Geotechnical Investigation

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                                                                                      Sunshine Coast | Brisbane | Gold Coast




•   The chromium reducible sulfur values (SCR) where greater than 0.01 %S indicates a significant level of sulfide,
    and where greater than 0.03 %S then the soil has a potential acidity level exceeding the QASSIT guideline value.
• Where the total actual acidity (TAA) value exceeds 18 mol/t then the soil has an acidity level exceeding the
    QASSIT guideline value.
• Where the sulfur in KCl extract values (SKCl) is less than 0.01 %S, then the soil has little or no history of sulfide
    oxidation. A low SKCl combined with a low SCR indicates the soil is not an acid sulfate soil and further development
    of acid is likely to be low.
Generally, the action criterion from the chromium suite of tests, which triggers a requirement for ASS disturbance to
be managed, derived from the Soil Management Guidelines is as follows:
•   Net Acidity (TAA + SCR + SNAS) of greater than or equal to 0.03 %S for disturbances of greater than 1000 tonnes.

The action criterion was exceeded in no samples tested.
The complete treatment and neutralisation of the naturally occurring acidic soils is considered not necessary. The
acidity found naturally in non-ASS soils is not typically damaging to the environment and indeed the ecology. Some
environments are naturally acidic and support ecologies adapted to those acidic conditions.




ATTACHMENTS
About Your Geotechnical Report
Interpretation of the Subsurface Sheets
Client Supplied Information (Soil Report by others)
Test Pit Logs
Practice Note Guidelines for Landslide Risk Management




Sunshine Coast | Brisbane | Gold Coast