Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        BH5
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                                                                                                                                                                                                        Engineering Log - Borehole                                                                                                                                                                             Project No.:                    19071

                                                                                                                                                                                                             Client:                                                                             Ruby Developments                                                                                             Commenced:                      10/04/2019
                                                                                                                                                                                                             Project Name:                                                                       Proposed Retirement Complex                                                                                   Completed:                      10/04/2019
                                                                                                                                                                                                             Hole Location:                                                                      Lot 2 & Lot 3 Myall Street, Cooroy                                                                            Logged By:                      BZ
                                                                                                                                                                                                             Hole Position:                                                                      491456.0 m E 7076837.0 m N MGA94 Zone 56                                                                      Checked By:                     ACD
                                                                                                                                                                                                             Drill Model and Mounting:                                                                          4WD Auger                                                     Inclination: -90°                RL Surface:                108.00 m
                                                                                                                                                                                                             Hole Diameter:                                                                                     100 mm                                                        Bearing:     360°                Datum:                     AHD             Operator:          Ground Drill

                                                                                                                                                                                                                               Drilling Information                                                                                                                                   Soil Description                                                                    Observations




                                                                                                                                                                                                                                                                                                                                                                                                                       Relative Density
                                                                                                                                                                                                                                                                                                                                               Classification
                                                                                                                                                                                                                                                                                                                                                                                                                                             Pocket                          DCP TEST
                                                                                                                                                                                                                 Penetration




                                                                                                                                                                                                                                                                                                                                                                                                                       Consistency
                                                                                                                                                                                                                                                                                                                                 Graphic Log


                                                                                                                                                                                                                                                                                        Samples                                                                                 Material Description                                                                    (AS 1289.6.3.2-1997)
                                                                                                                                                                                                                                                                                                                                                                                                                                          Penetrometer
                                                                                                                                                                                                                                                                                                     Recovery




                                                                                                                                                                                                                                                                                                                                                                                                                       Condition
                                                                                                                                                                                                                                                                                         Tests                                                                    soil type: plasticity or particle characteristics,




                                                                                                                                                                                                                                                                                                                                                                                                                       Moisture
                                                                                                                                                                                                                                                                                                                                                                                                                                              UCS                        Blows per 100 mm
                                                                                                                                                                                                                                                                                                                                               Symbol
                                                                                                                                                                                                        Method




                                                                                                                                                                                                                                                                                        Remarks                                                                    secondary and minor components, colour
                                                                                                                                                                                                                               Water




                                                                                                                                                                                                                                                                                                                 RL      Depth                                                                                                               (kPa)
                                                                                                                                                                                                                                                                                                                 (m)      (m)                                                                                                                             0       5        10      15       20   25




                                                                                                                                                                                                                                                                                                                                                                                                                                          100
                                                                                                                                                                                                                                                                                                                                                                                                                                          200
                                                                                                                                                                                                                                                                                                                                                                                                                                          300
                                                                                                                                                                                                                                                                                                                                                                                                                                          400
                                                                                                                                                                                                                                                                                                                                                                                                                                          500
                                                                                                                                                                                                                                                                                                                                                 CH             Silty CLAY (TOPSOIL), high plasticity, brown,
                                                                                                                                                                                                                                                                                                                                                                                                                                 St
                                                                                                                                                                                                                                                                                                                                                                with organic material
                                                                                                                                                                                                                                                                                     DS                                                          CH             Silty CLAY, high plasticity, brown, trace of fine
                                                                                                                                                                                                                                                                                     0.25-0.5m                                                                  sized rounded gravel
                                                                                                                                                                                                                                                                                                                                                                (Possible ALLUVIUM)
                                                                                                                                                                                                                                                                                                                                                                Silty CLAY, high plasticity, brown and red
                                                                                                                                                                                                                               Groundwater level at 0.6m on completion of drilling




                                                                                                                                                                                                                                                                                                                 107.0




                                                                                                                                                                                                                                                                                                                           1
                                                                                                                                                                                                                                                                                     U50                                                                                                                                        VSt
                                                                                                                                                                                                                                                                                     1.0-1.15m

                                                                                                                                                                                                                                                                                                                                                                                                                         M
                                                                                                                                                                                                                                                                                                                                                                becoming pale grey and red                                                                    Augered to 1.5m
                                                                                                                                                                                                                                                                                     DS
                                                                                                                                                                                                                                                                                     1.5-2.0m
                                                                                                                                                                                                                                                                                                                 106.0




