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 Geotechnical Investigation Report
 Medihub, Lot 22 Hofmann Drive, Noosaville




Prepared for:
Stockwell Design and Construction
Peter Campbell
Unit 7, 435 Montague Road
West End QLD 4101
Email: [email protected]


Report Number: J001701-006-R-Rev1
October 2022
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Table of Contents
1.0     INTRODUCTION ........................................................................................................................ 1
2.0     PROPOSED DEVELOPMENT ................................................................................................... 1
3.0     SITE DESCRIPTION .................................................................................................................. 1
4.0     METHOD OF INVESTIGATION ................................................................................................. 3
4.1     Review of Available Information ................................................................................................. 3
4.2     Borehole Drilling.......................................................................................................................... 3
4.3     Seismic (Geophysical) Testing ................................................................................................... 3
4.4     Geotechnical Laboratory Testing ................................................................................................ 4
5.0     RESULTS OF INVESTIGATION ................................................................................................ 4
5.1     Published Geological Information ............................................................................................... 4
5.2     Subsurface Conditions ................................................................................................................ 5
5.3     Groundwater ............................................................................................................................... 5
6.0     GEOTECHNICAL COMMENTS & RECOMMENDATIONS ....................................................... 5
6.1     Excavation & Stability ................................................................................................................. 5
6.2     Basement Design........................................................................................................................ 6
6.3     Foundation Design ...................................................................................................................... 6
6.3.1       Site classification ..................................................................................................................... 6
6.3.2       High-level Footings.................................................................................................................. 6
6.3.3       Piled Footings .......................................................................................................................... 7
6.3.4       Footings - General................................................................................................................... 7
6.4     Drainage and Erosion ................................................................................................................. 8
6.5     Retaining Wall Design Parameters ............................................................................................. 8
6.6     Design CBR ................................................................................................................................ 9
6.7     Soil Aggressivity.......................................................................................................................... 9
6.8     Acid Sulfate Soils ...................................................................................................................... 10
7.0     LIMITATIONS ........................................................................................................................... 10




Appendices
Appendix A Figures
Appendix B Reports of Boreholes & Explanatory Notes
Appendix C Geotechnical Laboratory Test Certificates
Appendix D Limitations




J001701-006-R-Rev1                                                                                                                               Page i

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1.0     INTRODUCTION
This report presents the results of a geotechnical investigation carried out by Core Consultants Pty Ltd
(Core) for a proposed commercial development at Lot 22 Hofmann Drive, Noosaville (‘Medihub’).
The work was carried out for Stockwell Design and Construction, in accordance with our proposal Q003643-
002-L-Rev1, dated 19 July 2022.

2.0     PROPOSED DEVELOPMENT
The proposed development is understood to include a two-level building over a double-level basement car
park (requiring about 6 m of bulk excavation), with an at-grade car park/driveway along the eastern
boundary.
The proposed development layout is shown on the attached Figure 1 (Appendix A), and in Image 1 below.




Image 1: Extract from Buchan drawing A-DA-2000 (revision E) showing the proposed development.



3.0     SITE DESCRIPTION
The site comprises Lot 22 on Hofmann Drive (refer Image 1 below) and covers an area of about 1,700 m2.
It is bounded by Hofmann Drive to the west, remnant vegetation and Eenie Creek Road to the north, and
retail development elsewhere.
At the time of the investigation, the site mostly comprised a gravel carpark/laydown area, with short lawn
grass around the perimeter.
The site is generally flat, at about RL 10 m AHD.
General site conditions at the time of our investigation are shown in Photograph 1.




J001701-006-R-Rev1                                                                                 Page 1

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Image 2: Extract from Norris Clarke & O’Brien survey drawing SP322201 (provided by Stockwell).




Photograph 1: Site conditions at the time of the fieldwork (19 August 2022) looking approximately north.




J001701-006-R-Rev1                                                                                  Page 2

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4.0     METHOD OF INVESTIGATION
      4.1 Review of Available Information
To assess likely ground conditions, a review of published geological maps and available geotechnical
information was undertaken (refer Section 5.1).

      4.2 Borehole Drilling
Fieldwork was conducted on 19 August 2022 under the supervision of a geotechnical engineer from Core.
Two boreholes (designated BH4 and BH5) were drilled on the proposed development footprint (refer
attached Figure 1; Appendix A).
The boreholes were drilled using a 4WD-mounted drilling rig utilising uncased solid flight augering, to 8 m
below ground level (BGL).
Dynamic cone penetrometer (DCP) testing was undertaken adjacent to/within the boreholes. Undisturbed
(U50 tube) sampling was conducted in suitable cohesive soils, with pocket penetrometer testing undertaken
in the ends of the U50 tubes.
Soil samples were recovered from the boreholes for subsequent laboratory testing (refer Section 4.4).
Borehole positions were recorded in the field using a handheld GPS unit.
Reports of Boreholes are attached in Appendix B, together with explanatory notes. Subsurface conditions
are discussed in Section 5.2.
      4.3 Seismic (Geophysical) Testing
Geophysical testing in the form of multi-channel analysis of surface waves (MASW) was undertaken on
19 August 2022 by geotechnical engineers from Core. This survey was undertaken to supplement the
borehole data.
MASW geophysical surveys use seismic surface (Rayleigh) wave phase and frequency data to estimate
shear-wave velocities of the subsurface materials.
One MASW survey line (denoted Line 1) was carried out across the proposed building footprint. The survey
comprises a single 1-Dimensional vertical sounding recorded at the centre of the geophone array; refer
Image 3. Vertical soundings were carried out at 4 m intervals by pulling the line.
The MASW acquisition comprised the use of a 24-channel array with 4.5 Hz vertical geophones spaced
horizontally at 1 m. The array was connected to a Geometrics Geode, with data recorded using the
Geometrics Seismodule Controller Software (SCS). A sampling rate of 0.5 ms and sample record length of 2
seconds was adopted. The seismic source was a 16 lb sledgehammer striking a steel plate. Vertical stacking
of the seismic source was carried out at multiple shot locations to increase the signal to noise ratio of the
frequency data. Data from multiple source offsets (i.e., shot locations) was gathered during at each sounding
location.
The acquired data was processed using the SurfSeis 6 software. Dispersion images were generated, which
show the frequency versus the percentage intensity of phase velocity, for each acquired field record. A
dispersion curve was then produced by picking the maximum intensity velocities (of the fundamental mode)
across the useful range of frequencies. The dispersion curves for the survey alignment were put through a
10-layer inversion algorithm to produce one-dimensional shear-wave velocity soundings.
The shear-wave soundings were then gridded using Golden Software’s Surfer 22 to produce a two-
dimensional shear-wave velocity section. Sounding positions have been denoted to show the parts of the
section that have been interpolated during the gridding process.
The quality of the produced MASW dispersion curves for each sounding was very good, with high signal-to-
noise (S/N) ratios, for the fundamental-mode dispersion energy, for the frequency range of between 14 Hz
and 55 Hz; which corresponds to a depth range of between about 1 m and 8 m.




J001701-006-R-Rev1                                                                                 Page 3

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The seismic test results are provided as a subsurface section in the attached Figure 2 (Appendix A) and are
discussed in Section 5.2.




                                                          24 Channel Geophone Array at 1 m Centres.




Image 3: MASW acquisition schematic.

        4.4 Geotechnical Laboratory Testing
Geotechnical laboratory testing was performed at a NATA-accredited laboratory and comprised Atterberg
limits (1 of), shrink-swell (1 of) and single-point CBR testing (1 of).
Laboratory test certificates are attached in Appendix C. The classification testing generally confirms the field
soil classifications. Shrink-swell test results are discussed in Section 6.3.1 and CBR results in Section 6.5.

5.0         RESULTS OF INVESTIGATION
        5.1 Published Geological Information
Published information 1 indicates that the site is underlain by residual soils and weathered rock of the Late
Triassic to Jurassic age Tiaro Coal Measures (Duckinwilla Group). An extract of the geological map is shown
in Image 2.
The subsurface conditions encountered in the boreholes (described in Section 5.2) generally confirm the
published geology; and are similar to conditions previously encountered in this area.




