Sunshine Butterflies - Attachment D - 010816-2

                                           OUR BACKYARD
                                           468 MCKINNON DRIVE, COOROIBAH



Table of Contents
1.0   INTRODUCTION .................................................................................................................................................1

2.0   PROPOSED DEVELOPMENT .............................................................................................................................1

3.0   METHOD OF INVESTIGATION............................................................................................................................1

      3.1         Fieldwork ................................................................................................................................................1

      3.2         Laboratory Testing ..................................................................................................................................2

4.0   THE SITE ............................................................................................................................................................2

5.0   SUBSURFACE INVESTIGATION FINDINGS .......................................................................................................5

      5.1         Regional Geology....................................................................................................................................5

      5.2         Subsurface Conditions ............................................................................................................................5

      5.3         Laboratory Test Results ..........................................................................................................................5

6.0   ENGINEERING ASSESSMENT ...........................................................................................................................6

      6.1         Earthworks..............................................................................................................................................6

      6.1.1            Site Preparation and Trafficability .......................................................................................................6

      6.1.2            Excavations.......................................................................................................................................6

      6.1.3            Filling ................................................................................................................................................6

      6.2         Building Foundations...............................................................................................................................7

      6.2.1            Indicative Site Classification ...............................................................................................................7

      6.2.2            Footing Design ..................................................................................................................................7

      6.3         Retaining Structures................................................................................................................................8

      6.4         Pavement Design....................................................................................................................................8

      6.5         Permanent Drainage ...............................................................................................................................8

7.0   ON-SITE EFFLUENT DISPOSAL.........................................................................................................................9

      7.1         Wastewater Flow Design Allowance ........................................................................................................9

      7.2         Terrain-Soil Assessment..........................................................................................................................9

      7.3         Recommendations ..................................................................................................................................9

      7.3.1            Treatment & Land Application ............................................................................................................9

      7.3.2            System Positioning ..........................................................................................................................10

      7.3.3            System Construction........................................................................................................................11

      7.3.4            Maintenance and Inspection.............................................................................................................11

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




4 May 2016
Report No. 16081-001-Rev0                                                            ii