Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                              Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                    BH1
                                                                                                                                                                                                                                                                                                                                                                                                                                              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:                                  491496.0 m E 7076881.0 m N MGA94 Zone 56                                                                      Checked By:                     ACD
                                                                                                                                                                                                             Drill Model and Mounting:                                      4WD Auger                                                     Inclination: -90°                RL Surface:                110.50 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 with
                                                                                                                                                                                                                                                                                                             CH             organic material
                                                                                                                                                                                                                                                                                                                                                                                             St
                                                                                                                                                                                                                                                                                                                            Silty CLAY, high plasticity, brown and red, trace
                                                                                                                                                                                                                                                                                                                            organic material
                                                                                                                                                                                                                                                 U50                                                                        (RESIDUAL)
                                                                                                                                                                                                                                                 0.5-0.65m                                                                  without organic material                                        VSt
                                                                                                                                                                                                                                                                             109.5




                                                                                                                                                                                                                                                                                       1
                                                                                                                                                                                                                                                                                                                            becoming pale grey and red
                                                                                                                                                                                                                                                                                                                                                                                             St
                                                                                                                                                                                                                                                                             108.5




                                                                                                                                                                                                                                                                                       2
                                                                                                                                                                                                                                                 U50
                                                                                                                                                                                                                                                 2.0-2.15m
TECTONIC 2.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 19071.GPJ <<DrawingFile>> 17/05/2019 12:01 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




                                                                                                                                                                                                                                                                                                                            becoming dark red and pale grey, trace of fine
                                                                                                                                                                                                                                                                                                                            sized sub-rounded gravel
                                                                                                                                                                                                                               Not Encountered




                                                                                                                                                                                                                                                                             107.5
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                       3                                                                                             M                                    Drill to 3 m



                                                                                                                                                                                                                                                                                                                                                                                                                          20/90mm Refusal
                                                                                                                                                                                                                                                                                                                            becoming dark brown
                                                                                                                                                                                                                                                                                                                                                                                            VSt
                                                                                                                                                                                                                                                                             106.5




                                                                                                                                                                                                                                                                                                                                                                                                                          Augered to 4.0m
                                                                                                                                                                                                                                                                                       4
                                                                                                                                                                                                                                                                                                                            becoming grey and brown
                                                                                                                                                                                                                                                                             105.5




                                                                                                                                                                                                                                                                                                                                                                                                                          Augered to 5.0m
                                                                                                                                                                                                                                                                                       5




                                                                                                                                                                                                                                                                                                                            becoming dark brown
                                                                                                                                                                                                                                                                             104.5




                                                                                                                                                                                                                                                                                       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