J000154-001-R-Rev0_ASS Investigation Report · RAP15/0034

J000154-001-R-Rev0                                                                                              November 2015


as is gives more accurate indications of pyrite content where significant amounts of organic matter (and
organic derived acidity) are present in the soil samples.
An overall acid-base accounting method was used to calculate a ‘net acidity’ value which is used to qualify
analytical test results and calculate liming rates. This equation is:

     Net Acidity = Actual Acidity (as TAA) + Retained Acidity (as SNAS) + Potential Acidity (as SCR) - insitu Acid
                  Neutralising Capacity (ANC).

The Eurofins laboratory certificates of analysis, chain of custody documents and laboratory quality control
documents are attached in Appendix B and the results are summarised in Table B1. Observations and
discussion on the laboratory findings are given in Sections 6.5 and 6.6.

6.0         RESULTS OF THE INVESTIGATION
6.1           Published Data
Available geological information3 indicates that the site is underlain by Quaternary age “Anthropogenic
deposits: landfill, mine tailings and rubble”.
An extract of the regional geology map is shown below in Plate 2.




                                                                                                Approximate Site Location




Plate 2: Extract of Regional Geology Map

Published ASS information4 shows that the site is zoned DLCs “Disturbed land – canal estate, likely to
contain ASS, treatment may or may not have been carried out”.




3
    1:100,000 Series Gympie Special Geological Map, Sheet 9445 & Part 954, First Edition 1999
4
 1:100,000 Acid Sulfate Soils, Redcliffe to Teewah, Map 2 (DNR-SEA-I-AO-3235), Department of Natural Resources & Mines, First
Edition 1999



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