2019-06-05 Special Meeting Agenda

SPECIAL COMMITTEE MEETING REPORT                                                        5 JUNE 2019


      f.    The bioretention system must be formed with batters and not walls and include a
            minimum width of 5 metres.
      g.    Unless directed otherwise by Council, the detention tank will be covered.
      h.    The plan shall include detailed information in relation to the following aspects of the
            design of the bio-retention system:
             i.    calculations of underdrainage requirements for the bio-retention system;
             ii.   filter media composition requirements;
            iii.   a schedule which details how the construction, establishment, certification and
                   various inspections associated with each treatment measure relate to other civil
                   works;
            iv.    Where bioretention basins are used for stormwater quality treatment, the design
                   must be consistent with all aspects of the Water by Design (2014) Bioretention
                   Technical Design Guidelines Version 1.1) Healthy Waterways Ltd Brisbane,
                   including for free draining outlets to and from the bioretention basins, and include
                   completed copies of the design check and summary contained within that
                   document to confirm free draining outlets, within reasonable construction
                   tolerance capabilities are achieved; and
             v.    presentation of groundwater testing results which demonstrate that all parts of
                   the treatment measures are located above seasonal high groundwater levels.
            A copy of the detailed civil drawings for the bio-retention system must be included as
            an appendix to the plan.
      i.    The plan must include a comprehensive Maintenance Plan for the detention tank and
            the bioretention system including the frequency of cleanout, methods of cleanout, and
            general maintenance. The plan will include the requirement for regular inspections and
            the keeping of records (to be maintained and made available to Council upon request).
            The plan is also to stipulate that all necessary improvements are required to be made
            immediately upon awareness of any deficiencies in the treatment measure/s. The
            detention tank is to be capped and trafficable.
      j.    The plan shall include details the costs of maintenance (including periodic replacement
            of filter media) over the life of the asset.
22.   The Maintenance Plan (including costing) must be included in any Community Management
      Statement for the site.
23.   The Body Corporate for the site must enter into a contract with a suitably qualified
      contractor(s) for the maintenance of the stormwater quantity and quality devices and provide
      evidence of both the contract and execution of the contract upon request by Council.
24.   Prior to the commencement of use, certification is to be submitted to Council from a suitably
      qualified stormwater quality specialist to verify that the bioretention works have been
      constructed generally in accordance with the approved civil works plans, conditions of
      approval and relevant sections of the Construction and Establishment Guidelines: Swales,
      Bioretention Systems and Wetlands (SEQ Healthy Waterways Partnership). Council
      approval of the constructed stormwater management system is required prior to
      commencement of use.
25.   Certification is required to include all relevant items noted in Construction and Establishment
      Guidelines: Swales, Bioretention Systems and Wetlands (SEQ Healthy Waterways
      Partnership) including completed and signed forms.
      Acid Sulfate Soils
26.   The application for operation works must include an Acid Sulfate Soil and Groundwater
      Management Plan for the development prepared by a suitably qualified person and in

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