Att 2 SWMP

Stormwater quality and protection of receiving waters Table 9.4.8.3 Criteria for assessment (part)
                          Performance Outcomes                                                                                     Acceptable Outcomes
Stormwater quality and protection of receiving waters
PO6                                                                                 AO6.1
Development is located, designed, constructed and operated to protect and
                                                                                    Stormwater runoff discharging into High Ecological Value waters as a result of development causes no increase in gross
enhance environmental values and water quality of waterways, wetlands, lakes,                                                                                                                                   N/A - stormwater does not discharge into high ecological value waters.
                                                                                    pollutants, total suspended solids, total phosphorous or total nitrogen compared to a pre-development scenario.
ground waters and drainage systems.

                                                                                    AND
Editor’s note: Environmental values of waters and water quality objectives are
prescribed in Schedule 1 of the Environmental Protection (Water) Policy 2009 and
are identified on the State Planning Policy Interactive Mapping System.
                                                                                    AO6.2
                                                                                    All stormwater runoff is treated to achieve maximum removal of nutrients, gross pollutants and suspended solids as
                                                                                    determined by cost to efficiency ratios. (e.g. bioretention basins must be sized to achieve at least 80% reduction in total
                                                                                                                                                                                                                Complies - refer to SWMP Quality section.
                                                                                    suspended solids, 60% reduction in total phosphorous, 45% reduction in total nitrogen and 90% reduction in gross
                                                                                    pollutants >5mm).

                                                                                    OR

                                                                                    AO6.3
                                                                                    Developments achieve a minimum 3 drop rating consistent with the Water by Design Living Waterways Scoring Guide
                                                                                                                                                                                                                N/A
                                                                                    (Healthy Land and Water).


                                                                                    Editor’s note— PSP6 Engineering Design Standards - Roads, Drainage and Earthworks provides guidance on stormwater
                                                                                    design and modelling requirements.

PO7                                                                                 AO7.1

                                                                              Water quality treatment systems are designed to be integrated into the landscape consistent with the technical design
Water quality treatment systems use natural processes and materials, whenever
                                                                              guideline published by Healthy Land and Water Water by Design for the feature. (eg. For Bioretention Basins:
possible, and are integrated into development to enhance biodiversity and                                                                                                                           Complies - Refer to SWMP for details.
                                                                              Bioretention Technical Design Guidelines (October 2014) and for Wetland Systems the Wetland Technical
landscape benefits.
                                                                              Design Guideline (May 2017).

PO8                                                                                 AO8.1
Water quality treatment infrastructure to be dedicated as public assets are
                                                                                    Detailed life cycle costing is provided for the entire treatment train system including replacement costs of asset parts.   N/A - no water quality treatment infrastructure is to be dedicated to council.
proven to be suitable for its use and of a cost effective and efficient standard.


                                                                                    AO8.2 Treatment systems dedicated as public assets are designed to minimise maintenance, renewal and adaption costs
                                                                                                                                                                                                        N/A - no water quality treatment infrastructure is to be dedicated to council.
                                                                                    and the requirement for specialised equipment, material or maintenance techniques.

                                                                                    AO8.3
                                                                                    Vegetated stormwater management systems to be dedicated as public assets are established and maintained during the
                                                                                    maintenance period to ensure optimal vegetated growth and that the functional elements of the system achieve the   N/A - no water quality treatment infrastructure is to be dedicated to council.
                                                                                    design function at the end of the maintenance period.

PO9                                                                                 AO9.1
                                                                                    Free draining inlets and outlets are provided to ensure that waters do not pond for more than 24 hours.                     To be complied with at detailed design in conjunction with the SWMP.
Treatment systems are designed to eliminate or minimise health, safety and
aesthetic hazards, including risks associated with insect breeding, odour and
public safety.
                                                                                    AO9.2
                                                                                    Developments are designed to eliminate retaining walls in excess of 0.8m for any water quality treatment device.            To be complied with at detailed design in conjunction with the SWMP.