SBSMR 20004 Revision D - Response to RFI

CONTENTS

SUMMARY .....................................................................................................................................................................1

1. INTRODUCTION ..........................................................................................................................................................3

2. SITE CHARACTARISTICS ..............................................................................................................................................4

       2.1 Topography ......................................................................................................................................................4

       2.3 Soils ..................................................................................................................................................................4

       2.4 Vegetation .......................................................................................................................................................4

       2.5 Environmental Values ......................................................................................................................................4

3. SEDIMENT & EROSION CONTROL ..............................................................................................................................5

       3.1 Erosion Potential..............................................................................................................................................5

4. SITE DRAINAGE INVESTIGATION ................................................................................................................................5

       4.1 Design Rainfall Intensities ................................................................................................................................5

       4.2 Performance Requirements .............................................................................................................................5

       4.3 Concept Stormwater Management Layout .....................................................................................................6

5. WATER QUANTITY .....................................................................................................................................................7

       5.1 Piped Drainage System – Pre-Development ....................................................................................................8

       5.2 Piped Drainage System – Post Development...................................................................................................9

6. WATER QUALITY ......................................................................................................................................................10

       6.1 Stormwater Quality Objectives ......................................................................................................................10

       6.2 Stormwater Quality Modelling ......................................................................................................................11

       6.3 Treatment Systems Required ........................................................................................................................11

       6.4 Results............................................................................................................................................................12

10. CONCLUSIONS & RECOMMENDATIONS .................................................................................................................13

12. REFERENCES ...........................................................................................................................................................13

10.APPENDICES ............................................................................................................................................................... i