Changes Application - MCU15/0023.02

Project No. 112-14608
January, 2013    REF: 1-14608, 2013-01-15, BR VER O.                                            Page 8


4.0   ENGINEERING ASSESSMENT

   4.1    Traffickabilitv and Site Preparation

      At the time of the Investigation, problems with traffickability problems were encountered in
      vehicle accessible areas, due to the recent demolition work disturbing the surface sand
      layers.


      The use of a sub-base gravel overlay (MRS 11.05, Subtype 2.4, B or C Grading/150mm
      nominal layer thickness) should be considered in vehicle access areas to improve general
      tralfickability   during construction.   Use of tracked equipment      may be necessary for
      traffickability on the sand subgrade.


      The relevant contractors should therefore fully inform themselves of the ground conditions
      on site prior to commencement of earthworks.


      Working Platforms For Tracked Plant and Heavy Construction Vehicles


      The scope of Soil Surveys Engineering's study DOES NOT include the design of a
      working platform for heavy construction vehicles or heavy tracked plant.


      Detailed design of a working platform should be carried out considering the operation of
      actual machinery proposed to be used. This is particularly important when considering
      the use of heavy piling rigs and heavy cranes - the piling/crane contractor should be
      consulted regarding their requirements.

   4.2   Earthworks

      It is envisaged that any earthworks will consist of only minor levelling works. Filling within
      the back half of the site is not recommended due to the potential for destabilising the
      existing slope.

      All earthwork procedures should be carried out in a responsible manner in accordance
      with    AS.3798-2011      "Guidelines    on   Earthworks   for   Commercial    and   Residential
      Developments".

      Earthwork procedures should include the following:-

             Clearing, stripping and grubbing should be carried out In areas subject to earthworks
             and construction. Also all soils containing organic matter should be stripped from the
             construction area. This material is not considered suitable for use as structural fill.



                                                            ~    SOIL SURVEYS ENGINEERING