                                                                                             Indicative site location




Image 3: Extract from published geology map.



1
    Gympie Special Geology Map, Sheet 9445 and Part 9545, First Edition 1999, Department of Mines and Energy




J001701-006-R-Rev1                                                                                                      Page 4

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      5.2 Subsurface Conditions
The boreholes generally encountered very stiff to hard residual clay. Some very stiff clay fill (or reworked
natural soil) was encountered in BH5 to 0.9 m BGL. In BH4 the residual clay tends to extremely weathered
rock from about 6 m BGL.
The seismic testing confirms the results of the borehole drilling and indicates inferred extremely weathered
rock from about 7 m to 8 m BGL.
      5.3 Groundwater
Groundwater was not encountered during drilling. This is in line with our previous experience in this area
where groundwater was also not encountered during drilling. However, groundwater seepage may have
been slow to develop through the low permeability clays within the boreholes. Our previous experience on
the commercial developments immediately to the south-west, as well as the residential development to the
north-east, is that groundwater was encountered at about RL 3 m to RL 4.3 m AHD (i.e. equivalent to about
5.7 m to 7 m BGL at Lot 22).
Groundwater levels on the site may vary depending on weather/climate and human influences (e.g. surface
drainage).

6.0     GEOTECHNICAL COMMENTS & RECOMMENDATIONS
      6.1 Excavation & Stability
Excavation for the proposed double-level basement is expected to mainly encounter very stiff or hard clays.
Excavation of such materials should be achievable using conventional small to medium size earthmoving
equipment (i.e. 12 to 20 tonne excavators). Larger equipment will improve excavation productivity. Ripper
attachments may be required where weathered rock is encountered or within confined excavations.
The subgrade of the approximate 6 m deep basement excavation is expected to comprise very stiff/hard
residual clay or extremely weathered rock. Trafficability of this material should generally be good, except
when exposed to water. It would be prudent to allow for the placement of a 150 mm thick layer of aggregate
across the base of the excavation and elsewhere on the site where vehicle/machinery access is required, to
assist with access and trafficability in the event of rain and/or groundwater seepage.
Working platform assessments must be carried out by a suitably qualified person (RPEQ) for heavy
machinery or equipment (e.g. crane or piling rig, if required) prior to trafficking and operations.
Groundwater inflow/seepage may be encountered during the basement excavation, depending on the
groundwater level at the time of the excavation. Based on the relatively low permeability of the residual
clays, such inflows could likely be managed through a series of sumps in the excavation base and pumping
out from these sumps. The excavation base should be graded to direct water to the sumps, and/or a system
of shallow drains could be considered. Discharge of captured groundwater will be subject to relevant
Council/State guidelines.
Subject to space limitations, the basement excavation could be temporarily battered, followed by wall
construction. Temporary batters should be no steeper than 1V:1H in the residual clays but must should be
assessed (particularly for possible fissured clays) by a geotechnical RPEQ. Steeper batters may be possible
in the lower portions of the excavation where weathered rock may be found, subject to inspection by a
geotechnical RPEQ. Batters in uncontrolled fill (if encountered) may need to be less steep (about 1V:2H).
If battering is not suitable, then a soldier pile wall with shotcrete infill could be considered (and could form the
permanent wall; refer Section 6.2).
Piles will likely need to be propped, braced or anchored to limit bending moments and deflections and to
provide control of soil movements behind the wall. These movements may be both lateral and vertical. Such
movement has the potential to damage adjacent adjoining in-ground services and structures (if any). A soil-
structure interaction analysis would need to be undertaken to assess such movement as part of the
temporary stability design. Temporary basement support must be designed by a suitably qualified and



J001701-006-R-Rev1                                                                                      Page 5

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experienced engineer (RPEQ), and advice from specialist contractors should be sought regarding the design
and construction. The temporary support system adopted would need to prevent the loss of support to
adjacent buildings and other structures (if any), whilst also acting to limit groundwater seepage (if any) into
the excavation.
Shoring will also be required to enable safe personnel entry into trenches (with vertical sides) deeper than
1 m. The above recommendations do not supersede any existing safety regulations or legislation applicable
to excavations (e.g. limits on personnel entry into trenches).

     6.2 Basement Design
An engineer-designed soldier pile wall with shotcrete infill could be used for temporary excavation stability
and could also form the permanent wall, as well as potentially carry vertical loads from the structure above.
Anchored supports or bracing will be required until the ground floor is constructed.
For preliminary design, walls supported by multiple rows of anchors or props could be designed using a
rectangular earth pressure distribution of 0.25γH kPa over the full height of the wall [where H is the total
vertical height of the wall in metres and γ is the bulk unit weight of the soil retained (suggested value
20 kN/m3)]. It is probable that the earth pressure will be below this value at the top and toward the base of
the wall. Core should be contacted if further details are required. Surcharge loading should be multiplied by a
lateral coefficient of 0.25 to calculate the resulting additional lateral pressure on the wall.
Groundwater was not encountered during drilling (refer Section 5.3); however, given the proposed basement
depth (in the order of 6 m BGL), the presence of groundwater against the basement walls cannot be
discounted. A ‘wet’ basement design may be viable (subject to regulator approval) – possibly designed to
accommodate hydrostatic pressure to a nominated groundwater level (say 3 m BGL), with inflow/relief valves
into the basement for higher groundwater levels. In our experience, ‘wet’ basement designs are not favoured
by regulators (e.g. Council). A ‘dry’ (or ‘tanked’) basement design may therefore be required, designed to
withstand hydrostatic pressure from groundwater at a preliminary design level of 2 m BGL (e.g. about
40 kPa) provided relief valves are installed at this level.
Installation and monitoring of a groundwater standpipes to 6 m BGL are recommended to confirm the above
recommendations regarding groundwater/hydrostatic pressure. The standpipe can be installed during
proposed fieldwork on Lot 2 (proposed Retail outlets development) and monitoring will need to include a
significant wet period to provide meaningful results.

     6.3 Foundation Design
    6.3.1 Site classification
The site classification derived in accordance with Australian Standard AS 2870-2011 Residential slabs and
footings is not directly applicable to developments of this type but can provide an indication of the likely
magnitude of reactive (shrink and swell) movements associated with normal seasonal soil moisture
variations.
Due to the presence of fill the site is classified Class P. The existing soil profile on the site could be classified
as equivalent ‘Class ‘M’ in accordance with AS 2870-2011 The estimated characteristic ground surface
movement due to seasonal moisture variation (‘ys’ value) for this site is estimated to be in the order of 20 mm
to 40 mm.
It should be noted that the estimated order of movement is based on the existing soil profile (i.e. no cutting or
filling), and moisture content changes within soils due to normal seasonal moisture variations only.

    6.3.2 High-level Footings
Ground conditions at basement level are likely to comprise very stiff/hard residual clays (and possibly
weathered rock). A high-level pad, strip or raft footing system in this material is considered appropriate and
could be designed using an allowable bearing pressure (ABP) of 300 kPa. Settlement is estimated to be less
than 30 mm. Preliminary analysis of the raft suitability could be carried out using the geotechnical design
parameters provided in Table 1 below.



