Request for Further Information - 010.2007.00001259.001 [As Published] · 132007.1259

29.   Provide an ecologist’s assessment demonstrating that the proposed stormwater
      treatment train and measures will protect the natural ecosystem downstream of
      the development site.

30.   In relation to the stormwater tank re-use methodology, table 4.6 should show that
      the reuse connections for buildings A1, A2, B1, B2, B3, and C1 should be to
      toilets, swimming pool topping and irrigation and for the beach shacks for toilets
      and irrigation also. Please provide amended results with this in mind.

31.   It seems as that the annual runoff rates have been used in the tank balance
      model and not actual daily data. Considering the small size of the tanks there is
      probably a lot of overtopping in the larger events that would lead to water being
      lost to the system. There are probably long periods of time when the tanks are
      empty for example the beach shack tanks are only 3kL and have a re-use of
      210L/day meaning there is only 14 days supply in each tank. More information is
      required to support the water balance model.

32.   Justification of the assumption that rooftops will have 100% of the area drain to
      the tank. The report states that the pipes will be positioned to collect all the runoff
      but no details are provided and this may not be practical. The available
      stormwater industry guidelines indicate only 70% effective capture for rainwater
      tanks without detailed design of roof pitches coupled with simultaneous wind and
      rain data.

33.   Explain why the overflow from the rainwater tanks (uncontaminated) is required
      to be directed through the wetlands.

34.   Please provide a more detailed plan/s of the proposed stormwater system
      including (but not limited to) the layout and grades of stormwater pipelines and
      outlet/s, the location of the treatment devices and their sizing.

35.   Information regarding any existing stormwater systems to be removed or
      replaced particularly at the outlets and the location and type of proposed outlets.

Sewer Mains

36.   Provide the general sewer layout plan on the development site taking into
      consideration that no building or other structure requiring building permit will be
      allowed within the zone of influence of the sewer main. Sewer easements of
      minimum width of 3m in favour of Council in accordance the requirements of
      Planning Scheme Policy 6 – Water & Sewerage Design Standards will be
      required on all new sewer mains.

37.   It should noted that a new sewer to service existing connection to Lot 51
      SP156203, No.221 David Low Way (Peregian Hotel site) should be constructed
      along and within the northern and eastern boundary of the proposed
      development site to a point adjacent to Council sewer manhole MP20/02/09.
      Connection to be made to existing manhole by contractor approved by Noosa
      Shire Council.

General




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