Noosa Springs SMP_Rev 4 · OPW17/0612

ALTUM CONSTRUCTIONS
PRECINCT F & E2 NOOSA SPRINGS DEVELOPMENT




4.        STORMWATER QUALITY MANAGEMENT

4.1       Water Quality Design Objectives

          A conceptual stormwater quality treatment strategy has been developed in accordance
          with Condition 49 of the Precinct F decision notice (March, 2016) and draft approval
          condition received from council in relation to Precinct E2. Condition 49 identifies four
          possible requirements for demonstrating water quality treatment of runoff from the
          proposed development. The requirements for stormwater quality treatment as outlined in
          condition 49 are summarised below:

          1.   Where stormwater runoff from the site will enter the Noosa Springs Lake System:

               a) “MUSIC Modelling and calculations to demonstrate that concentrations of Total
                  Nitrogen, Total Phosphorus and prescribed water contaminants at risk of occurring
                  in runoff from the developed site will be no more than pre-development
                  concentration, or be of a concentration that is compatible to the water quality
                  needs of the lake system.”

               b) “Monitoring protocol to confirm that any nutrients or prescribed water contaminants
                  at risk of runoff from the development site is not responsible for adverse water
                  quality matters within the Noosa Springs Lake System.”

          2.   Where waters will bypass the Noosa Springs Lake System:

               a) “The design residence times of the Noosa Springs Golf Course lake system are
                  maintained.”

               b) “An 80% reduction in TSS, 60% reduction in Total Phosphorus and 45% reduction
                  in Total Nitrogen prior to discharge of water from the site.”

          The draft stormwater quality condition for Site requires a Stormwater Quality Management
          Plan must be submitted to council for approval. The SQMP must be prepared by a RPEQ
          experienced in water sensitive urban design and include the following information:

          1.   Details demonstrating the type, size and location of measures necessary to achieve
               the water quality pollutant reduction targets required by the State Planning Policy.

          2.   Water quality criteria necessary to be met to ensure the waters entering the receiving
               lake systems will not increase the likelihood of cyanobacteria blooms within lake
               systems.

          3.   Design requirements necessary to be incorporated into the development to ensure
               waters leaving the development meet the necessary water quality criteria.

          4.   Landscaping and fertilisation methods to prevent release of chemicals or fertilisers to
               receiving lake systems.



Job No. M7130_001                                                                               Page 5
                                                                                Rev 4 : 7 December 2017