Referenced Document - REC13/0015

Incidents         The Bio-Retention Zones are not approved according to submitted plans.


Corrective        The Consultant will amend the design or placement of the Bio-Retention Zones to reflect              Design Engineer   As required
Actions           Council’s requirements and design guidelines.

                  Amend MUSIC model to assess whether changes have affected treatment train effectiveness.

                  Amend treatment train characteristics to ensure that water quality objectives are achieved.




                                                                   CONSTRUCTION PHASE


Objective         The Contractor will install the Bio-Retention Systems in accordance with the Operational Works
                  drawings, including:
                      .   Bioretention Basin   (25m2)


Actions           Description                                                                                          Responsibility    Timing

Up to             Construct bioretention systems in accordance with steps as detailed in "Water by Design       -
                                                                                                                       Foreman           During civil works
installation of   Construction and Establishment Guidelines: Swales, Bioretention Systems and Wetlands"
filter media      Version 1 dated February 2009.

                  Supervising RPEQ complete Bioretention Construction and Establishment Sign-Off Forms from
                  Water by Design 2009 and submitted to Council prior to On-maintenance.

                  Bioretention systems to be constructed at the end of civil works for the development.

                  Bioretention basin areas used for sediment basins during civil works construction shall have
                  sediments removed prior to layout of bioretention system, drainage media and filter media.

                  Contractor to ensure bioretention systems are protected from sediment laden stormwater runoff
                  during construction period or only install once upstream catchment is stabilised.
                  Following installation of filter media, install temporary cover of geotextile covered with topsoil
                  and turf. This temporary cover will provide protection to Bioretention Basin and Bioretention
                  Swales filter media during building works occurring on site.