Appendix C - Ecological Assessment

       *(Refer to Advisory Note)
71.    An easement In favour of Council for drainage purposes must be registered against
       the lilies of the properties over the land area identified as being below the 1 In 100
       year ARI flood level on the subject site and over all stormwater quality improvement
       devices on private allotments. Areas covered by vegetation covenant are to be
       exclllded from the easement.
72.    The easement must be granted at no cost lo Council. The wording of the easement
       documentation must be in accordance wilh Council's standard easement document.
       Draft. easement documentation must be submitted to Council for endorsement.
73.   No structures, including solid-type fences are to be located within areas of the
      allotment covered by drainage easement. No excavation, filling, or drainage works
      are to be commenced on an easement without prior written consent of Council.
      Maintenance of the area of the allotment covered by drainage easement rests with
      the landowner or occupier.
      Stormwater
74.    Concurrent With any application tor Operational Works relating to this development, a
       detailed Integrated Water Management Plan must be prepared by a suitably
       experienced Registered Professional Engineer of Queensland (RPEQ) or equivalent.
      All water management and drainage systems must be designed In accordance with
      the detailed Integrated Water Management Plan and demonstrate compliance wHh
      the water quality objectives being total suspended solids (median) < 20 mg/L, total
      phosphorous (median( < 0.05 mg/L and total nitrogen (median) <0.5 mg/L OR meet
      the following load based reduction targets 80% total suspended solids removal, 60%
      total phosphorous removal and 45% total nitrogen removal. Compllance with water
      quality objectives shall be demonstrated using the MUSIC model.                 When
      demonstrating compliance with concentration based objectives, flows less than 10L/s
      shall be excluded from calculation of the median concentration. The concentration /
      load from each lot shall be representative of a lot containing an on site effluent
      treatment system. The detailed Integrated Waler Management Plan must also be in
      accordance with the follOwing:
      (a)     The latest Water Sensitive Urban Design Technical Design Guidelines
              published by Healthy Wateiways I Water by Design;
      (b)     Queensland Urban Drainage Manual; and
      (c)     Australian Runoff Quality.
75.   A stormwater quality treatment system must be provided for the development. The
      works must be undertaken In accordance With an Operational Works approval and
      the latest version of the Water Sensitive Urban Design Technical Design Guidelines
      for South East Queensland and the Water by Design Bioratention Technical design
      Gulde/Ines, and must Include In particular:
      (a)     Swales and bloretentlon swales which:
              (l)     must In accordance with the detailed Integrated Water Management
                      Plan;
              (Ii}    Stormwater from Lot 4 to 13 must be treated In swales / bloretention
                      swales located wlthin the allotment;
              (iii)   Stormwater from Loi 50 to 52 does not require treatment and must
                      not be included In the MUSIC model;
              (Iv)    Stormwater from Lots 1 to 3 and 14 to 49 must be treated In swales /
                      bioretentlon swales located within road reserve areas;
              (v)     Bioretention swales must have a minimum base width of 1.0 metre;
              (vi)    The use of any retaining walls within the road reserve must be
                      avoided;


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