2022-02-14 General Committee Meeting Minutes

GENERAL COMMITTEE MEETING MINUTES                                            14 FEBRUARY 2022


    104. Prior to the completion of the development, all site surfaces must be effectively
         stabilised. For the purpose of this condition, an effectively stabilised surface is defined
         as one that does not, or is not likely to result in visible evidence of soil loss caused by
         sheet, rill or gully erosion or lead to sedimentation, or lead to water contamination.
    Water Sensitive Design
    105. The active filter media of the bioretention device must be 27m². 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.
    106. 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.
    107. 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.
    108. Eighty percent (80%) of the catchment flowing to the bioretention basin must be
         effectively stabilised prior to the construction holdpoint for the Bioretention device.
    109. Prior to the release of the plan of survey, the supervising RPEQ must certify 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).
    Bioretention Devices - Landscaping
    110. 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
    111. 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.    Cared appressa
          b.    Carex fascicularis
          c.    Ficinia nodosa

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