RFI - Attachment G - Acid Sulfate Soils Investigation

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Figure 1: Overview of the site, viewing north with Bore 1 in foreground




3.     Regional Geology and Acid Sulfate Soil Conditions

Reference to the Geological Survey of Queensland’s 1:100,000 series digital geological maps indicate
the site is located on the boundary between Quaternary aged floodplain alluvium typically comprising
“clay, silt, sand, gravel” and Late Triassic to Early Jurassic aged Tiaro Coal Measures typically
comprising “Lithofeldspathic labile and sublabile to quartzose sandstone, siltstone, shale, coal,
ferruginous oolite marker”. The alluvium is expected to be underlain by the older Tiaro Coal Measures.

The natural subsurface conditions encountered typically comprised silty sand overlying sandy and silty
clays, inferred likely to be alluvial soils which is broadly consistent with the above described geology.

Reference to the Department of Natural Resources and Mines 1:100,000 Redcliffe to Teewah Acid
Sulfate Soils Map 2 indicates that the site is located in an area of “Land <5m AHD with low probability
of ASS occurrence”.

The presence or otherwise of ASS was assessed through laboratory testing. The results of laboratory
testing are discussed further in Sections 6 and 7.2.2 of this report.




Acid Sulfate Soils Investigation, Proposed Medical Centre                              94967.00.R.001.docx
36 & 40 Hofmann Drive, Noosaville                                                                May 2019