Reference Document - RAL25/0020 & OPW25/0194 (As Published)

237894.00.ASS

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                                                                                      Sample information                                                                                                      Screening test results                                                                                       Laboratory analysis results (acid base accounting)

                       Depth from (m)




                                                              Reduced level




                                                                                                                                                                                                                                                                                                                                                                                                     corroborated
                                        Depth to (m)
     Location ID




                                                                                                                                                                                                                                                           pH change




                                                                                                                                                                                                                                                                                                                                                                                                                    (Y/N or NA)


                                                                                                                                                                                                                                                                                                                                                                                                                                    Net acidity
                                                                                                                                                                                                 (pH units)




                                                                                                                                                                                                                        (pH units)




                                                                                                                                                                                                                                                                       (pH units)




                                                                                                                                                                                                                                                                                             (pH units)
                                                                                                                                                                                                                                     Reaction
                                                                                                                                                                       Adopted




                                                                                                                                                                                                                                                strength
                                                                                                                                                                                 texture




                                                                                                                                                                                                                                                                                                                                                                                ANCBT
                                                                              (AHD)




                                                                                                                                                                                                                pHFOX




                                                                                                                                                                                                                                                                                     pHKCl




                                                                                                                                                                                                                                                                                                                                                                                               ANC
                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                              (%S)




                                                                                                                                                                                                                                                                                                                                                           (%S)




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                                                                                                                                                                                                                                                                                                                                                                                        (%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
                       Depth from (m)




                                                              Reduced level




                                                                                                                                                                                                                                                                                                                                                                                                     corroborated
                                        Depth to (m)
     Location ID




                                                                                                                                                                                                                                                           pH change




                                                                                                                                                                                                                                                                                                                                                                                                                                    Net Acidity
                                                                                                                                                                                                                                                                                                                                                                                                                    (Y/N or NA)
                                                                                                                                                                                                 (pH units)




                                                                                                                                                                                                                        (pH units)




                                                                                                                                                                                                                                                                       (pH units)




                                                                                                                                                                                                                                                                                             (pH units)
                                                                                                                                                                                                                                     Reaction
                                                                                                                                                                                                                                                Strength
                                                                                                                                                                       Adopted
                                                                                                                                                                                 Texture




                                                                                                                                                                                                                                                                                                                                                                                ANCBT
                                                                              (AHD)




                                                                                                                                                                                                                pHFOX




                                                                                                                                                                                                                                                                                     pHKCl




                                                                                                                                                                                                                                                                                                                                                                                               ANC
                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                 (%S)




                                                                                                                                                                                                                                                                                                                                              (%S)




                                                                                                                                                                                                                                                                                                                                                           (%S)




                                                                                                                                                                                                                                                                                                                                                                         (%S)




                                                                                                                                                                                                                                                                                                                                                                                        (%S)




                                                                                                                                                                                                                                                                                                                                                                                                                                                  (%S)
                                                                                                                                                                                                                                                                                                                                                                  SNAS
                                                                                                                                                                                                                                                                                                                                                     TAA
                                                                                                                                                                                           pHF




                                                                                                                                                                                                                                                                                                                          SHCl
                                                                                                                                                                                                                                                                                                          SKCl




                                                                                                                                                                                                                                                                                                                                        Scr
                                                                                                                 Sample Description
- Assessment criteria are considered a reasonable initial screening for AASS or PASS
- 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 exceptions 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 anticipated 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.