Minor Change - MCU17 0568 01 & OPW17 0602 01 [As Published]

                      Water Sensitive Design
               59.    Prior to release of survey, the supervising RPEQ must certify that all hardstand areas of the
                      development drain to a bioretention device designed and constructed in accordance with all
                      relevant conditions of this approval, the Water by Design Bioretention Technical Design
                      Guidelines, relevant aspects of the IPWEAQ Standard Drawing WSUD-drawing series and
                      Construction and Establishment Guidelines: Swales, Bioretention Systems and Wetlands
                      (Water by Design, 2009).
               60.    During construction and establishment of the bioretention devices, the supervising RPEQ
                      must certify forms contained in section 3.15 of the Construction and Establishment
                      Guidelines: Swales, Bioretention Systems and Wetlands (Water by Design, 2009). These
                      forms and certification must be submitted to council prior to the sealing of the survey plan.
               61.    The active filter media of the bioretention device must be 130m2. Active filter media area is
                      the area of the bioretention basin surface that is not covered by any impermeable structure
                      such as a sediment forebay, riser, etc.
               62.    A construction hold point with a council delegate must be established once the bioretention
                      device underdrainage pipe work is installed. At the time of inspection, a sample of the
                      drainage layer, transition layer, and filtration media materials must be stockpiled onsite
                      accompanied by laboratory results that demonstrate that the media complies with the
                      specifications contained in the latest version of the Guidelines for Soil Filter Media in
                      Bioretention Systems (Facility for Advancing Water Biofiltration) and that the minimum
                      hydraulic conductivity of 180mm/hr or as specified on the approved engineering plans will be
                      achieved. The drainage layer, transition layer, and filtration media materials shall not be
                      installed until the catchment draining to the bioretention device has 80% groundcover as
                      determined by council’s delegate.
               63.    80% of the catchment flowing to the bioretention basin must be effectively stabilised prior to
                      the construction hold point for the Bioretention device.
                      Bioretention Devices - Landscaping
               64.    Landscape plans must include a mixture of at least five of the following species for planting
                      in the bioretention basin extended detention surface at a minimum density of 8 plants/m2:
                      a)      Carex appressa
                      b)      Carex fascicularis
                      c)      Ficinia nodosa
                      d)      Juncus usitatis
                      e)      Lomandra longifolia
                      f)      Ghania sieberiana
               65.    Landscape plans for the areas surrounding the bioretention basin filter media footprint must
                      be arranged to minimise shading to the filter media footprint are. Suitable plants include the
                      following:
                      a)      Carex appressa
                      b)      Carex fascicularis
                      c)      Ficinia nodosa
                      d)      Juncus usitatis
                      e)      Lomandra longifolia
                      f)      Ghania sieberiana
                      g)      Banksia robur
                      h)      Dianella brevipendunculata
                      i)      Themada triandra
                      j)      Cymbopogan refractus
                      k)      Melaleuca thymifolia




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Document Set ID: 22608628
Version: 4, Version Date: 05/10/2023