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Geotech Report Reference Document OPW19-0239 · OPW19/0239
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December 2018 TABLE C1 - SUMMARY OF ACID SULFATE SOIL FIELD AND LABORATORY ANALYSIS RESULTS J000799-002-R-Rev0
Quick Screening Test Existing Acidity Potential Acidity Acid Neutralising Capacity Retained Acidity Acid Base Accounting
acidity -
AASS PASS Chromium Acid acidity - Acid sulfidic - Acid acidity - Net sulfidic - Net KCl HCl ANC
Required Lime Rate
Titratable Chromium Net Acid Net Acidity Net Acidity
pHF pHFOX Reaction Remark pH KCl Reducible Neutralising Neutralising Neutralising Acid Soluble Acid Soluble Extractable Extractable Fineness
likelihood1 likelihood 2 Actual Acidity Reducible Soluble Sulfur (sulfur units) (acidity units)
Sulfur Capacity Capacity Capacity Sulfur Sulfur Sulfur Sulfur Factor
BH ID Depth (m) BH Sulfur
pH Unit pH Unit pH Unit mole H+ / t %S mole H+ / t % CaCO3 mole H+ / t % pyrite S %S mole H+ / t % pyrite S %S %S %S mole H+ / t kg CaCO3/t kg CaCO3/m3
0.0_0.25 BH1_0.0_0.25 6.1 L 3.9 M 2
0.25_0.5 BH1_0.25_0.5 6 L 3.7 M 2 5.3 2.9 < 0.005 <3 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 < 0.02 < 10 <1 1
0.5_0.75 BH1_0.5_0.75 6.1 L 4.3 L 2
0.75_1.0 BH1_0.75_1.0 6.4 L 4.3 M 1
1.0_1.25 BH1_1.0_1.25 6.4 L 3.4 M 1
BH1
1.25_1.5 BH1_1.25_1.5 5.9 L 2.3 H 4 4.7 8.6 0.07 41.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.07 49 3.7 7
1.5_1.75 BH1_1.5_1.75 6.3 L 2.4 H 4
1.75_2.0 BH1_1.75_2.0 6.3 L 2.5 H 4
2.0_2.25 BH1_2.0_2.25 6.3 L 2.4 H 4
2.25_2.5 BH1_2.25_2.5 6.2 L 2.2 H 4 4.7 12.0 0.16 98.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.16 110 8.3 15
2.5_2.75 BH1_2.5_2.75 6.1 L 2.3 H 4
2.75_3.0 BH1_2.75_3.0 6.1 L 2.2 H 4
0.0_0.25 BH2_0.0_0.25 5.6 L 3.6 M 2
0.25_0.5 BH2_0.25_0.5 6.1 L 4.4 L 2
0.5_0.75 BH2_0.5_0.75 6 L 3.6 M 2
0.75_1.0 BH2_0.75_1.0 6.3 L 4.2 M 1
1.0_1.25 BH2_1.0_1.25 5.5 L 2.7 H 4 4.8 8.6 0.05 30.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.05 39 2.9 5
1.25_1.5 BH2_1.25_1.5 6.1 L 2.3 H 4
BH2
1.5_1.75 BH2_1.5_1.75 6 L 2.3 H 4
1.75_2.0 BH2_1.75_2.0 5.8 L 2.3 H 4 4.8 7.2 0.10 59.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.10 67 5.0 9
2.0_2.25 BH2_2.0_2.25 5.8 L 2.5 H 4
2.25_2.5 BH2_2.25_2.5 5.8 L 2.3 H 4
2.5_2.75 BH2_2.5_2.75 5.6 L 2.2 H 4 4.7 12.0 0.12 72.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.12 84 6.3 11
2.75_3.0 BH2_2.75_3.0 5.6 L 2.3 H 4
0.0_0.25 BH3_0.0_0.25 6.2 L 3.5 M 3
0.25_0.5 BH3_0.25_0.5 6.4 L 3.7 M 3
0.5_0.75 BH3_0.5_0.75 6.3 L 4.1 M 3
0.75_1.0 BH3_0.75_1.0 6.3 L 4.6 L 3
1.0_1.25 BH3_1.0_1.25 5.6 L 4.1 L 3
1.25_1.5 BH3_1.25_1.5 5.2 L 3.4 L 2
BH3
1.5_1.75 BH3_1.5_1.75 5.1 L 3 H 4 4.9 7.4 0.01 <3 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 < 0.02 12 <1 1
1.75_2.0 BH3_1.75_2.0 5.1 L 2.5 H 4
2.0_2.25 BH3_2.0_2.25 5.2 L 2.5 H 4 4.7 13.0 0.12 77.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.15 91 6.8 12
2.25_2.5 BH3_2.25_2.5 5.1 L 2.4 H 4
2.5_2.75 BH3_2.5_2.75 5.4 L 2.2 H 4 4.9 11.0 0.08 50.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.08 62 4.6 8
2.75_3.0 BH3_2.75_3.0 5.6 L 2.5 H 4
0.0_0.25 BH4_0.0_0.25 6.8 L 4.2 M 3
0.25_0.5 BH4_0.25_0.5 6.9 L 4.1 M 3
0.5_0.75 BH4_0.5_0.75 6.9 L 4.6 M 2
0.75_1.0 BH4_0.75_1.0 6.9 L 4.6 M 2
1.0_1.25 BH4_1.0_1.25 6.8 L 4.4 M 2
BH4
1.25_1.5 BH4_1.25_1.5 6.2 L 3.2 M 1 5.0 4.0 0.01 <3 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 < 0.02 12 <1 1
1.5_1.75 BH4_1.5_1.75 6 L 2.3 H 4
1.75_2.0 BH4_1.75_2.0 6.2 L 2.3 H 4
2.0_2.25 BH4_2.0_2.25 6.1 L 2.2 H 4 4.9 7.0 0.13 82.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.13 89 6.7 12
2.25_2.5 BH4_2.25_2.5 6.1 L 2.2 H 4
2.5_2.75 BH4_2.5_2.75 6.3 L 2.4 H 4
2.75_3.0 BH4_2.75_3.0 6.3 L 2.2 H 4 4.9 7.4 0.12 74.0 n/a n/a n/a n/a n/a n/a n/a n/a 1.5 0.12 81 6.1 11
1. Actual Acid Sulfate Soil (AASS) likelihood is indicated by Low (L & no shade)(pHF > 5), Medium (M & yellow shade)(pHF 5 ≤ pHF < 4) and High (H & red shade)(pHF ≤ 4).
2. Potential Acid Sulfate Soil (PASS) likelihood is indicated by Low (L & no shade)(∆ pH from pHF to pHFOX is < 2 pH units), Medium (M & yellow shade)(∆ pH from pHF to
pHFOX is ≥ 2 pH units OR pHFOX is <3)) and High (H & red shade)(∆ pH from pHF to pHFOX is ≥ 2 pH units AND pHFOX is <3)
3. Reaction (1) L = Low strength, (2) M = Medium strength, (3) H = High strength, (4) X = Extreme strength.
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