Reference Document - MCU24/0002 [As Published]

                  Qualtest Geotechnics Slope Stability Assessment Tool – Hargreaves & Kidd (2012)

              Grade      (14) Type of Fill                Level   Factor   Grade   (20) In-ground Tank             Level   Factor
              ✓          AS3798 (Level 1 Certified)       L       0.7              >10m from footing               L       0.7
                         Compacted but not certified      M       1.0      ✓       6 to 10m from footing           M       1.0
                         Track-rolled fill (Clay)         H       1.2              3 to 6m from footing            H       1.2
                         Tracked-rolled fill (sand)       VH      1.5              <3m from footing                VH      3.0
                         Obvious compressible fill        VH      3.0              Not known                       VH      4.0



                         (15) Wastewater, Sewerage        Level   Factor   Grade   (21) Landscaping                Level   Factor
                         Fully sewered                    M       0.8              AS2870-2011 compliant           L       0.7
                         Onsite surface disposal within   H       1.5              (+upslope
                         10m of structure                                          diversion bund/swale)
              ✓          Onsite surface disposal > 10m    M       0.9      ✓       AS2870-2011 compliant           M       0.9
                         of structure                                              Non-AS2870-2011                 H       1.5
                         Onsite subsurface disposal       VH      2.0              compliant
                         within 10m of structure                                   Obvious evidence of water       VH      2.5
                         Onsite subsurface disposal >     H       1.0              ponding/poor drainage
                         10m of structure                                          Not known                       VH      4.0
                         Not known                        VH      4.0

                                                                           Grade   (22) For Upslope                Level   Factor
              Grade     (16) Stormwater Disposal          Level   Factor           Boulder / Flow Event
                        To the kerb or council system     M       0.7              Only
              ✓         Rainwater tank with engineer      M       0.7              Engineer designed               L       0.7
                        approved overflow                                          catching net
                        Rainwater tank without engineer   H       1.2              Engineer designed               M       0.9
                        approved overflow                                          upslope bund
                        Dispersed >10m downslope          M       1.0              Engineer designed               M       1.0
                        (approved)                                                 upslope fence
                        Directly onto ground              M       1.5              Non engineer approved           H       1.5
                        Onsite rubble pit                 VH      3.0              method
                        Not known                         VH      4.0              No action taken                 VH      4.0



              Grade     (17) Expandable / Mechanical      Level   Factor   Summary
                        Stormwater & Drainage Pipe                         1       Natural Soil Conditions                 0.8
                        Connectors
                                                                           2       Slope Shape/Appearance                  0.9
                        Specifically, engineer designed   L       0.8
                        and inspected                                      3       Site Geology                            1.0
              ✓         As per AS2870-2011 for            M       1.0      4       Soil Profile                            1.5
                        extremely reactive sites
                                                                           5       Regional Position on Hillside           1.2
                        Not used                          VH      2.0
                        Not known                         VH      4.0      6       Evidence of Groundwater                 0.7
                                                                           7       Evidence of Slope Instability           1.2
                                                                           8       Cut depth                               1.5
              Grade     (18) Footing System               Level   Factor   9       Cut batter angle                        0.5
                        Timber/flexible floor             L       0.7
                                                                           10      Cut batter support                      1.5
                        (suspended, able to be re-
                        leveled)                                           11      Fill depth                              1.5
              ✓         Engineer designed suspended       M       1.0      12      Fill batter angle                       0.5
                        slab                                               13      Fill batter support                     1.8
                        As per AS2870-2011                H       1.2
                                                                           14      Type of fill                            0.7
                        Less than AS2870-2011             VH      2.0
                        generally                                          15      Wastewater system (sewerage etc)        0.9
                        applies to old houses)                             16      Stormwater disposal                     0.7
                        Not known                         VH      4.0      17      Expandable/mechanical pipes             1.0
                                                                           18      Footing system                          1.0
                                                                           19      The foundation strata                   0.7
              Grade     (19) The Foundation Strata        Level   Factor
                                                                           20      In-ground tanks                         1.0
              ✓         Bedrock                           L       0.7
                                                                           21      Landscaping                             0.9
                        Residual Soil                     M       1.0
                                                                           22      Upslope boulder/flow events only        N/A
                        Transported Soil                  H       1.2
                        Fill                              VH      3.0
                                                                           Remediation Output =                             0.46
                        Not Known                         VH      4.0



Document Set ID: 22750694
Version: 1, Version Date: 03/01/2024