Geotech 95141.00.R.001

                                                                                                                   Page 4 of 10




Table 1: Results of Plasticity and Particle Size Distribution Testing

    Bore       Depth          Material          FMC               Plasticity             Particle Size Distribution %
    No.         (m)                             (%)
                                                           LL     PL     PI     LS       Gravel        Sand       Silt/Clay
                                                          (%)     (%)   (%)     (%)
      1       1.4-1.8          SAND              2.5          -    -    NP        -          0           97            3
      5       0.4-0.8          SAND              2.3          -    -    NP        -          0           96            4
Where FMC = Field Moisture Content, LL = Liquid Limit, PL = Plastic Limit, PI = Plasticity Index, LS = Linear Shrinkage,
           NP = Non Plastic




6. Comments

6.1        Site Preparation and Earthworks

It is recommended that the following site preparation and earthworks procedures be carried out where
the proposed development will consist of new fill, slab-on-ground construction and/or pavement
construction. Site preparation measures are detailed below:
•         All earthworks should be carried out in accordance with AS 3798 (2007).
•         Any deleterious, soft, wet or highly compressible material or topsoil material rich in organics or root
          matter should be stripped and removed. No topsoil or organic material was recorded at the bore
          locations, but a shallow root zone associated with vegetation may be expected.
•         The stripped surface should be rolled with at least six passes of a minimum 12 tonne deadweight
          roller (or as large as practicable), with a final test roll pass accompanied by careful visual inspection
          to detect the presence of any soft or loose spots. Areas demonstrating excessive movement under
          test rolling will be required to be either tyned, dried and recompacted or removed and replaced with
          select fill well compacted in layers. Treatment should be to a standard sufficient so that the
          subgrade passes test rolling and that compaction can be achieved in the first layer of filling. The
          extent of treatment is best assessed at the time of construction, but large areas of excavation
          should not proceed without geotechnical advice to assess other options.
•         Depressions formed by the removal of vegetation should have all disturbed, weakened soil cleaned
          out and then backfilled with select fill well compacted in layers.
•         It is recommended that where filling is to be carried out over sloping ground (exceeding 8H:1V in
          slope), the slope should be benched to allow for the filling to be 'keyed' into the existing slopes.
          These procedures will provide greater stability of the filling and allow for adequate compaction to
          be achieved throughout the full depth of the filling. Filled batters should also be overfilled and then
          cut back to the required design batter angles in order to maximise compaction of the material in the
          batter faces.
•         Based on the ground conditions encountered, excavations in the site soils could be undertaken
          using conventional small to medium sized earthmoving equipment, such as drotts, backhoes or 5 t
          to 15 t (or larger) excavators.




    Geotechnical Investigation, Proposed Youngcare Facility                                                95141.00.R.001.docx
    32 Viewland Drive, Noosa Heads                                                                                January 2021