J001701-006-R-Rev1                                                                                       Page 6

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Ancillary or isolated structures not part of the basement structure could be supported on high-level strip or
pad footings, with maximum 25 mm settlement, as follows:
        Stiff natural clay:          100 kPa ABP
        Very stiff natural clay:     200 kPa ABP
        Hard natural clay:           300 kPa ABP

    6.3.3 Piled Footings
If settlements/stresses are found to be excessive below peak loads in parts of the raft slab (e.g. under
columns or lift cores), piles may be required below peak loads. The proposed building design may also
require tension piles at selected locations outside of the building superstructure envelope to resist
hydrostatic/uplift pressures and overturning forces, or piles for ancillary structures.
Bored concrete or continuous flight auger (CFA) piles could be considered. Driven piles may not be suitable
due to vibration impacts on adjacent structures.
Indicative pile design parameters are provided in Table 1. Settlement of the piled footings is expected to be
in the order of 0.5% of the pile width. Ultimate geotechnical capacities (Rd,ug) determined from the
parameters provided must be multiplied by a geotechnical strength reduction factor (øg) in accordance with
Section 4 of AS 2159-2009 Piling – Design and installation to determine the design geotechnical strength
(Rd,g). The geotechnical strength reduction factor should be determined in accordance with AS 2159-2009
and is expected to be in the range of 0.45 to 0.55. An upper bound value may be adopted if supervision and
certification of pile construction is carried out by a geotechnical engineer. Ultimate (unfactored) geotechnical
parameters for pile design are shown below in Table 1.
For temporary basement retention (if required), the lateral capacity of a pile is provided by the passive
resistance of the surrounding soil. The soils to a depth 1.5 times the pile diameter below the excavated
surface should be ignored in the assessment of lateral capacity. The lateral capacity of piles may be
determined using various methods, and which generally require an estimation of the Young’s modulus (Es) of
the founding stratum.
Specialist piling contractors should be consulted regarding selection of suitable pile types, detailed design of
piles, the potential vibration effects caused by pile driving and suitable dynamic pile testing methods and
testing frequency.
Table 1: Recommended values for raft or pile design.
                                       Unit                                                         Ultimate        Ultimate
                                                  Undrained         Elastic
                                     weight                                        Poisson’s          skin            base
            Material type                         Cohesion         Modulus
                                        Ƴ                                            Ratio          friction       resistance
                                                  (Cu) (kPa)        (MPa)
                                     (kN/m3)                                                         (kPa)            (kPa)

 Stiff Clay                             18            50              8-20                              20              NR
 Very Stiff Clay                        19            100            15-40           0.2-0.3            50              NR
 Hard Clay/EW Sandstone                 20            200            40-70                              80            1,800
Notes:
    1)   NR – Not recommended
    2)   Skin friction should be discounted for sections of pile shafts where liners are in place.
    3)   Indicative modulus values taken from published paper, Site Characterisation, Terence Wiesner, Australian Geomechanics –
         Dec 1999 and ‘Foundation Analysis & Design (Bowles, 4th Edition)
    4)   Below the groundwater level the submerged unit weight of the soil should be adopted.

    6.3.4 Footings - General
To achieve the design parameters, founding materials must be dry and cleaned of any loose, disturbed or
saturated materials prior to pouring concrete. If any soil conditions encountered during footing excavation are
found to differ from those noted in the geotechnical investigation, Core should be notified immediately, and
further assessment carried out to determine if changes to footing design are required. The footings
excavations should be assessed by a geotechnical RPEQ to confirm founding material.




J001701-006-R-Rev1                                                                                                  Page 7

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Adequate site drainage should be carried out to ensure that stormwater runoff is directed away from the
building walls and footings. All proposed footings should found such that they are not adversely affected by
any adjacent excavations, batter slopes, trenches, or retaining walls that are not designed to support building
or fill loads. To minimise the potential for any adverse interaction effects, footings should found at least
below a plane extending 1 m horizontally from the base of trenches/batter slopes/excavations/retaining walls,
then rising up at 1V:1H. This requirement is illustrated in Diagram 1.




Diagram 1: Exclusion zone for base of footings.

     6.4 Drainage and Erosion
Site drainage should be designed to readily remove surface water, minimise water infiltration into the slope,
and to prevent ponding of water on subgrade areas during construction and also adjacent to foundations,
perimeter slabs, and driveways once construction is completed.
Roof water, including overflow from rainwater tanks, and water collected from hard surfaces (e.g. driveways)
must be directed by pipes or lined channels to a legal point of discharge.
Shallow subsurface cut-off drains should be installed upslope of building areas in order to intercept and
divert potential subsurface seepage. Diversion drains should be constructed above the crest of any cut or fill
embankments.
Any exposed soil on sloping ground must be protected from erosion (e.g. through re-vegetation).

     6.5 Retaining Wall Design Parameters
Design for basement walls could be carried out using a triangular pressure distribution applicable to the wall
type (i.e. active pressures for a cantilever wall or ‘at rest’ pressures for a propped wall) and based on the
parameters in Table 4 below. These values assume that the walls are fully drained and no allowance is
included for construction loading, adjacent foundation loadings, the effect of sloping ground, or backfill
compaction stresses.




J001701-006-R-Rev1                                                                                 Page 8

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Table 2: Retaining Structure Design Parameters.
                                                        Unit         Friction
                                                                                    Lateral Earth Pressure Coefficient
                                                       Weight         Angle
                   Retained Material                                                   Ka             Ko
                                                       (t/m3)      (Degrees)        (Cantilever   (Non yielding       Kp
                                                                                      Wall)          wall)

 Stiff Clay                                             1.8            27             0.41           0.58            2.46

 Very Stiff Clay                                        1.9            29             0.36           0.53            2.77

 Hard Clay                                              2.0            33              0.3           0.45             3.5
 Notes:
 Ka - active; Ko - at rest; Kp - passive

 For yielding walls active state develops when: Deflection > 0.001H to 0.004H (granular soil), or deflection > 0.01H to
 0.04H (cohesive soil).
 Positive permanent drainage must be installed behind all walls unless they are designed for development of full
 hydrostatic pressures (i.e. a ‘tanked’ basement).


     6.6 Design CBR
CBR testing on a sandy clay sample (fill/reworked natural soil) returned a CBR value of 5%, with a swell
value of 1%. Based on our experience with similar materials, and on consideration of the test results, a
design CBR of 5% is recommended for the residual sandy clay subgrade.
The recommended design CBR value is applicable for properly drained subgrades only that are compacted
to a minimum dry density of 98% (standard). Properly drained subgrades should allow for open graded
drains that shed water and prevent ponding.
If exposed clay subgrades are exposed to rainfall or stormwater, softening (and resulting subgrade strength
less than nominated above) can occur and the material will become difficult to handle or moisture condition.
This can cause significant delays during construction and must be considered in the design/planning and site
management (e.g. timing of work and temporary/long term site drainage design).
Construction validation testing is recommended on pavement subgrades to confirm design parameters prior
to pavement construction.

     6.7 Soil Aggressivity
The chemical composition of soil can provide an indication of the potential for long term damage to
foundations, buried pipelines, in-ground structures, services and other infrastructure. Soil texture is also
important in this regard, as granular soils allow oxygen exchange (oxidation) to occur more readily and are
also more permeable.
Australian Standard AS 2159-2009 Piling - Design and installation provides the range of exposure
classification of the surface of concrete piles based on the range of chemical conditions in soil and
groundwater.
Our previous experience indicates that the residual clays encountered can be classified as ‘Mild’ in
accordance with the definitions given in AS 2159-2009 Table 6.4.2(C) Exposure Classification for Concrete
Piles – Piles in Soil.




J001701-006-R-Rev1                                                                                                Page 9

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      6.8 Acid Sulfate Soils
The development of acid sulfate soils (ASS) is commonly the result of marine or estuarine deposition of
sulfate and iron bearing sediments in the presence of an abundant source of readily decomposable organic
matter resulting in the deposition of pyrite. This pyrite is stable within the soil so long as anoxic conditions
prevail. Oxidation of this material produces acidic conditions and oxidation typically occurs as the material is
exposed above the water table by excavation, and by lowering the water table during dewatering processes.
The investigation found that the site is underlain by residual soils, which are not associated with ASS on the
basis of their geological origin. ASS were not encountered in the investigation, including below RL 5 m AHD.
The results of the investigation therefore indicate that testing or management of acid sulfate soils is not
warranted for this site.

7.0     LIMITATIONS
Should you require any further information please contact the undersigned. We draw your attention to the
document, Limitations, which is included in Appendix D.