                                                                                                                                                                                                                                                                                                                           2                     SC             Clayey SAND, fine to coarse grained, pale grey,
                                                                                                                                                                                                                                                                                     DS                                                                         high plasticity clay fines, with silt, trace of fine           MD to
                                                                                                                                                                                                                                                                                     2.0-2.5m                                                                   sized rounded gravel                                            D
TECTONIC 2.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 19071.GPJ <<DrawingFile>> 17/05/2019 12:02 10.0.000 Datgel Lab and In Situ Tool - DGD | Lib: Tectonic 2.00.2 2016-10-13 Prj: Tectonic 2.00 2016-02-16




                                                                                                                                                                                                                                                                                                                                                                                                                                                              Augered to 2.4m
                                                                                                                                                                                                                                                                                                                                                 GC             Clayey GRAVEL, fine to medium grained, brown                                                  20/70mm
                                                                                                                                                                                                                                                                                     DS                                                                         and red, with fine to coarse grained sand, high                                               Refusal
                                                                                                                                                                                                                                                                                     2.5-3.0m                                                                   plasticity clay
                                                                                                                                                                                                                               Inflow at 2.7 m




                                                                                                                                                                                                                                                                                                                                                                                                                                 VD
                                                                                                                                                                                                                                                                                                                 105.0
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                                                           3
                                                                                                                                                                                                                                                                                     DS
                                                                                                                                                                                                                                                                                     3.0-3.5m
                                                                                                                                                                                                                                                                                                                                                 CH             Silty CLAY, high plasticity, pale grey and red, fine
                                                                                                                                                                                                                                                                                                                                                                to coarse grained sand, fine sized sub-rounded
                                                                                                                                                                                                                                                                                                                                                                gravel                                                                                        Augered to 3.5m



                                                                                                                                                                                                                                                                                                                                                 CH             Silty CLAY, high plasticity, pale grey and brown
                                                                                                                                                                                                                                                                                                                                                                (RESIDUAL)
                                                                                                                                                                                                                                                                                                                 104.0




                                                                                                                                                                                                                                                                                                                                                                                                                                                              20/80mm
                                                                                                                                                                                                                                                                                                                           4                                                                                                                                  Refusal


                                                                                                                                                                                                                                                                                     DS
                                                                                                                                                                                                                                                                                     4.25-4.75m                                                                                                                          W

                                                                                                                                                                                                                                                                                                                                                                                                                                VSt

                                                                                                                                                                                                                                                                                                                                                                becoming pale grey
                                                                                                                                                                                                                                                                                                                 103.0




                                                                                                                                                                                                                                                                                                                           5



                                                                                                                                                                                                                                                                                                                                                                                                                                                              Augered to 5.5m


                                                                                                                                                                                                                                                                                                                                                                                                                                                              >20
                                                                                                                                                                                                                                                                                                                                                                                                                                                              Refusal
                                                                                                                                                                                                                                                                                                                 102.0




                                                                                                                                                                                                                                                                                                                           6
                                                                                                                                                                                                                                                                                                                                                                Hole Terminated at 6.00 m
                                                                                                                                                                                                                                                                                                                                                                Target depth



                                                                                                                                                                                                                  Method                                                                            Penetration                                    Water                              Samples and Tests                            Moisture Condition                 Consistency/Relative Density
                                                                                                                                                                                                             AD/T-Auger Drilling TC Bit                                                               No resistance                            Level (Date)                    U - Undisturbed Sample                                  D - Dry                           VS - Very Soft
                                                                                                                                                                                                             RR - Rock Roller                                                                          ranging to                                                              D - Disturbed Sample                                    M - Moist                         S - Soft
                                                                                                                                                                                                             RD - Rotary Drilling                                                                        refusal                               Inflow                          SPT - Standard Penetration Test                         W - Wet                           F    - Firm
                                                                                                                                                                                                             NMLC -Rock Core                                                                                                                   Partial Loss                                                                                                              VSt - Very Stiff
                                                                                                                                                                                                             HA - Hand Auger                                                                                                                   Complete Loss                                                                                                             H - Hard
                                                                                                                                                                                                                                                                                                                                                                                                                                          Plastic Limit                  VL - Very Loose
                                                                                                                                                                                                                                                                                                                 Graphic Log/Core Loss                                                                                                                                   L    - Loose
                                                                                                                                                                                                                                                                                                                                                                                    Classification Symbols and                               < PL                        MD - Medium Dense
                                                                                                                                                                                                                                                                                                                    Core recovered (hatching                                             Soil Descriptions
                                                                                                                                                                                                                                                                                                                    indicates material)                                                                                                      = PL                        D - Dense
                                                                                                                                                                                                                                                                                                                                                                                       Based on Unified Soil                                 < PL                        VD - Very Dense
                                                                                                                                                                                                                                                                                                                    Core loss
                                                                                                                                                                                                                                                                                                                                                                                       Classification System