07/1571 - Response to Information Request [As Published] · 142007.1571

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Project 305-2325
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The positions of boreholes have been located over the site of the proposed
redevelopment in order to provide representative coverage of subsurface conditions.

The classification of soils in the field is subjective, based on the experience and
judgement of the supervising geotechnician and some variations in the soil description,
from the actual material type may occur. In order to reduce any inconsistencies which
may have occurred, the field descriptions have been corrected, where appropriate, to
reflect the available laboratory test results.

The soil classification descriptions, field and laboratory testing were carried out in general
accordance with the following Australian Standards. ‘

¢ AS.1726 - 1993 ‘ Geotechnical Site Investigations
* AS.1289 Methods of Testing Soils for Engineering Purposes
* State Planning Policy 2/02 Planning and Managing Development Involving

~ Acid Sulfate Soils
* Queensland Acid Sulfate Soils Investigation Team (QASSIT)
“Guidelines for Sampling and Analysis of Lowland Acid Sulfate Soils (ASS) in
Queensland” October 1998 (Revision 4.0).
“Soil Management Guidelines’ November 2002 (Version 3.8).

A description of the investigation method, borehole records and a site plan showing the
location of the boreholes are included in the Appendices.

4.3 Laboratory Testing

The scope of ASS testing has been carried out in accordance with the Guideline to State
Planning Policy 2/02.

Two stages of laboratory testing were undertaken for this project as part of the acid
sulfate soil (ASS) testing program. A total of 34 No. soil samples were submitted to the
staged ASS testing program.

5.3.1 Preliminary Screening Tests

The first stage consisted of the initial qualitative screening of the disturbed samples,
conducted using the field pH (pHr) and oxidised (pHrox) test method to provide
preliminary assessment of the presence of Acid Sulfate Soils (ASS). This testing was in
the form of assessing the pH of the sample before and following oxidation with 30%

 

# SOIL SURVEYS ENGINEERING