Core Consultants Pty Ltd




Walter Mastenbroek
MEngPr (Civil) MSc (Env) BSc (Hons) MIEAust CPEng NER RPEQ 16149
Associate Director/Senior Geotechnical Engineer




Geoff Hurley
MSc DIC C.Geol RPEQ 5716
Managing Director/Principal Geotechnical Engineer


WM/GAH/wm

A.B.N. 75 603 384 050




J001701-006-R-Rev1                                                                                   Page 10

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Appendix A
Figures

 

J001701-006-R-Rev1

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© CORE CONSULTANTS PTY. LTD. INFORMATION CONTAINED ON THIS DRAWING IS THE COPYRIGHT OF CORE CONSULTANTS PTY. LTD, UNAUTHORISED USE OR REPRODUCTION OF THIS PLAN EITHER WHOLLY OR IN PART WITHOUT WRITTEN PERMISSION INFRINGES COPYRIGHT,

 

 

NORTHING (m)

LEGEND

4 APPROXIMATE BOREHOLE LocaTiON “!=*“°* APPROXIMATE SEISMIC LINE LOCATION
PROPOSED LOT BOUNDARY

Base plan drawn by Buchan Group. Drawing Tile - Basement 02. Drawing No.- A-DA-100-82. Rev No.-K. Dated 18 May 2022.
Aerial Image sourced from Nearmag Pty Ltd, Image dated 15 July 2022. Annotations by Core Consultants Pty Ltd.

 

EASTING (m)

504870

 

 

504930

 

 

core

 

www.coreconsultants.com.au

Sant

STOCKWELL DESIGN AND CONSTRUCTION

MEDIHUB (LOT-22) - HOFFMAN DRIVE & WALTER HAY DRIVE

 

 

 

 

 

 

MD 25/08/2022
CEOEDEY one GEOTECHNICAL TEST LOCATION PLAN
wm 26/08/2022
1:450 A3 J001701 003 | TM | FOO1 0 | SHEET 1 OF 1

 

 

 

 

 

 

 

Plot Date: 26 August 2022 Time: 11:05 AM By: CAD Path: J:\2022 - 11479\9001701 - Stockwell Subdivision-Eeenie Creek Road\PHASE 1000 - Geotechnical\Figures Drawings\J001701-GIS\J001701.aprx

 

Page 15

                                                                    BH5                                                                                                   BH4
                                                                  (Offset 15 m)                                                                                        (Offset 10 m)


                                                                                                       Line 1: Shear-Wave Velocities (m/s)

                                             -1
              Depth Below Ground Level (m)




                                             -2

                                             -3                                                            Inferred stiff to hard residual clay (vs 150 m/s to 300 m/s)


                                             -4

                                             -5

                                             -6
                                                                                                                                                                                          Approximate basement excavation level
                                             -7

                                                                                        300
                                                                                                            300                           300
                                             -8                                                                           Inferred extremely weathered sandstone
                                                                                                                                        (vs >300 m/s)
                                                  0   2   4   6       8           10   12     14      16        18          20           22          24           26               28      30           32         34         36       38        40
                                                                                                                      Chainage (m)




                                                                                                            Shear-wave Velocity (vs in m/s)



                                                                                                 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0
                                                                                               10 12 15 17 20 22 25 27 30 32 35 37 40 42 45 47 50




                                                                                                                                                                               DRAWN                     CLIENT:
                                                                                                                                                                                                BH                  STOCKWELL DESIGN AND CONSTRUCTION
                                                                                                                                                                               CHECKED                   PROJECT:
                                                                                                                                                                                                WM
                                                                                                                                                                                                                                PROPOSED MEDIHUB
    DENOTES LOCATION OF 1D SOUNDING                                                                                                            Scale                           DATE                                     LOT 22 HOFMANN DRIVE, NOOSAVILLE
                                                                                                                                                                                           24/08/2022
                                                                                                                               0           2            4           6          SCALE       AS SHOWN      TITLE:              MASW SECTION: LINE 1
REFER TO FIGURE 1 FOR SECTION LOCATION
                                                                                                                                                                               ORIGINAL                  PROJECT NO:                        FIGURE NO:         REV:
THIS DOCUMENT MUST BE READ IN CONJUCTION WITH CORE DOCUMENT J001701-006-R-Rev0.
                                                                                                                                                                               SIZE             A3                          J001701                      002          0

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Appendix B
Reports of Boreholes & Explanatory Notes

 

J001701-006-R-Rev1

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                                                                                                                                                                                                                                                                                                                                                                                                                REPORT OF BOREHOLE: BH4
                                                                                                                                                                                                                                                                                                                                                                               East            504850.0 m
                                                                                                                                                                                                                                                                                                                                                                               North           7078495.0 m MGA94 Zone 56                                     Sheet               1 OF 1
                                                                                                                                                                                                                                                  Client                            Stockwell Design and Construction                                                          Surface RL      10.00 m AHD                                                   Logged:             MD
                                                                                                                                                                                                                                                  Project                           Medihub                                                                                    Contractor      Core Consultants pty ltd                                      Logged Date:        19/08/22
                                                                                                                                                                                                                                                  Location                          Lot 22 Hofmann Drive                                                                       Drill Rig       Eziprobe                                                      Checked:            WM
                                                                                                                                                                                                                                                  Job No.                           J001701                                                                                    Inclination     -90° Hole Dia. 100 mm                                         Checked Date:       05/10/22

                                                                                                                                                                                                                                                                 Drilling                                    Sampling                                                                                         Field Material Description




                                                                                                                                                                                                                                                                                                                                                     GROUP SYMBOL




                                                                                                                                                                                                                                                                                                                                                                                                                                   CONSISTENCY
                                                                                                                                                                                                                                                   PENETRATION




                                                                                                                                                                                                                                                                                                                               RECOVERED
                                                                                                                                                                                                                                                                                                                                                                                                                                                                 DCP TEST
                                                                                                                                                                                                                                                   RESISTANCE




                                                                                                                                                                                                                                                                                                                                                                                                                                   CONDITION
                                                                                                                                                                                                                                                                                                                                                                                                                                   MOISTURE
                                                                                                                                                                                                                                                                                                          SAMPLE OR




                                                                                                                                                                                                                                                                                                                                           GRAPHIC
                                                                                                                                                                                                                                         METHOD




                                                                                                                                                                                                                                                                                                                                                                                                                                   DENSITY
                                                                                                                                                                                                                                                                                                                                                                             SOIL/ROCK MATERIAL DESCRIPTION                                                   Blows per 100 mm
                                                                                                                                                                                                                                                                                   (metres)
                                                                                                                                                                                                                                                                 WATER




                                                                                                                                                                                                                                                                                                          FIELD TEST
                                                                                                                                                                                                                                                                                   DEPTH




                                                                                                                                                                                                                                                                                                                                           LOG
                                                                                                                                                                                                                                                                                              DEPTH                                                                                                                                              0       5           10     15       20   25
                                                                                                                                                                                                                                                                                               RL
                                                                                                                                                                                                                                                                                      0
                                                                                                                                                                                                                                                      M                                       9.98    0.00 m                                         GM             FILL Silty Sandy GRAVEL: fine to coarse grained,                 D   VD
                                                                                                                                                                                                                                                                                                      ASS samples taken                              CI             sub-angular, grey; sand fine to coarse grained.
                                                                                                                                                                                                                                                                                                      at 0.25 m intervals to
                                                                                                                                                                                                                                                                                                      2m                                                            CLAY (RESIDUAL SOIL) with silt with sand: medium                       St
                                                                                                                                                                                                                                                       L                                                                                                            plasticity, brown mottled grey; sand fine to coarse grained;
                                                                                                                                                                                                                                                                                                                                                                    trace gravel, fine, sub-rounded.
                                                                                                                                                                                                                                                                                                      DS 0.50-0.70 m
                                                                                                                                                                                                                                                                                              0.70    U50 0.50-1.00 m
                                                                                                                                                                                                                                                                                              9.30    REC=0.22, PP=                                                 Pale red brown, brown, grey; tending to silty clay in parts,         VSt
                                                                                                                                                                                                                                                                                                      500kpa                                                        sand fine to medium grained, without gravel.
                                                                                                                                                                                                                                                                                      1




