Development Application Part 2 of 2 - Geotech Report and Plans - OPW13/0816

                                                       NOTES RELATING TO THIS REPORT



.lNIRQDUCU01l.                                                                       descriptive terms regarding weathering (AS1726-1993
These notes are provided by Soil Surveys Engineering                                 Table   A9), strength (refer Table             1    below;, (:l;:.~:l~~:;
Pty Lm ted (the Company) to complement                                         the   (AS1726-1993 Table A10), etc. Where strength testing
geotechnical report in regard to classification methods                              (ie Point Loads) is carried out, AS1726-1993 Table A8
and field procedures.                    Not all notes are necessarily               is used. Where relevant, further information regarding

relevant to all reports.                                                             rock classification is attached.

The     ground          is   a   product of continuing natural and
                                                                                      Table 1 Estimated strength descriptions given to rock
man-made processes and therefore exhibits a variety
                                                                                                 based on engineering examination
of characteristics and properties which vary from place

to   place and           can       change with time.            Geotechnical         :1~t,iJ;(\;~\;~~’m:~~~r0\~~J1~jr~ :~,~r~~~~!~~~~)!!!1’
engineering involves gathering and assimilating limited                                    Extremely Weak                            < 1.0


information about these characteristics and properties
                                                                                              Very Weak                            1.0   -
                                                                                                                                             5.0
in order to understand or predict the behaviour of the
                                                                                                   Weak                            5.0   -
                                                                                                                                             25
ground on a particular site under certain conditions.
This report may contain such information obtained by                                       Moderately Strong                       25- 50


inspection, excavation, probing, sampling, testing or                                            Strong                            50 -100

other means of investigation.                     If so, they are directly
                                                                                              Very Strong                          100   -
                                                                                                                                             250
relevant only to the ground at the place where and at
                                                                                           Extremely Strong                          > 250

 he time when the investigation was carried out.
                                                                                       Ref ISRM "Suggested Methods for the Quantitative
DESCRIPTION AND CLASSIFICA TION METHODS
                                                                                           Description of Discontinuities in Rock Masses"
Soils   -   The methods of description and classification of

soils and rocks used                     in this report       are    based      on

                                                                                     SAMPLING
Australian         Standard          1726-1993         (Geotechnical Site
Investigations),              where       appropriate.          In                   Sampling is carried out during drilling or from other
                                                                       general,
                                                                                     excavations to allow          engineering       examination          (and
descriptions cover the following properties                     -   soil or rock

type, colour, structure, strength                        or    density,        and   laboratory testing where required) of the soil or rock.

nclusions. Identification and classification of soil and                             Disturbed      samples taken           during       drilling     provide

rock    involves                                                                     information    on      plasticity, grain size, colour, moisture
                         judgement and             the   Company infers
                                                                                     content,    minor       constituents    and, depending               upon
accuracy only to the extent that is common in current

geotechnical practice.                                                               sample disturbance, (information                on      strength     and

                                                                                     structure).
Soil   types are described according to the dominant
                size     and       behaviour                                         Undisturbed samples           are    taken    by pushing         a    thin
particle                                          as     set    out     in     AS

1726-1993.                                                                           walled sample tube, usually SOmm diameter (USO),into

                                                                                     the soil and withdraWing it with          a   sample of the soil
Cohesive soils are classified on the basis of strength
                                                                                     contained     in   a    relatively   undisturbed        state.     Such
(consistency) either by                   use   of hand        penetrometer,
shear                                                                                samples yieid information on structure and strength,
                vane,        laboratory      testing      or      engineering
                                                                                     and   are   necessary for laboratory determination                     of
examination.                 The    strength    terms     are       defined     in
                                                                                     shear    strength,        volume       change        potential       and
AS1726-1993 Table A4.
                                                                                     compressibility.         Undisturbed    sampling          is   generally
Non-cohesive soils                 are    classified     on    the    basis of
                                                                                     effective only in cohesive soils.
relative        density usually           based    on    insitu      testing    or

                                                                                     Details of the type and method of sampling used are
engineering examination (see AS1726-1993 Table A5).
                                                                                     given on the attached logs.
Rocks       -
                Rock types are classified              by their geological
names           (AS1726-1993 Table                 A6), together             with




NOTES RELA nNG TO THIS REPORT.JUNE 2009.LWP                                                                    SOIL SURVEYS ENGINEERING