1209 SWQMP Report_3 2013

                                                                                     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:
                              ¾   Bioretention Systems requirements as outlined in the “Water by Design –
                                  Construction and Establishment Guidelines” Version 1 dated February
                                  2009 prepared by Healthy Waterways
                              ¾   Calculations as per BBC Water Sensitive Road Design Guidelines.
                         Consulting Engineer is to ensure that the Bioretention systems are:
                              ¾   located in a suitable area,
                              ¾   sized according to guidelines,
                              ¾   provided with the appropriate construction materials, subsoil drainage
                                  and outlet pipe, and
                              ¾   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.




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1209 Animal Husbandry – Top Forestry Rd, Ridgewood                                  SWQMP_REV_3
SEPTEMBER 2013