Appendix C- Civil Engineering Report · MCU23/0135

WATER QUALITY & DRAINAGE CODE
Performance Criteria and Acceptable Solution
Noosa Civic Stage 2 Retail Development
29 September 2023

               PERFORMANCE OUTCOMES                                                ACCEPTABLE OUTCOMES                                                       RESPONSE

Stormwater quality and protection of receiving waters

PO6                                                                AO6.1                                                              Proposed stormwater design includes stormwater quality
Development is located, designed, constructed and operated         Stormwater runoff discharging into High Ecological Value           treatment to remove pollutants in accordance with the State
to protect and enhance environmental values and water              waters as a result of development causes no increase in            Planning Policy and Noosa Council requirements.
quality of waterways, wetlands, lakes, ground waters and           gross pollutants, total suspended solids, total phosphorous
drainage systems.                                                  or total nitrogen compared to a pre-development scenario.          Refer Stormwater Management Plan for further information.
                                                                   AND
Editor’s note: Environmental values of waters and water
                                                                   AO6.2
quality objectives are prescribed in Schedule 1 of the
Environmental Protection (Water) Policy 2009 and are
                                                                   All stormwater runoff is treated to achieve maximum removal
identified on the State Planning Policy Interactive Mapping
                                                                   of nutrients, gross pollutants and suspended solids as
System.
                                                                   determined by cost to efficiency ratios. (e.g. bioretention
                                                                   basins must be sized to achieve at least 80% reduction in
                                                                   total 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
                                                                   (Healthy Land and Water).

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




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