Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                             Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                   BH8
                                                                                                                                                                                                                                                                                                                                                                                                                                            Page 1 of 1

                                                                                                                                                                                                        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:                                 491618.0 m E 7076581.0 m N MGA94 Zone 56                                                                      Checked By:                     ACD
                                                                                                                                                                                                             Drill Model and Mounting:                                     4WD Auger                                                     Inclination: -90°                RL Surface:                121.00 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), dark brown, with organic                    S
                                                                                                                                                                                                                                                                                                                           material and fine to medium grained sand
                                                                                                                                                                                                                                                 DS                                                         CH
                                                                                                                                                                                                                                                 0.2-0.6m                                                                  Silty CLAY, high plasticity, brown and orange,
                                                                                                                                                                                                                                                                                                                           trace of fine to medium grained sand
                                                                                                                                                                                                                                                                                                                           (RESIDUAL)

                                                                                                                                                                                                                                                                                                                                                                                                                         >20
                                                                                                                                                                                                                                                                                                                           becoming brown and red, without sand                                                          Refusal
                                                                                                                                                                                                                                                                                                                                                                                    M
                                                                                                                                                                                                                                                                            120.0




                                                                                                                                                                                                                                                                                      1
                                                                                                                                                                                                                               Not Encountered




                                                                                                                                                                                                                                                                                                                           becoming pale grey and red


                                                                                                                                                                                                                                                                                                                                                                                                                         Augered to 1.5m
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                                                                                                                           VSt

                                                                                                                                                                                                                                                                                                                           becoming red and pale grey
                                                                                                                                                                                                                                                                            119.0




                                                                                                                                                                                                                                                                                      2
TECTONIC 2.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 19071.GPJ <<DrawingFile>> 17/05/2019 12:03 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




                                                                                                                                                                                                                                                                                                                                                                                                                         20/70mm
                                                                                                                                                                                                                                                                                                                                                                                    D                                    Refusal
                                                                                                                                                                                                                                                                            118.0




                                                                                                                                                                                                                                                                                      3
                                                                                                                                                                                                                                                                                                                           Hole Terminated at 3.00 m
                                                                                                                                                                                                                                                                                                                           Target depth
                                                                                                                                                                                                                                                                            117.0




                                                                                                                                                                                                                                                                                      4
                                                                                                                                                                                                                                                                            116.0




                                                                                                                                                                                                                                                                                      5
                                                                                                                                                                                                                                                                            115.0




                                                                                                                                                                                                                                                                                      6




                                                                                                                                                                                                                  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