Acid Sulfate Report

                                            25 EDWARD STREET, NOOSAVILLE
                                            PROPOSED DUPLEX DEVELOPMENT



Table of Contents

1.0   INTRODUCTION ........................................................................................................................................................ 1

2.0   SITE DESCRIPTION & PROPOSED DEVELOPMENT ............................................................................................. 1

      2.1         Proposed Development ................................................................................................................................ 2

      2.2         Regional Geology ......................................................................................................................................... 3

      2.3         Regional ASS Mapping ................................................................................................................................. 3

3.0   METHOD OF INVESTIGATION ................................................................................................................................. 4

4.0   INVESTIGATION FINDINGS ..................................................................................................................................... 5

      4.1         Subsurface Conditions .................................................................................................................................. 5

      4.2         Groundwater Conditions ............................................................................................................................... 5

5.0   GEOTECHNICAL ASSESSMENT ............................................................................................................................. 6

      5.1         Earthworks .................................................................................................................................................... 6

      5.1.1            Site Preparation ...................................................................................................................................... 6

      5.1.2            Excavations ............................................................................................................................................. 6

      5.1.3            Trafficability ............................................................................................................................................. 6

      5.1.4            Filling....................................................................................................................................................... 6

      5.2         Building Foundations .................................................................................................................................... 7

      5.2.1            Indicative Site Classification .................................................................................................................... 7

      5.2.2            Footing Design ........................................................................................................................................ 7

      5.3         Retaining Wall Design .................................................................................................................................. 8

      5.4         Permanent Drainage..................................................................................................................................... 8

6.0   ACID SULFATE SOIL ASSESSMENT ...................................................................................................................... 9

      6.1         Information on Acid Sulfate Soil .................................................................................................................... 9

      6.2         Field Screen Analysis ................................................................................................................................... 9

      6.3         Quantitative Laboratory Analysis ................................................................................................................ 10

      6.4         Risk Characterisation.................................................................................................................................. 10

7.0   MANAGEMENT RECOMMENDATIONS ................................................................................................................. 10

8.0   LIMITATIONS .......................................................................................................................................................... 11




25 August 2017
Report No. 17265-001-Rev0                                                              iii