Reference Document - Acid Sulfate Soil Report 11_2023- OPW23_0189 · OPW26/0094

                  Project No. PG-10899                                                                                                         Page | 6
                  November 2023
                  Ref: PG-10899, 2023-10-16, ASR VER 3
                  DD Sunnyside CD Sunnyside Pty Ltd – Acid Sulfate Soil Investigation - Proposed Residence, 30 Mossman Court, Noosa Heads




                 of the screening tests were used to assist in the selection of samples for more detailed,
                 quantitative laboratory testing.

                 Chromium Suite Analysis

                 Chromium suite analysis was undertaken to quantify existing soil acidity and potential
                 future acid generation from possible ASS. Soil samples were refrigerated until
                 transported to Pacific Geotech’s laboratory, under standard chain of custody
                 protocol. A summary of results is given in Table 2.

                 TABLE 2                           CHROMIUM SUITE TESTING SUMMARY

                                                                                Nett Acidity                                     Liming Rate
                  BH No.                Depth (m)
                                                                                 (mol H+/t)                                     (kg CaCO3/t)
                   BH 01                       1.0                                   <5                                               <1
                   BH 01                       2.0                                   11                                               <1
                   BH 01                       3.0                                   23                                                2
                   BH 01                       4.0                                   35                                                3

                 Summary

                 On the basis of the testing undertaken, some samples provided nett acidity values
                 above the QASSIT defined action criteria at depths greater than 3m below ground
                 level. Therefore, soils disturbed on-site should be treated in accordance with the
                 attached Acid Sulfate Soil Management Plan.

                 The results of the laboratory testing are appended to this report.




Document Set ID: 22828362
Version: 1, Version Date: 26/02/2024