during major storms not infiltrating into the sand
               );>   Erosion at the outlet
               );>   Pondage during minor storms
               One month after installation of plants in bioretention system:                                         Contractor
                                                                                                                                         One month after
               );>   Field test hydraulic conductivity in accordance with FAWB guidelines.                                               installation


Reporting      );>   Contractor to maintain a log of inspections, watering and other actions.                         );>   Contractor   );>   As required

               );>   Records are to be logged and kept for verification of compliance on a need basis.

               );>   Bio-retention designer I Engineer shall perform inspections during construction stage and fill
                     out Water by Design forms for compliance.