Reference Document - RAL25/0020 & OPW25/0194 (As Published)

Table of Contents

                                                                                                                                                                         Page No

1.     Introduction ..................................................................................................................................................................... 1

2.     Site Description ............................................................................................................................................................. 1

3.     Regional Geology and Acid Sulfate Soil Conditions ............................................................................. 2
       3.1         Regional Geology ........................................................................................................................................... 2
       3.2         Acid Sulfate Soils ............................................................................................................................................. 3

4.     Field Work ........................................................................................................................................................................ 3
       4.1         Field Work Methods ..................................................................................................................................... 3
       4.2         Field Work Results ......................................................................................................................................... 3

5.     Laboratory Testing...................................................................................................................................................... 4
       5.1         Shrink-Swell Index ......................................................................................................................................... 4
       5.2         Plasticity and Particle Size Distribution ........................................................................................... 4
       5.3         Compaction and Soaked CBR ............................................................................................................... 5
       5.4         Dispersion ........................................................................................................................................................... 5
       5.5         Acid Sulfate Soils ............................................................................................................................................. 5

6.     Comments ....................................................................................................................................................................... 6
       6.1         Trafficability ........................................................................................................................................................ 6
       6.2         Site Preparation and Earthworks ........................................................................................................ 6
       6.3         Excavation ........................................................................................................................................................... 7
       6.4         Batter Slopes ..................................................................................................................................................... 8
       6.5         Soil Reactivity and Site Classification ................................................................................................ 8
       6.6         Foundations ....................................................................................................................................................... 9
       6.7         Retaining Walls.............................................................................................................................................. 10
       6.8         Pavements ......................................................................................................................................................... 11
       6.9         Acid Sulfate Soils ........................................................................................................................................... 12

7.     References ..................................................................................................................................................................... 14

8.     Limitations ..................................................................................................................................................................... 14




Proposed Subdivision                                                                                                                                                 237894.00.R.001.Rev0
12-14 Gympie Street, Tewantin                                                                                                                                               October 2025