                                                                                                                                                                                                                                                                                      2
CORE 2.01.1 LIB.GLB Log IS AU BOREHOLE 3 J1701-RETAIL OUTLETS-HOFFMAN DRIVE WALTER HAY DRIVE.GPJ <<DrawingFile>> 5/10/2022 12:17 10.02.00.04 Datgel Lab and In Situ Tool - DGD | Lib: Core 2.01.1 2020-05-19 Prj: Core 2.00 2020-03-24




                                                                                                                                                                                                                                                      M
                                                                                                                                                                                                                                                                                                                                                                                                                                                     *Augered to this depth before
                                                                                                                                                                                                                                                                                                                                                                                                                                                     recommencing test



                                                                                                                                                                                                                                                                                              3.00
                                                                                                                                                                                                                                                                                      3
                                                                                                                                                                                                                                                                                              7.00    DS 3.00-3.20 m                                 CI             Silty CLAY (RESIDUAL SOIL) with sand: medium plasticity,
                                                                                                                                                                                                                                                                                                                                                                    pale red brown, grey; sand fine to medium grained.
                                                                                                                                                                                                                                                                 Not Encountered




                                                                                                                                                                                                                                                                                                                                                                                                                                                     *Augered to this depth before
                                                                                                                                                                                                                                         ADT




                                                                                                                                                                                                                                                                                      4                                                                                                                                            w<                recommencing test
                                                                                                                                                                                                                                                                                                                                                                                                                                   PL



                                                                                                                                                                                                                                                                                                                                                                                                                                           H




                                                                                                                                                                                                                                                   M-H                                5




                                                                                                                                                                                                                                                                                              6.00
                                                                                                                                                                                                                                                                                      6
                                                                                                                                                                                                                                                                                              4.00                                                                  Trace sand: pale red brown, grey; tending to extremely
                                                                                                                                                                                                                                                                                                                                                                    weathered material.




                                                                                                                                                                                                                                                      H                               7




                                                                                                                                                                                                                                                                                               8.00
                                                                                                                                                                                                                                                                                      8
                                                                                                                                                                                                                                                                                                                                                                    Hole Terminated at 8.00 m
                                                                                                                                                                                                                                                                                                                                                                    Target depth
                                                                                                                                                                                                                                                                                                                                                                    Backfilled


                                                                                                                                                                                                                                                                                                                         This report must be read in conjunction with accompanying notes and abbreviations.

Page 18

                                                                                                                                                                                                                                                                                                                                                                                                                REPORT OF BOREHOLE: BH5
                                                                                                                                                                                                                                                                                                                                                                              East             504850.0 m
                                                                                                                                                                                                                                                                                                                                                                              North            7078498.0 m MGA94 Zone 56                                       Sheet               1 OF 1
                                                                                                                                                                                                                                                  Client                            Stockwell Design and Construction                                                         Surface RL       10.00 m AHD                                                     Logged:             MD
                                                                                                                                                                                                                                                  Project                           Medihub                                                                                   Contractor       Core Consultants pty ltd                                        Logged Date:        19/08/22
                                                                                                                                                                                                                                                  Location                          Lot 22 Hofmann Drive                                                                      Drill Rig        Eziprobe                                                        Checked:            WM
                                                                                                                                                                                                                                                  Job No.                           J001701                                                                                   Inclination      -90° Hole Dia. 100 mm                                           Checked Date:       05/10/22

                                                                                                                                                                                                                                                                 Drilling                                    Sampling                                                                                         Field Material Description




                                                                                                                                                                                                                                                                                                                                                     GROUP SYMBOL




                                                                                                                                                                                                                                                                                                                                                                                                                                     CONSISTENCY
                                                                                                                                                                                                                                                   PENETRATION




                                                                                                                                                                                                                                                                                                                               RECOVERED
                                                                                                                                                                                                                                                                                                                                                                                                                                                                   DCP TEST
                                                                                                                                                                                                                                                   RESISTANCE




                                                                                                                                                                                                                                                                                                                                                                                                                                     CONDITION
                                                                                                                                                                                                                                                                                                                                                                                                                                     MOISTURE
                                                                                                                                                                                                                                                                                                          SAMPLE OR




                                                                                                                                                                                                                                                                                                                                           GRAPHIC
                                                                                                                                                                                                                                         METHOD




                                                                                                                                                                                                                                                                                                                                                                                                                                     DENSITY
                                                                                                                                                                                                                                                                                                                                                                             SOIL/ROCK MATERIAL DESCRIPTION                                                     Blows per 100 mm
                                                                                                                                                                                                                                                                                   (metres)
                                                                                                                                                                                                                                                                 WATER




                                                                                                                                                                                                                                                                                                          FIELD TEST
                                                                                                                                                                                                                                                                                   DEPTH




                                                                                                                                                                                                                                                                                                                                           LOG
                                                                                                                                                                                                                                                                                              DEPTH                                                                                                                                                0       5           10     15       20   25
                                                                                                                                                                                                                                                                                               RL
                                                                                                                                                                                                                                                                                      0
                                                                                                                                                                                                                                                                                              10.00
                                                                                                                                                                                                                                                                                               0.10   0.00 m                                         GM             FILL Silty Sandy GRAVEL: fine to coarse grained,
                                                                                                                                                                                                                                                      M                                        9.90   ASS samples taken                                             sub-angular, grey; sand fine to coarse grained.                    D   VD
                                                                                                                                                                                                                                                                                               0.30   at 0.25 m intervals to
                                                                                                                                                                                                                                                                                               9.70   2m                                                            0.03 m thick layer of remnant asphalt.
                                                                                                                                                                                                                                                                                                                                                     CI
                                                                                                                                                                                                                                                       L                                              BDS 0.40-0.90 m                                               Possibly FILL Sandy CLAY (REWORKED NATURAL) with silt
                                                                                                                                                                                                                                                                                                                                                                    with gravel: medium plasticity, brown; sand fine to coarse
                                                                                                                                                                                                                                                                                                                                                                    grained; gravel fine to medium grained, sub-angular to
                                                                                                                                                                                                                                                                                                                                                                    sub-rounded.
                                                                                                                                                                                                                                                                                                                                                                                                                                           VSt
                                                                                                                                                                                                                                                                                              0.90
                                                                                                                                                                                                                                                                                              9.10                                                   CI             CLAY (RESIDUAL SOIL) with silt with sand: medium
                                                                                                                                                                                                                                                                                      1
                                                                                                                                                                                                                                                                                              1.10                                                                  plasticity, pale red brown, grey; sand fine to medium grained.
                                                                                                                                                                                                                                                                                              8.90
                                                                                                                                                                                                                                                                                                                                                                    Grey, pale red brown; tending to silty clay in parts, observed
                                                                                                                                                                                                                                                                                                                                                                    fissuring.




