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SUMMARY

ACARP Project C35018 Reactive Ground Testing.
Rolleston samples of confidential data.

Testing of samples using AEISG code testing for reactivity over a period of 7 days.

CONDUCTED FOR: ROLLESTON COAL - GLENCORE

REQUESTED BY: NICOLE PHILLIPS

REPORT NO.: QMR19-05-24

results:

Each sample was assessed for reactivity risk based on pH,  carbonate content, reactive sulphide content and coal content using the QMR Reactive Ground Test .  Four samples had visible pyrite under microscopic examination (refer to Figure 4, Figure 5, Figure 6 and Figure 7). Three  sample that were tested had a reactive sulphide content above trace.  This samples were alkaline with a pH of 7.5 which  limited the temperature isotherm of the AEISG test to < 1°C  (refer to  Figure 1, Figure 2 and Figure 3).

Table 1 Received samples

Table 2 Results for Testing for QMR and AEISG Methods

Figure 1 - AEISG Test of C13122_ER05 showing 0.8°C temperature isotherm on heating:

Figure 2 - AEISG Test of C13122_ER10 showing 6°C temperature isotherm on heating:

Figure 3 - AEISG Test of C13125_ER09 showing 0.5°C temperature isotherm on heating:

Figure 4 – Sample C13122_ER05 showing visible pyrite under microscope:

Figure 5 – Sample C13122_ER10 showing visible pyrite under microscope:

Figure 6 – Sample C13125_ER09 showing visible pyrite under microscope:

Figure 7 – Sample C13121_ER16 showing visible pyrite under microscope:

Conclusion:

All samples were found to be not reactive.

Assessed By:

Dr G. Cavanough

Date:

24th May 2024

References:

• Test data files: rga18. xlxs, templog18.csv, templog19.csv, templog21.csv, templog24.csv and Rollestone_QMR19-05-24_all results.xlxs