RFI - Attachment G - Acid Sulfate Soils Investigation

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       7.2.4 Verification Testing

Verification sampling intends to establish whether sufficient neutralising material has been added and
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if has been adequately mixed. A verification sample should be taken for every 1000 m of treated
AASS with analysis performed by either the Chromium or SPOCAS suite (including retained acidity).
Single, non-random grab samples are not recommended for this type of testing. Instead composite
samples taken according to a random or stratified-random protocol is recommended. Only
appropriately skilled personnel should collect and test verification samples.

Table 2: Target Levels of Neutralised Soil
           Test                      Component                       Target Level
Field screening of soil                    pHf                    Between 6.5 and 8.5
                                 Existing + potential
                                                                    Zero or negative
Acid base accounting                    acidity
 of soil (SPOCAS or
                                          pHKCl                   Between 6.5 and 8.5
  Chromium Suite)
                                      TAA of soil           Total Actual Acidity (TAA) < 0 %S

It should be noted that verification testing (ie. chromium suite tests) will require at least four days
turnaround, possibly longer, upon receipt by the testing laboratory. Hence sufficient time should be
allowed in the treatment programme for such verification testing.




8.     References

1.     Ahern CR, Ahern MR, and Powell, B (1998), “Guidelines for Sampling and Analysis of Lowland
       Acid Sulfate Soils (ASS) in Queensland 1998”, QASSIT, Department of Natural Resources,
       Resource Centre

2.     Ahern CR, McElnea AE, Sullivan LA (2004), “Acid Sulfate Soils Laboratory Methods Guidelines”
       Queensland Department of Natural Resources, Mines and Energy

3.     Dear SE, Moore NG, Dobos, SK, Watling KM, Ahern CR, and O’Brien lE (2014), “Queensland
       Acid Sulfate Soil Technical Manual: Soil Management Guidelines”, Department of Science,
       Information Technology, Innovation and the Arts




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