Referenced Document - MCU30/0030 · MCU13/0030

                       BIORETENTION BASINS & SWALES

ISSUES               PROCEDURES


                                           Design Phase

Objective            To design low maintenance effective stormwater treatment devices to achieve a
                     no-worsening result over the existing pre-development situation in the creeks
                     adjacent the site.

Actions              Consulting Engineer to design Bioretention systems in accordance with:
                         )-   Bioretention Systems requirements as outlined in the "Water by Design    -




                              Bioretention Technical Guide/ines"Version 1 October 2012 prepared by
                              Healthy Waterways
                         )-   Calculations as per Music modelling Guidelines for South- East
                              Queensland Version1 December 2010.

                     Consulting Engineer is to ensure that the Bioretention systems are:
                         )-   located in a suitable area,

                         )-   sized according to guidelines,

                         )-   provided with the appropriate construction materials, subsoil drainage
                              and outlet pipe, and

                         )-   incorporated into a stormwater treatment system also including gross
                              pollutant traps, sediment traps etc.

Monitoring           Consulting Engineer to ensure that works drawings reflect requirements of this
                     Integrated Water Management Report.

Reporting            Consulting Engineer to provide Integrated Water Management Report with Works
                     documents.

                     Design Engineer to provide Works drawings to Developer in accordance with
                     requirements.

Incidents            The Bioretention systems are not approved according to submitted plans.


Corrective Actions   The Consultant will amend the design or placement of the Bioretention Systems
                     to reflect Developer requirements and design guidelines.

                     Major changes will require amendment to MUSIC model to assess whether
                     changes have affected treatment train effectiveness.
                     Amend treatment train characteristics to ensure that water quality objectives are
                     achieved.