Response to Information Request - MCU12/0184

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                                                                                           Callaghan & Toth


APPENDIX 2                   -
                                 Preliminary Stormwater Quality Management Plan



                              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 "Waterby Design         -




                                      Construction and Establishment Guidelines"Version 1 dated February
                                      2009 prepared by Healthy Waterways

                                 }>   Calculations as per BBC Water Sensitive Road Design Guidelines.

                            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 operational works drawings reflect
                            requirements of this Integrated Water Management Report.
                            Council is to review the Operational Works Plan.


Reporting                   Consulting Engineer to provide Integrated Water Management Report with
                            Operational Works application.
                            Design Engineer to provide Operational Works drawings in accordance with
                            requirements.
                            Council is to review the Operational Works Plan and provide relevant
                            documentation relating to application.


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 Council’s 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.


                                               Construction Phase




                                                                                                               B

1209 Animal Husbandry   Top Forestry Rd, Ridgewood
                        -
                                                                                              SWQMP
April 2013