Reference document Geotech Investigation · MCU22/0087.01

                                          PROPOSED UNIT DEVELOPMENT
                                          37 BOTTLEBRUSH AVENUE, NOOSA HEADS

            1.0        INTRODUCTION
            This report details the results of a geotechnical investigation undertaken for a proposed residential unit
            development at 37 Bottlebrush Avenue, Noosa Heads. The investigation was performed by Tectonic at the
            request of Bottlebrush Property, generally in accordance with Proposal P22114-Rev0, dated 22 February
            2022. Recor Consulting are the structural engineers for the project.

            The investigation comprised drilling of boreholes at three locations across accessible areas of the
            development footprint. This report summarises the results of the investigation and provides geotechnical
            recommendations regarding slope stability, earthworks and footings, together with advice regarding
            temporary and permanent basement retention. In summary, subject to the implementation of the
            recommendations made herein, it is assessed that there would be a Low Risk of slope instability affecting
            the proposed development in accordance with the Australian Geomechanics Society Guidelines for
            Landslide Risk Management, dated March 2007 (AGS 2007).



            2.0        PROPOSED DEVELOPMENT
            Preliminary architectural drawings were supplied to us (Ref. PCA Architects, Project No. PCA2.21, Sheet
            Nos. PL03 to PL17, dated 5 April 2022 & 21 April 2022). These plans indicate that the development will
            comprise a three-storey building, over a single level basement carpark and living space. Construction will
            likely include a combination of masonry and lightweight materials (e.g. weatherboard cladding to walls etc.),
            and suspended concrete floors.
            No earthworks details were provided at the time of reporting; however, architectural plans indicate that
            excavations for the lower ground floor would likely be in the order of about 4 m deep to the rear, daylighting
            at the front. Localised filling less than 1 m high is anticipated. Excavations will extend close to the site
            boundaries and, therefore, some form of temporary retention will be required. Isolated deeper excavations
            may be required for underground services and other elements.
            Text Figure 1 below presents the basement layout plan and a cross-sectional view of the proposed
            development.




            Text Figure 1: Cross-sectional view (LHS) and basement layout plan (RHS), courtesy PCA Architects




             13 May 2022
             Report No. 22151-001-Rev0                               1
Document Set ID: 22198682
Version: 1, Version Date: 05/12/2022