Decision Notice - Minor Change - OPW19 0203 03 [As Published] · OPW19/0203.03

                      e.      The property access must be located a minimum of 1m clear of existing power poles,
                              streetlights or other signage. The developer is responsible for any necessary relocation
                              of existing services to provide this clearance and must contact the relevant service
                              authorities and comply with their requirements in relation to these works.
                      Earthworks and Retaining Walls
               28.    All earthworks must be undertaken in accordance with conditions of Operational Works
                      approval OPW19/0098.
                      Stormwater Drainage
               29.    Appropriate scour protection must be provided at the outlet of all stormwater pipes including
                      temporary outlets.
               30.    Works associated with this permit must not adversely impact on the existing drainage
                      conditions on other properties (e.g. by blocking or interfering with natural overland flows).
               31.    Construction of all internal stormwater drainage works must comply with the relevant
                      section/s of Australian Standard AS/NZS 3500.3.
               Water Sensitive Design
               32.    Prior to the On-Maintenance inspection, 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).
               33.    During construction and establishment of the bioretention devices, the supervising RPEQ
                      must ensure that the device was constructed in accordance with the document Construction
                      and Establishment Guidelines: Swales, Bioretention Systems and Wetlands (Water by
                      Design, 2009) and that the forms contained in section 3.15, including the associated
                      supporting information and data, are completed. These forms and certification from the
                      RPEQ that the device has been constructed in accordance with the Construction and
                      Establishment Guidelines: Swales, Bioretention Systems and Wetlands (Water by Design,
                      2009), all conditions of approval, and the approved engineering drawings must be submitted
                      to Council prior to the On-Maintenance inspection.
               34.    A construction hold point with a council delegate shall 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 on-site.
                      Laboratory results must be provided for the filter media which demonstrate that the media
                      complies with the specifications contained in the latest version of the “Guidelines for Soil
                      Filter Media in Bioretention Systems” (produced by the Facility for Advancing Water
                      Biofiltration) and that the minimum hydraulic conductivity specified on the approved
                      engineering plans will be achieved. In addition laboratory results must be provided
                      demonstrating that the transition layer and drainage layer meet the following bridging criteria:
                      a.      D15 (drainage layer) ≤ 5 × D85 (transition layer);
                      b.      D15 (transition layer) ≤ 5 × D85 (filter media).
               35.    80% of the catchment flowing to the bioretention basin must be effectively stabilised prior to
                      the construction hold point for the Bioretention device.
               36.    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.
               37.    The active filter media of the bioretention device must be as per the approved design
                      drawings. 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.



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Document Set ID: 22809336
Version: 4, Version Date: 13/02/2024