Reference Document - MCU24/0002 [As Published]

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                            Existing Dwelling
                            There is an existing dwelling on this site which, when removed, will cause some disturbance to the
                            strata down to depths equal to the depth of the footing. We have assumed that either this disturbance
                            will be back-compacted so the performance of the proposed footings is not compromised or piered
                            through. If during the earthworks phase it is apparent that the disturbed ground is proving
                            problematic, then the design engineer must be consulted to reconsider the situation.
                            Furthermore, there are generally several uncharted abandoned sub-surface pipes, which generally
                            hold a limited amount of water both within themselves and in the sand bed around them. If footing
                            excavations encounter any of these pipes some local seepage may occur, but normally a
                            competent contractor can cope with this situation.
                            Low Bearing Capacity
                            Testing indicates that layers of the observed strata have low bearing capacity between 50 and
                            100kPa. Whist these layers may be suitable for slab on ground construction as per AS2870, these
                            layers may not be suitable to supporting isolated footings without specific engineering design.
                            Slope Stability
                            There are some areas nearby which the local authority may believe to be subject to landslip.
                            Although our commission has specifically excluded consideration of landslip, this does not exclude
                            the possibility that the local authority may request a Slope Stability Assessment for this project, nor
                            does it exclude the possibility that during estate development modifications to the site may have
                            masked any indicators of previous instability.
                            We do not see any reason why construction should not proceed in accordance with the above
                            classification, but if during the various stages of development the possibility of slope instability is
                            flagged by the certifying authority, then a more detailed investigation may be required. In this
                            circumstance, we reserve the right to revise or withdraw this report without penalty. In some cases a
                            slope stability assessment report already exists, but its importance may not have been recognised
                            and not forwarded onto us. If required, we can provide a quotation for a slope stability report or
                            appraise any existing report.
                            Water Table
                            Although no water table was encountered during our testing, a perched water table or water seepage
                            can occur during or after wet periods, generally where a porous layer overlies less porous strata.
                            This generally results in some water seepage into excavations down to this level, but a competent
                            contractor can usually resolve this issue.
                            Other Considerations
                            Prior to construction, our classification assumes all topsoil/estate dressing and any debris including
                            organic vegetation is stripped clear from the building platform. Providing the exposed surface after
                            site clearing is proof rolled and any new fill is compacted and certified in accordance with AS3798-
                            2007 as “controlled” fill, then we do not see the need for additional fill piers on this site, other already
                            mentioned above. Service piers maybe required for structural footings which maybe within the zone
                            of influence of retaining walls, underground services, pools, inground tanks etc.




                            AWT 77775 Site Classification Report
                                                                                                                             Page 4 of 17


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