Changes Application - MCU15/0023.02

Project No. 112-14608
January, 2013   REF: 1-14608, 2013-01-15, BR VER O.                                    Page 6


3.0   GEOTECHNICAL MODEL

   3.1   Regional Geo/ogv

      The 1:100,000 Gympie Special geology sheet indicates this site is located on a
      Pleistocene sand dune.       The morphology of this area is related to a relatively old
      (>10,000 years) deposition of wind blown sand (as a dune system) on the deeper
      deposits of residual soils derived from weathering of the local bed rock (generally a
      sandstone in this area).


      The lower beach level dunes are deposited and eroded through wind and wave action
      during periods of unstable conditions, and are considered to be a dynamic system,
      continually undergoing changes due to climatic and wave actions.

   3.2   Subsurface Profile

      The subsurface profile consists of fine to medium grained sand inferred (as noted above)
      to be deposited as a beach ridge dune.


      The consistency of the sand was seen to be loose to medium dense sands for the upper
      0.80m increasing to 4.00m at the east of the site overlying medium dense sand. Dense
      sand was encountered at depths of 2.50m increasing to 9.50m.


      At Borehole 1, indurated (very dense) sand was encountered at a depth of 10.90m to
      14.30m. Dense and medium dense sands were then encountered to 20.40m, where very
      dense sand was intersected to the base of the borehole.


      A summary of the subsurface profile is presented in Table 1. Detailed borehole records
      and DCP results are attached in Appendix B.




                                                       #. SOIL SURVEYS ENGINEERING