Acid Sulfate Report

                                                                             Table B1 - Summary of ASS Laboratory Testing                                                                                                      Ref: 17265

                                                                                                                                                Titratable           Chromium
                                                                                                    PASS                               pH
                                               pHF        AASS liklihood     1
                                                                                  pHFOX                             Reaction                     Actual              Reducible         sANC_BT               Required Lime Rate
      Depth                                                                                      likelihood2                           KCl
                      Soil Type                                                                                                                  Acidity               Sulfur
       (m)
                                             pH Unit                             pH Unit                           X to XXXX pH Unit            mole H+ / t             %S            mole H+ / t        kg CaCO3/t          kg CaCO3/m3
BH1   0.0-0.25                                  7.2                L                5.1               M                   3
                      Silty SAND
      0.25-0.5                                  7.1                L                4.5               M                   3             7.1         <2                < 0.005                 71              N/R                   N/R
      0.5-0.75                                  7.4                L                5.4               M                   2
      0.75-1.0                                  7.4                L                5.2               M                   2
      1.0-1.25                                  7.4                L                5.1               M                   2             6.4         <2                < 0.005                 n/a             N/R                   N/R
                         SAND
      1.25-1.5                                  7.2                L                5.0               M                   2
      1.5-1.75                                  7.2                L                4.6               M                   2
      1.75-2.0                                  6.2                L                2.4               H                   4             5.9         <2                 0.023                  n/a             N/R                   N/R
BH2   0.0-0.25                                  6.3                L                2.8               H                   4
                      Silty SAND
      0.25-0.5                                  6.3                L                2.9               H                   3
      0.5-0.75                                  6.3                L                4.3               M                   2             5.7         <2                < 0.005                 n/a             N/R                   N/R
      0.75-1.0                                  6.3                L                4.6               L                   2
      1.0-1.25                                  6.1                L                2.7               H                   4             5.4         <2                 0.039                  n/a              1.8                  3.3
                         SAND
      1.25-1.5                                  6.1                L                2.3               H                   4
      1.5-1.75                                  6.1                L                2.5               H                   4             5.3         <2                 0.062                  n/a              2.9                  5.2
      1.75-2.0                                  5.8                L                2.2               H                   4
       Notes:    1. Actual Acid Sulfate Soil (AASS) liklihood is indicated by Low (L & no shading)(pH F > 5). Medium (M & yellow shade)(pHF 5 ≤ pHF < 4) and High (H & red shade)(pHF ≤ 4).
                 2. Potential Acid Sulfate Soil (PASS) liklihood is indicated by Low (L & no shading, where pHFOX is > 4 and ∆ pH from pHF to pHFOX is < 2 pH units). Medium (M & yellow shade, where ∆ pH from pHF to pHFOX is ≥ 2 pH
                 units OR pHFOX is <3)) and High (H and red shade)(change from pHF to pHFOX is ≥2 pH units AND pHFOX is <4)
                 3. Reaction 1 = Nil to slight reaction, 2 = Moderate reaction, 3 = Strong reaction (persistant froth), 4 = Extreme reaction.
                 4. Shaded TAA & SCR results are those exceeding the QASSIT action levels of 18 mol H+/t or 0.03 %S.
                 5. Required Lime Rate is calculated from the net Acid-Base Account with a factor of safety = 1.5 and bulk density of 1.8 t/m³. N/R = Not Required