J001701-006-R-Rev1_Medihub_Geo

Stockwell



      6.8 Acid Sulfate Soils
The development of acid sulfate soils (ASS) is commonly the result of marine or estuarine deposition of
sulfate and iron bearing sediments in the presence of an abundant source of readily decomposable organic
matter resulting in the deposition of pyrite. This pyrite is stable within the soil so long as anoxic conditions
prevail. Oxidation of this material produces acidic conditions and oxidation typically occurs as the material is
exposed above the water table by excavation, and by lowering the water table during dewatering processes.
The investigation found that the site is underlain by residual soils, which are not associated with ASS on the
basis of their geological origin. ASS were not encountered in the investigation, including below RL 5 m AHD.
The results of the investigation therefore indicate that testing or management of acid sulfate soils is not
warranted for this site.

7.0     LIMITATIONS
Should you require any further information please contact the undersigned. We draw your attention to the
document, Limitations, which is included in Appendix D.




Core Consultants Pty Ltd




Walter Mastenbroek
MEngPr (Civil) MSc (Env) BSc (Hons) MIEAust CPEng NER RPEQ 16149
Associate Director/Senior Geotechnical Engineer




Geoff Hurley
MSc DIC C.Geol RPEQ 5716
Managing Director/Principal Geotechnical Engineer


WM/GAH/wm

A.B.N. 75 603 384 050




J001701-006-R-Rev1                                                                                   Page 10