                                                                                                                                                                                                                                                      M

                                                                                                                                                                                                                                                                                      2
CORE 2.01.1 LIB.GLB Log IS AU BOREHOLE 3 J1701-RETAIL OUTLETS-HOFFMAN DRIVE WALTER HAY DRIVE.GPJ <<DrawingFile>> 5/10/2022 12:17 10.02.00.04 Datgel Lab and In Situ Tool - DGD | Lib: Core 2.01.1 2020-05-19 Prj: Core 2.00 2020-03-24




                                                                                                                                                                                                                                                                                                                                                                                                                                                       *Augered to this depth before
                                                                                                                                                                                                                                                                                                                                                                                                                                                       recommencing test



                                                                                                                                                                                                                                                                                              3.00
                                                                                                                                                                                                                                                                                      3
                                                                                                                                                                                                                                                                                              7.00                                                   CI             Silty CLAY (RESIDUAL SOIL) trace sand: medium plasticity,
                                                                                                                                                                                                                                                                                                                                                                    grey, pale grey, pale red brown; sand fine grained.
                                                                                                                                                                                                                                                                 Not Encountered




                                                                                                                                                                                                                                                                                                                                                                                                                                                       *Augered to this depth before
                                                                                                                                                                                                                                                                                              4.00
                                                                                                                                                                                                                                         ADT




                                                                                                                                                                                                                                                                                      4                                                                                                                                                                recommencing test
                                                                                                                                                                                                                                                                                              6.00                                                                  Pale red brown, grey.                                            w<
                                                                                                                                                                                                                                                                                                                                                                                                                                     PL



                                                                                                                                                                                                                                                                                                                                                                                                                                           VSt /
                                                                                                                                                                                                                                                                                                                                                                                                                                            H


                                                                                                                                                                                                                                                                                      5
                                                                                                                                                                                                                                                                                                      DS 5.00-5.20 m


                                                                                                                                                                                                                                                                                                                                                                                                                                                       *Augered to this depth before
                                                                                                                                                                                                                                                      H                                                                                                                                                                                                recommencing test

                                                                                                                                                                                                                                                                                              5.80
                                                                                                                                                                                                                                                                                              4.20                                                   CI-            CLAY (RESIDUAL SOIL) with silt trace sand: medium to high
                                                                                                                                                                                                                                                                                                                                                     CH             plasticity, dark red brown, grey; sand fine grained; observed
                                                                                                                                                                                                                                                                                      6
                                                                                                                                                                                                                                                                                                                                                                    fissuring.




                                                                                                                                                                                                                                                                                                      DS 6.80-7.00 m
                                                                                                                                                                                                                                                                                      7




                                                                                                                                                                                                                                                                                               8.00
                                                                                                                                                                                                                                                                                      8
                                                                                                                                                                                                                                                                                                                                                                    Hole Terminated at 8.00 m
                                                                                                                                                                                                                                                                                                                                                                    Target depth
                                                                                                                                                                                                                                                                                                                                                                    Backfilled


                                                                                                                                                                                                                                                                                                                         This report must be read in conjunction with accompanying notes and abbreviations.

Page 19

                                              EXPLANATION OF NOTES, ABBREVIATIONS & TERMS
                                              USED ON BOREHOLE AND TEST PIT REPORTS
DRILLING/EXCAVATION METHOD
AS       Auger Screwing                  RD             Rotary blade or drag bit                  NQ           Diamond Core - 47 mm
AD       Auger Drilling                  RT             Rotary Tricone bit                        NMLC         Diamond Core - 52 mm
*V       V - Bit                         RAB            Rotary Air Blast                          HQ           Diamond Core - 63 mm
T        TC - Bit, e.g. ADT              RC             Reverse Circulation                       HMLC         Diamond Core – 63mm
HA       Hand Auger                      PT             Push Tube                                 BH           Tractor Mounted Backhoe
ADH      Hollow Auger                    CT             Cable Tool Rig                            EX           Tracked Hydraulic Excavator
DTC      Diatubre Coring                 JET            Jetting                                   EE           Existing Excavation

WB       Washbore or Bailer              NDD            Non-destructive digging                   HAND         Excavated by Hand Methods

PENETRATION/EXCAVATION RESISTANCE
L        Low resistance . Rapid penetration possible with little effort from the equipment used
M        Medium resistance. Excavation possible at an acceptable rate with moderate effort from equipment used
H        High resistance to penetration/excavation. Further penetration is possible at a slow rate
R        Refusal or Practical Refusal. No further progress possible without the risk of damage or unacceptable wear to the digging implement
         or machine.
These assessments are subjective and are dependent on many factors including the equipment power, weight, condition of excavation or drilling tools,
and the experience of the operator.

WATER
                               Water level shown at date                                                 Partial water loss
                               Water inflow                                                              Complete water loss
GROUNDWATER NOT                The observation of groundwater whether present or not, was not possible due to drilling water, surface seepage or cave in
OBSERVED                       of the borehole/test pit.
GROUND WATER NOT               The borehole/test pit was dry soon after excavation. However, groundwater could be present in less permeable strata.
ENCOUNTERED                    Inflow may have been observed had the borehole/test pit been left open for a longer period.
SAMPLING AND TESTING
SPT                   Standard Penetration Test to AS1289.6.3.1-2004
4,7,11 N=18           4,7,11 = Blows per 150mm            N = Blows per 300mm penetration following 150mm seating
30/80mm                 Where practical refusal occurs, the blows and penetration for that interval are reported
RW                    Penetration occurred under the rod weight only
HW                    Penetration occurred under the hammer and rod weight only
HB                    Hammer double bouncing on anvil
DS                    Disturbed Sample
BDS                   Bulk disturbed sample
G                     Gas Sample
W                     Water sample
FP                    Field permeability test over section noted
FV                    Field vane shear test expressed as uncorrected shear strength (sv = peak value)
PID                   Photoionisation Detector reading in ppm
PM                    Pressuremeter test over section noted
PP                    Pocket penetrometer test expressed as instrument reading in kPa
U63                   Thin walled tube sample - number indicates nominal sample diameter in millimetres
WPT                   Water pressure tests
DCP                   Dynamic cone penetration test
CPT                   Dynamic cone penetration test

CPTu                  Static cone penetration test with pore pressure (u) measurement

ROCK CORE RECOVERY

        TCR = Total Core Recovery (%)                         SCR = Solid Core Recovery (%)                        RQD = Rock Quantity Designation (%)

Page 20

                                            METHOD OF SOIL DESCRIPTION USED ON BOREHOLE AND TEST PIT
                                            REPORTS
                           FILL                                                          CLAY (CL,CI, or CH)

                           GRAVEL (GP or SW)                                             ORGANIC SOILS (OL or OH or Pt)


                           SAND (SP or SW)                                               COBBLES or BOULDERS

                           SILT (ML or MH)

Combinations of these basic symbols may be used to indicate mixed materials such as sandy clay.

CLASSIFICATION AND INFERRED STRATIGRAPHY
Soil and Rock is classified and described in Reports of Boreholes and Test Pits using the preferred method given in AS 1726 - 2017. The material proper-
ties are assessed in the field by visual/tactile methods.

                         PARTICLE SIZE                                                                  PLASTIC PROPERTIES

      Major
                    Sub Division               Particle Size
     Division

               Boulders                          >200 mm

               Cobbles                         63 - 200 mm

      Gravel              Coarse               20 - 63 mm

      Gravel             Medium                6.7 - 20 mm

      Gravel               Fine               2.36 - 6.7 mm

      Sand                Coarse              0.6 - 2.36 mm

      Sand               Medium               0.21 - 0.6 mm

      Sand                 Fine             0.075 - 0.21 mm


                 Silt                    0.002 - 0.075 mm

                Clay                           <0.002 mm

MOISTURE CONDITION FOR COARSE GRAINED SOIL                        AS 1726 - 2017

Symbol             Term                                           Description

D                  Dry                                            Non-cohesive and free running

M                  Moist                                          Soil feels cool, darkened in colour, tends to stick together

W                  Wet                                            Soil feels cool, darkened in colour, soil sticks together, free water forms when handling

MOISTURE CONDITION FOR FINE GRAINED SOIL                          AS1726 - 2017


Symbol             Term                                           Description
W<PL               Moist dry of liquid limit                      Hard and friable or powdery
W = PL             Moist near plastic limit                       Soils can be molded at a moisture condition approximately equal to the plastic limit
W >PL              Moist, wet of plastic limit                    Soils usually weakened and free water forms on hands when handling
W = LL             Wet near plastic limit
W > LL             Wet, wet of liquid limit
CONSISTENCY TERMS FOR                           AS1726—2017           RELATIVE DENSITY OF COARSE GRAINED SOILS                                   AS1726—2017
COHESIVE SOILS
                                                                      Symbol                 Term                      Density Index %           SPT ‘N’ #
Symbol           Term                           Undrained Shear
                                                                      VL                     Very Loose                Less than 15              0 to 4
                                                Strength
                                                                      L                      Loose                     15 to 35                  4 to 10
VS               Very Soft                      0 to 12 kPa

