Appendix B- Geotechnical Investigation

Project No. 1
            115-17158
April, 2015
Ref: 1-17158,, 2015-04-08, BR VE
                               ER 1                                                                                        Page
                                                                                                                           P    |5
John Jamies son – GEOTECHNIC   CAL INVESTIGATION
                                               N - Proposed Resid
                                                                dence, 38 Park Cres
                                                                                  scent, Sunshine Bea
                                                                                                    ach




4.0      G
         GEOTECHN
                NICAL MOD
                        DEL

    4.1 Regional Geology
                 G

The 1:1
      100,000 Gympie Speciial geology sheet indic  cates this site is locateed on a Pleiistocene
sand dune. The morpholog     gy of this aarea is rela
                                                    ated to a relatively
                                                               r          olld (>10,0000 years)
deposition of wind blown san nd (as a dunne system) on the dee eper depossits of residu ual soils
derived from weathhering of the
                              e local bed rock (generally a sand
                                                               dstone in th is area).

The low           evel dunes are depositted and eroded through
       wer beach le                                           h wind and wave action during
periodss of unstable condition
                             ns, and are e considereed to be a dynamic ssystem, continually
undergo oing change
                  es due to cllimatic and wave action
                                                    ns.

    4.2 Subsurfac
                ce Profile

The subbsurface prrofile consis
                              sts of fine to
                                           o medium grained
                                                    g        sand inferred ((as noted above) to
be depoosited as a beach ridg ge dune. Fro rom the DCP tests, the
                                                                e consistenccy of the sa
                                                                                       and was
seen to
      o be very loo
                  ose to loosee to depths of betweenn 1.90m and d 2.60m, oveer medium dense.

                e encountered at depth
Dense ssands were                    hs of 3.00m and 4.40m.

A summ mary of the
                 e subsurfacce profile iis presente
                                                  ed in Table e 1 with deetailed hand auger
recordss and dynam
                 mic cone pe
                           enetrometerr test results
                                                   s are included in Appenndix B.

TABLE
    E1                 SUM
                         MMARY OF
                                F THE SUB
                                        BSURFACE
                                               E PROFILE
                                                              S and (m)                                                     Hand
                                                                                                          DCP Reffusal
 Locatio
       on            RL (m
                         m)           Very Loose
                                           L                  M
                                                              Medium               Dense to                              Aug
                                                                                                                           ger Total
                                                                                                           Depth (m)
                                       to Lo
                                           oose                 Dense             Very Dense e                            De
                                                                                                                           epth (m)
      HA1             16.00
                          0            0.00-2.20              2..20-3.80           3.80-5.50                  5.500         2.60
      HA2
        2             16.50
                          0            0.00-1.90              1..90-3.50           3.50-6.40                  6.400         2.10
      HA3
        3             15.30
                          0            0.00-2.30              2..30-3.50           3.50-5.30                  5.300         2.10
      HA4
        4             18.50
                          0            0.00-2.60              2..60-3.00           3.00-5.20                  5.200         1.90
      HA5
        5             18.70
                          0            0.00-2.40              2..40-3.70           3.70-5.80                  5.800         2.40
      HA6
        6             23.50
                          0            0.00-2.30              2..30-4.40           4.40-6.40                  6.400         2.50
      HA7
        7             23.80
                          0            0.00-2.40              2..40-4.40           4.40-6.20                  6.200         1.90
 Notes:-
       1.    NE - Not Encountered ; TD D - Total Deptth
                                                        th
       2.                elow existing ground
             All depths be             g       level (2
                                                      25 March, 20
                                                                 015).
       3.    RL approximmated from proovided survey plan.

    4.3 Groundwa
               ater

Grounddwater was not encoun  ntered in the
                                         e boreholes
                                                   s at the time
                                                               e of the inveestigation. Seepage
                                                                                        S
through
      h the upperr sandy soils could be            d following periods of prolonged rainfall,
                                          e expected
although this would
                  d be a trans
                             sient condit ion.