07/2023 - Response to Information Request [As Published] · 132007.2023

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ACID SULFATE MANAGEMENT PLAN
FOR A PROPOSED DEVELOPMENT AT

59 Wyuna Court, Noosa Heads

1. INTRODUCTION

Bio-Track Pty Ltd has been commissioned by Middap Ditchfield Pty Ltd to prepare an
acid sulfate soit management plan (ASSMP) for a proposed development at 59 Wyuna
Court, Noosa Heads. This study is based upon soil chemical analysis data and site
drawings. A copy of this information is included as Appendix 1.

2. SUMMARY OF CONTROL MEASURES

 

The soil is not regarded as acid sulfate soil. Fifteen samples have been tested using the
field screen test method and three have been selected for analysis using the chromium
reducible sulphur test suite. The highest value for equivalent sulphur is 0.006%. This is
well below the threshold value of 0.03% as defined by the QASSIT guidelines. The soil
has the appearance of clean silica (beach) sand. The soil is not regarded as acid sulfate
soil and an acid sulfate soil management plan is not required.

In the event excavation during construction reveals an unexpected change in material
then then further excavation should be prevented. This change may be a significant
change in soil texture (eg. from sand to silty sand/clay etc) or a change in colour (eg.
from white to grey/black/brown) . Soil sampling and analysis of the material should then
be performed. This should involve either SPOCAS or the chromium reducible sulphur
test sulle. A minimum of two samples should be tested using one of these
methods.

If the test results show the equivalent sulphur concentration exceeds 0.03% then lime
treatment will be required. A description of this treatment process is included with this
report. It is stressed that lime treatment would only be required if:

a) the soil conditions change, and ,

b) subsequent analysis shows there is a need for lime treatment.