S                Soft                           12 to 25 kPa          MD                     Medium Dense              35 to 65                  10 to 30

F                Firm                           25 to 50 kPa          D                      Dense                     65 to 85                  30 to 50

St               Stiff                          50 to 100 kPa         VD                     Very Dense                Above 85                  Above 50

VSt              Very Stiff                     100 to 200 kPa        In the absence of test results, consistency and density may be assessed from correlations with
                                                                      the observed behaviour of the material.
H                Hard                           Above 200 kPa

Page 21

                                              TERMS FOR ROCK MATERIAL STRENGTH & WEATHERING AND
                                              ABBREVIATIONS FOR DEFECT DESCRIPTIONS
ROCK MATERIAL STRENGTH CLASSIFICATION                                 AS1726—2017

Symbol          Term               Uniaxial         Point Load                                                Field Guide
                                                   Strength Is (50)
                                Compressive
                                                       (MPa)
                               Strength (MPa)
VL        Very Low             0.6 to 2            0.03 to 0.1        Material crumbles under firm blows with sharp end of pick. Pieces up to 30 mm thick can
          Strength                                                    be broken with finger pressure.

L         Low Strength         2 to 6              0.1 to 0.3         Easily scored with knife. Indentations 1 mm to 3 mm show in the specimen with firm
                                                                      blows of the pick point. A piece of core 150 mm by 50 mm may be broken by hand. Sharp
                                                                      edges of core are friable and break during handling.

M         Medium               6 to 20             0.3 to 1           Readily scored with a knife. A piece of core 150 mm by 50 mm can be broken by hand
          Strength                                                    with difficulty.

H         High Strength        20 to 60            1 to 3             A piece of core 150 mm by 50 mm cannot be broken by hand but can be broken by a pick
                                                                      with a single firm blow. Rock rings under hammer.

VH        Very High            60 to 200           3 to 10            Hand specimen breaks with pick after more than one blow. Rock rings under hammer.
          Strength

EH        Extremely High       Above 200           Above 10           Specimen requires many blows with geological pick to break through intact material. Rock
          Strength                                                    rings under hammer.

       = Diametral Point Load Test                  = Axial Point Load Test

CLASSIFICATION OF MATERIAL                        AS1726—2017
WEATHERING
     Symbol                   Term                                                                  Field Guide
RS                  Residual Soil (Note 1)        Material is weathered to such an extent that it has soil properties. Mass structure and material texture and
                                                  fabric of original rock are no longer visible but the soil has not been significantly transported.

XW                  Extremely Weathered           Material is weathered to such an extent that is has soil properties. Mass structure and material texture and
                    (Note 1)                      fabric of original rock are still visible.

HW                  Highly Weathered (Note 2) The whole rock mass is discoloured, usually by iron staining or beaching to the extent that the colour of the
                                              original rock is not recognizable. Rock strength is significantly changed by weathering. Some primary miner-
                                              als have weathered to clay minerals. Porosity may be increased by leaching, or may be decreased due to
                                              deposition of weathering products in pores.

MH                  Moderately Weathered          The whole of the rock material is discoloured, usually by iron staining or bleaching to the extent that the
                    (Note 2)                      colour of the original rock is not recognizable, but shows little or no change in strength from fresh rock.

SW                  Slightly Weathered            Pock is partially discoloured with staining or bleaching along joints but shows little or no change of strength
                                                  from fresh rock.

FR                  Fresh                         Rock shows no signs of decomposition of individual minerals or colour change.

Note 1              The term ‘Extremely Weathered rock’ is misleading as the material has soil properties. The word ‘rock’ should be replaced with the name
                    of the original rock of the word ‘material’, eg. Extremely Weathered granite or Extremely Weathered material.

Note 2              Where it is not possible to distinguish between ‘Highly Weathered’ and ‘Moderately Weathered’ rock the term ‘Distinctly Weathered’ may
                    be used.
                       DEFECT TYPE/DESCRIPTION                                           DEFECT PROFILE                          DEFECT ROUGHNESS
                                                                               Symbol               Description                       DESCRIPTION
B           Bedding Parting               V           Vein
                                                                               PL                   Planar
                                                                                                                         Symbol               Description
J           Joint                         HB/DB       Handling/Drilling        St                   Stepped
                                                      Break                                                              Sl                   Slickenside
                                                                               Un                   Undulating
EW          Extremely Weathered           C           Contact                                                            Sm                   Smooth
                                                                                    DEFECT INFILL DESCRIPTION
            Seam
                                                                               Symbol               Description          Ro                   Rough
FZ          Fracture Zone                 L           Cleavage                                                           Vertical Boreholes - The dip
                                                                               Cn                   Clean: No visible
                                                                                                    coating              (inclination from horizontal) for the
CZ/S        Crushed Zone/Seam             X           Foliation                                                          defect is given.
                                                                               Sn                   Stain: Coated 1 to
                                                                                                    3 mm               Inclined Boreholes - The inclination
IS          Infilled Seam                 S           Schistocity                                                      is measured as the acute angle to the
                                                                               Vr                   Veneer: < 1 mm     core axis.
SZ/S        Sheared Zone/Seam                                                  Ct                   Coating: 1 to 3
                                                                                                    mm

Page 22

Stockwell

 

Appendix C
Geotechnical Laboratory Test Certificates

 

J001701-006-R-Rev1

Page 23

Material Test Report
Report Number:        202937.00-111                                                                                                                  Douglas Partners Pty Ltd
                                                                                                                                                   Sunshine Coast Laboratory
Issue Number:         1
                                                                                                                                  1/28 Kessling Avenue Kunda Park QLD 4556
Date Issued:          14/09/2022
                                                                                                                                                      Phone: (07) 5351 0400
Client:               Core Consultants Pty Ltd
                                                                                                                                  Email: [email protected]
                      Unit 1/18 Lysaght Street, Coolum Beach QLD 4573
Contact:              Walter Mastenbroek
Project Number:       202937.00
Project Name:         Proposed Development
Project Location:     Material Testing, Maroochydore QLD
Client Reference:     J001701                                                                            Accredited for compliance with ISO/IEC 17025 - Testing

Work Request:         19522
Sample Number:        SS-19522D
Date Sampled:         19/08/2022
                                                                                                                       Approved Signatory: Shae Harry
Dates Tested:         25/08/2022 - 09/09/2022
                                                                                                                              Laboratory Manager
Sampling Method:      Sampled by Client
                                                                                                                    Laboratory Accreditation Number: 828
                      The results apply to the sample as received
Sample Location:      BH4, Depth: 0.5 - 0.7 m

Particle Size Distribution (AS1289 3.6.1)
Sieve                     Passed %            Passing Limits
2.36 mm                            84
0.075 mm                           59

Atterberg Limit (AS1289 3.1.2 & 3.2.1 & 3.3.1)             Min       Max
Sample History                          Oven Dried
Preparation Method                       Dry Sieve
Liquid Limit (%)                             64
Plastic Limit (%)                            23
Plasticity Index (%)                         41

Linear Shrinkage (AS1289 3.4.1)                            Min       Max
Moisture Condition Determined By       AS 1289.3.1.2
Linear Shrinkage (%)                       16.5
Cracking Crumbling Curling                       None




 Report Number: 202937.00-111                This document shall not be reproduced except in full without approval of the laboratory.                             Page 2 of 4
                                                               Results relate only to the items tested/sampled.

