Appeal judgement 30-32 Doonella St Tewantin - MCU21-0013 OPW21-0013

      b.    Been revised by an RPEQ or CPESC to address the issues raised by changes in
            the projected construction schedule and/or methods;
      c.    Been revised to address predicted rainfall events, and
      d.    Achieve the desired environmental outcomes.
99.   Council may request further controls to be installed should the implemented measures
      be found inefficient.
100. The erosion and sediment control measures must be designed, installed and maintained
     in accordance with the supervising engineer instructions and the current best practice
     standards * (Refer to Advisory Note).
101. The developer must ensure non-essential exposure of soil is prevented by restricting the
     extent of disturbance and minimising the duration of soil exposure to adverse weather
     conditions and effectively turf, cover or stabilise any disturbed area without delay and
     prior to rainfall occurring.
102. The developer in conjunction with the engaged CPESC must ensure measures installed
     to divert the upstream water are designed and certified by the supervising RPEQ and
     installed prior to commencement of bulk earthworks.
103. The developer must ensure sediment does not leave the site or enter onto adjoining
     properties or Council’s drainage system due to surface runoff or on tyres of vehicles
     and/or machinery. It is essential to implement appropriate approved erosion and
     sediment control measures throughout the site during all phases of construction
     including vehicle shakedown pad/grid (or similar) at the access to the construction site.
     Where sediments or other contaminants are deposited on a road, they must be removed
     so as not to enter Council’s drainage system or waterways.
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.




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