SUPERSEDED Reference Document

Acid Sulfate Soil Test Results v1.2
© January 2024 Douglas Partners Pty Ltd




                                                                                      Sample Information                                                                                                      Screening Test Results                                                                                      Laboratory Analysis Results (Acid Base Accounting)


                       Depth from (m)




                                                              Reduced level




                                                                                                                                                                                                                                                                                                                                                                                                     Corroborated
                                        Depth to (m)
     Location ID




                                                                                                                                                                                                                                                                                                                                                                                                                              Net Acidity
                                                                                                                                                                                                                                                           pH change
                                                                                                                                                                                                 (pH units)




                                                                                                                                                                                                                        (pH units)




                                                                                                                                                                                                                                                                       (pH units)




                                                                                                                                                                                                                                                                                             (pH units)
                                                                                                                                                                                                                                     Reaction
                                                                                                                                                                                                                                                Strength
                                                                                                                                                                       Adopted
                                                                                                                                                                                 Texture




                                                                                                                                                                                                                                                                                                                                                                                ANCBT
                                                                              (AHD)




                                                                                                                                                                                                                pHFOX




                                                                                                                                                                                                                                                                                     pHKCl




                                                                                                                                                                                                                                                                                                                                                                                                                    (Y/N)
                                                                                                                                                                                                                                                                                                                                                                                               ANC
                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                              (%S)




                                                                                                                                                                                                                                                                                                                                                           (%S)




                                                                                                                                                                                                                                                                                                                                                                         (%S)




                                                                                                                                                                                                                                                                                                                                                                                        (%S)




                                                                                                                                                                                                                                                                                                                                                                                                                                            (%S)
                                                                                                                                                                                                                                                                                                                                                                  SNAS
                                                                                                                                                                                                                                                                                                                                                     TAA
                                                                                                                                                                                           pHF




                                                                                                                                                                                                                                                                                                                          SHCl
                                                                                                                                                                                                                                                                                                          SKCl




                                                                                                                                                                                                                                                                                                                                        Scr
                                                                                                                 Sample Description
                                                                                                                                                                                                                                                                                                                        Coarse texture: sands to loamy sands and peats                                                            0.03
                                                                                                                                      Assessment Criteria (pH units)                        <4                     <3                           -               1.0                 Action Criteria (%S) Medium texture: clayey sand to light clays                                                                         0.06a/0.03b
                                                                                                                                                                                                                                                                                                                        Fine texture: light medium to heavy clays                                                           0.1a/0.03b
- pHF<4 is indicative of the presence of Actual ASS (AASS), although it is not conclusive of ASS on its own as naturally occurring non ASS soils can have pH F<5
- pHFOX<3 or pH Change ≥1 may indicate potential ASS (PASS), although exception apply. Laboratory testing required to confirm presence of Reduced Inorganic Sulfur (RIS)
- Refer to Table 5.1, A2, A3 of Sullivan,L. et al (2018) for further details
                   Shaded results trigger action (i.e. equal to or exceed the action criteria). Criteria is specific for soil texture and anticpated tonnage of soil disturbed.
Net Acidity can only include the measured ANC where the ANC has been corroborated by other data (for example slab incubation data) that demonstrates the soil material does not experience acidification during complete oxidation under field conditions.
a - Action criterion for disturbance of 1-1000 tonnes of material
b - Action criterion for disturbance of more than 1000 tonnes of material
The action criteria apply only to ASS materials and not to other acidic soils such as acidic peatlands and coastal heaths.