Page 24

Material Test Report
Report Number:        202937.00-111                                                                                                                       Douglas Partners Pty Ltd
                                                                                                                                                      Sunshine Coast Laboratory
Issue Number:         1
                                                                                                                                  1/28 Kessling Avenue Kunda Park QLD 4556
Date Issued:          14/09/2022
                                                                                                                                                           Phone: (07) 5351 0400
Client:               Core Consultants Pty Ltd
                                                                                                                                  Email: [email protected]
                      Unit 1/18 Lysaght Street, Coolum Beach QLD 4573
Contact:              Walter Mastenbroek
Project Number:       202937.00
Project Name:         Proposed Development
Project Location:     Material Testing, Maroochydore QLD
Client Reference:     J001701                                                                            Accredited for compliance with ISO/IEC 17025 - Testing

Work Request:         19522
Sample Number:        SS-19522E
Date Sampled:         19/08/2022
                                                                                                                       Approved Signatory: Shae Harry
Dates Tested:         25/08/2022 - 09/09/2022
                                                                                                                              Laboratory Manager
Sampling Method:      Sampled by Client
                                                                                                                    Laboratory Accreditation Number: 828
                      The results apply to the sample as received
Sample Location:      BH5, Depth: 0.4 - 0.9 m

California Bearing Ratio (AS 1289 6.1.1 & 2.1.1)            Min   Max                                          California Bearing Ratio
CBR taken at                                    2.5 mm                                  1.6
CBR %                                               5
Method of Compactive Effort                            Standard                         1.4
Method used to Determine MDD                    AS 1289 5.1.1 & 2.1.1
Method used to Determine Plasticity               Visual Assessment                     1.2
Maximum Dry Density (t/m3)                        1.91
Optimum Moisture Content (%)                      14.0                                    1

Laboratory Density Ratio (%)                      95.0
                                                                                        0.8
Laboratory Moisture Ratio (%)                    100.5
Dry Density after Soaking (t/m3)                  1.80
                                                                                        0.6
Field Moisture Content (%)                        13.3
Moisture Content at Placement (%)                 14.2                                  0.4
Moisture Content Top 30mm (%)                     18.8
Moisture Content Rest of Sample (%)               15.7                                  0.2
Mass Surcharge (kg)                               4.5
Soaking Period (days)                               4                                     0
                                                                                              0     1     2     3      4     5      6    7    8       9     10   11   12   13
Curing Hours                                      72.0
Swell (%)                                         1.0
                                                                                                                        Results         2.5       5
Oversize Material (mm)                             19
Oversize Material Included                     Excluded
Oversize Material (%)                             0.0




 Report Number: 202937.00-111                This document shall not be reproduced except in full without approval of the laboratory.                                  Page 3 of 4
                                                               Results relate only to the items tested/sampled.

Page 25

Material Test Report
Report Number:        202937.00-111                                                                                                                 Douglas Partners Pty Ltd
                                                                                                                                                  Sunshine Coast Laboratory
Issue Number:         1
                                                                                                                                 1/28 Kessling Avenue Kunda Park QLD 4556
Date Issued:          14/09/2022
                                                                                                                                                     Phone: (07) 5351 0400
Client:               Core Consultants Pty Ltd
                                                                                                                                 Email: [email protected]
                      Unit 1/18 Lysaght Street, Coolum Beach QLD 4573
Contact:              Walter Mastenbroek
Project Number:       202937.00
Project Name:         Proposed Development
Project Location:     Material Testing, Maroochydore QLD
Client Reference:     J001701                                                                           Accredited for compliance with ISO/IEC 17025 - Testing

Work Request:         19522
Date Sampled:         21/08/2022
Dates Tested:         25/08/2022 - 05/09/2022
                                                                                                                      Approved Signatory: Shae Harry
Sampling Method:      Sampled by Client
                                                                                                                             Laboratory Manager
                      The results apply to the sample as received
                                                                                                                   Laboratory Accreditation Number: 828
Location:             Material Testing

Shrink Swell Index AS 1289 7.1.1 & 2.1.1
Sample Number                               SS-19522B                    SS-19522C
Date Sampled                                 19/08/2022                   19/08/2022
Date Tested                                  05/09/2022                   05/09/2022
Material Source                                 Insitu                       Insitu
Sample Location                                  BH2                          BH4
                                            (1.0 - 1.5 m)                (0.5 - 1.0 m)
Inert Material Estimate (%)                        0                           7
Pocket Penetrometer before (kPa)                  40                          500
Pocket Penetrometer after (kPa)                   40                          490
Shrinkage Moisture Content (%)                   20.5                         20.7
Shrinkage (%)                                    0.6                          4.3
Swell Moisture Content Before (%)                20.4                         24.6
Swell Moisture Content After (%)                 20.4                         25.9
Swell (%)                                        -0.1                         0.2
Shrink Swell Index Iss (%)                       0.3                          2.4
Visual Description                                **                           **
Cracking                                         UC                           UC
Crumbling                                         **                           No
Remarks                                           **                           **

Shrink Swell Index (Iss) reported as the percentage vertical strain per pF change in suction.
Cracking Terminology: UC Uncracked, SC Slightly Cracked, MC Moderately Cracked, HC Highly Cracked, FR Fragmented.
NATA Accreditation does not cover the performance of pocket penetrometer readings.




 Report Number: 202937.00-111               This document shall not be reproduced except in full without approval of the laboratory.                             Page 4 of 4
                                                              Results relate only to the items tested/sampled.

Page 26

Stockwell

 

Appendix D
Limitations

 

J001701-006-R-Rev1

Page 27

                                             LIMITATIONS

This Document has been provided by Core Consultants Pty Ltd (“Core”) subject to the following
limitations:

This Document has been prepared for the particular purpose outlined in Core’s proposal and no
responsibility is accepted for the use of this Document, in whole or in part, in other contexts or for
any other purpose.

The scope and the period of Core’s Services are as described in C o r e ’s proposal, and are
subject to restrictions and limitations. Core did not perform a complete assessment of all possible
conditions or circumstances that may exist at the site referenced in the Document. If a service
is not expressly indicated, do not assume it has been provided. If a matter is not addressed, do not
assume that any determination has been made by Core in regards to it.

Conditions may exist which were undetectable given the limited nature of the enquiry Core was
retained to undertake with respect to the site. Variations in conditions may occur between
investigatory locations, and there may be special conditions pertaining to the site which have not
been revealed by the investigation and which have not therefore been taken into account in
the Document. Accordingly, additional studies and actions may be required.

In addition, it is recognised that the passage of time affects the information and assessment provided
in this Document. Core’s opinions are based upon information that existed at the time of the
production of the Document. It is understood that the Services provided allowed Core to form no
more than an opinion of the actual conditions of the site at the time the site was visited and cannot
be used to assess the effect of any subsequent changes in the quality of the site, or its surroundings,
or any laws or regulations.

Any assessments made in this Document are based on the conditions indicated from published
sources and the investigation described. No warranty is included, either express or implied, that
the actual conditions will conform exactly to the assessments contained in this Document.

Where data supplied by the client or other external sources, including previous site investigation
data, have been used, it has been assumed that the information is correct unless otherwise stated.
No responsibility is accepted by Core for incomplete or inaccurate data supplied by others.

Core may have retained subconsultants affiliated with Core to provide Services for the benefit of
Core. To the maximum extent allowed by law, the Client acknowledges and agrees it will not have
any direct legal recourse to, and waives any claim, demand, or cause of action against, Core’s
affiliated companies, and their employees, officers and directors.

This Document is provided for sole use by the Client and is confidential to it and its professional
advisers. No responsibility whatsoever for the contents of this Document will be accepted to any
person other than the Client. Any use which a third party makes of this Document, or any reliance
on or decisions to be made based on it, is the responsibility of such third parties. Core accepts no
responsibility for damages, if any, suffered by any third party as a result of decisions made or
actions based on this Document.




Limitations                                Page 1 of 1                                   Date: 12/07/2018
FRM-065                             Uncontrolled When Printed                                  Issue: 1.02

Page 28

CLIENTCHOICE Awards CLIENTCHOICE Awards

2022 2022
° °

7 g

BEST CONSULTING. BEST
ENGINEERING FIRM ENVIRONMENTAL,
FIRM

 

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