8. APP G. Engineering RFI Response

          CONCLUSION
          The Site Based Stormwater Management Plan has been prepared to provide a design proposal
          and guide to the stormwater quantity and quality management techniques for the proposed
          convenience centre site.

          The three primary objectives of this SBSMP have been to ensure that:

          1. Suitable measures are incorporated in the development to ensure that there are no
             adverse impacts to downstream receiving waterways, property or infrastructure
             resulting from any increase to peak discharging stormwater flow rates;
              This has been achieved by demonstrating that the proposed development does not
              increase runoff flows from Lot 4 on SP159610. Development on Lot 31 SP170751 involves
              the construction of a detention basin which will detain peak flow discharges to the existing
              level.
          2. Investigate flood issues affecting the site and set appropriate finished levels for the
             proposed development to ensure adequate flood immunity is achieved.
              This has been achieved by reviewing Council’s flood records. It was established that the
              site is not affected by flooding.
          3. Details of a proposed stormwater quality treatment train are provided to ensure the
             discharge of stormwater from the site is of adequate quality standards to comply
             with the requirements of Noosa Council and the South-East Queensland Healthy
             Waterways Partnership.
              This has been achieved by the provision of a proposed stormwater treatment train which
              has been specifically designed and verified to achieve the necessary objectives under the
              Water by Design ‘MUSIC Modelling Guidelines’ approach. The treatment train includes a
              bio-retention area prior to the three legal points of discharge on site.
              An assessment of the development against Noosa Council’s Stormwater Code has been
              provided in Appendix H.
              Additionally, an Erosion Hazard Assessment has been carried out which has identified that
              the site is ‘low’ risk under the Noosa Council assessment guidelines. It is proposed that
              appropriate Erosion and Sediment control devises and a detailed Erosion & Sediment
              Control Plan are implemented throughout the site during construction.
              This report has demonstrated that the design of the proposed development has taken all
              necessary steps to adopt Water Sensitive Urban Design principals in full compliance of the
              Queensland State Planning Policy (2013), the Environmental Protection (Water) Policy
              1997, and The Australian Guidelines for Urban Stormwater Management (ANZECC 2000).




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