Attachment 3 - Revised Slope Stability Assessment

                                                                                                                                                                                                                                                                                                                                                                                                                                          Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                BH1
                                                                                                                                                                                                                                                                                                                                                                                                                                         Page 1 of 1

                                                                                                                                                                                                            Engineering Log - Borehole                                                                                                                                 Project No.:                       22328

                                                                                                                                                                                                                 Client:                                  Brett Hage                                                                                                   Commenced:                         19/8/2022
                                                                                                                                                                                                                 Project Name:                            Proposed Subdivision                                                                                         Completed:                         19/8/2022
                                                                                                                                                                                                                 Hole Location:                           96 Black Mountain Range Road, Black Mountain                                                                 Logged By:                         LM
                                                                                                                                                                                                                 Hole Position:                           486514.2 m E 7079389.7 m N MGA2020 Zone 56                                                                   Checked By:                        RKG
                                                                                                                                                                                                                 Drill Model and Mounting:                                4WD Auger                                                   Inclination: -90°                RL Surface:                No survey
                                                                                                                                                                                                                 Hole Diameter:                                           100 mm                                                      Bearing:     360°                Datum:                     AHD             Operator:          Tectonic

                                                                                                                                                                                                                                    Drilling Information                                                                                             Material Description and 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
                                                                                                                                                                                                                                                                                                                        Silty CLAY (FILL), high plasticity, yellow brown,
                                                                                                                                                                                                                                                                                                                        with fine to coarse sized gravel                                F to
                                                                                                                                                                                                                                                                                                                                                                                         St




                                                                                                                                                                                                                                                                                                                                                                                 M

                                                                                                                                                                                                                                                                                                         CH             Silty CLAY, high plasticity, pale brown, trace of                St         160

                                                                                                                                                                                                                                                                                                                        fine grained sand (RESIDUAL)
                                                                                                                                                                                                                                                                                   1



                                                                                                                                                                                                                                                                                                                        Silty CLAY, high plasticity, grey and pale brown,
                                                                                                                                                                                                                                                                                                                        with fine to medium size gravel, trace fine grained                                           Augered to 1.6m
                                                                                                                                                                                                                                                                                                                        sand (XW MATERIAL)
TECTONIC 3.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 22328.GPJ <<DrawingFile>> 13/9/2022 16:40 10.02.00.04 Datgel Lab and In Situ Tool - DGD | Lib: Tectonic 3.00.2 2021-03-30 Prj: Tectonic 3.00.2 2021-03-30




                                                                                                                                                                                                                                                                                                                                                                               D to
                                                                                                                                                                                                                                                                                                                                                                                    VSt
                                                                                                                                                                                                                                   Not Encountered




                                                                                                                                                                                                                                                                                                                                                                                M

                                                                                                                                                                                                                                                                                   2
                                                                                                                                                                                                            AD/T




                                                                                                                                                                                                                                                                                                                                                                                                                      20/100mm
                                                                                                                                                                                                                                                                                                                        META-MUDSTONE, distinctly weathered, very                                                     Refusal
                                                                                                                                                                                                                                                                                                                        low strength (recovered as dry, grey silt)                                                    Augered to 2.5m
                                                                                                                                                                                                                                                                                                                                                                                                                      20/40mm
                                                                                                                                                                                                                                                                                                                                                                                                                      Refusal




                                                                                                                                                                                                                                                                                   3




                                                                                                                                                                                                                                                                                   4



                                                                                                                                                                                                                                                                                                                        Hole Terminated at 4.30 m
                                                                                                                                                                                                                                                                                                                        Target depth




                                                                                                                                                                                                                      Method                                        Penetration                                         Water                    Samples and Tests                         Moisture Condition                 Consistency/Relative Density
                                                                                                                                                                                                                 AD/T-Auger Drilling TC Bit                                  VE - Very Easy         Level (Date)                          U## - Undisturbed Sample (## mm)                     D - Dry                           VS - Very Soft
                                                                                                                                                                                                                 AD/V-Auger Drilling V Bit                                   E - Easy                                                     DS - Disturbed Sample                                M - Moist                         S - Soft
                                                                                                                                                                                                                 RT - Rotary Tri-cone Bit                                                           Inflow                                BDS - Bulk Disturbed Sample                          W - Wet                           F    - Firm
                                                                                                                                                                                                                 RD - Rotary Drilling                                        F - Firm                                                     SPT - Standard Penetration Test                                                        VSt - Very Stiff
                                                                                                                                                                                                                                                                                                    Partial Loss
                                                                                                                                                                                                                 NMLC -Rock Core                                             H - Hard                                                                                                                                            H - Hard
                                                                                                                                                                                                                                                                             VH - Very hard        Complete Loss
                                                                                                                                                                                                                 HA - Hand Auger                                                                                                                                                                  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                                                                                                                                          Fr - Friable
                                                                                                                                                                                                                                                                                                                                                  Classification System