Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                             Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                   BH6
                                                                                                                                                                                                                                                                                                                                                                                                                                             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:                                 491560.0 m E 7076719.0 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, dark                                                   HW
                                                                                                                                                                                                                                                                                                                                                                                            St                           HW
                                                                                                                                                                                                                                                                                                                           brown, with organic material
                                                                                                                                                                                                                                                                                                            CH             Silty CLAY, high plasticity, brown, trace of organic
                                                                                                                                                                                                                                                                                                                           material
                                                                                                                                                                                                                                                 BDS                                                                       (RESIDUAL)
                                                                                                                                                                                                                                                 0.5-1.0m                                                                  becoming brown and red
                                                                                                                                                                                                                                                                            107.0




                                                                                                                                                                                                                                                                                      1
                                                                                                                                                                                                                               Not Encountered
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                                                                                                                    M
                                                                                                                                                                                                                                                                                                                                                                                           VSt
                                                                                                                                                                                                                                                                            106.0




                                                                                                                                                                                                                                                                                      2
                                                                                                                                                                                                                                                                                                                           becoming pale grey and red, trace of fine sized
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




                                                                                                                                                                                                                                                                                                                           sub-rounded gravel


                                                                                                                                                                                                                                                                                                                           becoming pale grey
                                                                                                                                                                                                                                                                            105.0




                                                                                                                                                                                                                                                                                      3
                                                                                                                                                                                                                                                                                                                           Hole Terminated at 3.00 m
                                                                                                                                                                                                                                                                                                                           Target depth
                                                                                                                                                                                                                                                                            104.0




                                                                                                                                                                                                                                                                                      4
                                                                                                                                                                                                                                                                            103.0




                                                                                                                                                                                                                                                                                      5
                                                                                                                                                                                                                                                                            102.0




                                                                                                                                                                                                                                                                                      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