Geotech Report - Acid Sulfate Soil Assessment

 

 

 

 

 

 

 

 

  
 

 

~ Screening Test Indicators

 

| Strong reaction
with peroxide

pHr-pHrox>1 | pHrox<3

 

 

 

 

 

 

 

 

 

 

 

Semple Material
Bore | Depth Reaction | pHr | pHrox
Type
Sb i | : Sk
0.0-0.25 Fill and Sand Weak | 5.2
0.25-0.5 | “Sand SSs|s«CVery Weak | 4.5
05-0.75| ~~ Sand Very Weak | 5.0
ee Ma ee fag
; ry Weak | 50 |
Very Weak | 4.8
Sand " VeryWeak | 5.3 | 5.
Sand | VeryWeak | 5.6 | 58
Sand ———™s«WVery Weak | 559 | 5.8
Sand Very Weak | 6.1 | 5
FillandSand | Weak | 62 |
Sand Very Weak | 5.4
i Sand ‘| Very Weak | 5.3
Sand | VeryWeak | 49] 52 |
r Sand | VeryWeak | 5.7 | 56
Sand VeryWeak | 5.9 | 5.1
Sand Very Weak | 5.5 | 55
Sand | VeryWeak | 5.9 | 5.5
Sand VeryWeak | 6.0 | 55
Sand | VeryWeak | 59 | 56
Silty Sand Weak | 5.5 | 23
Silty Sand and Sand Weak 57 | 24
7 Sand Weak | 64] 44
Sand Weak | 58] 43 |
5 | 10425 Sand | Very Weck | 5.0) 48 |
1.25-1.5 Sand Very Weak | 4.9 | 5.0
4.51.75 Sand Very Weak | 5.2 | 5.7
1.75-2.0 Sand VeryWeak | 5.8 | 5.6
(20-225) Sand VeryWeak | 5.7 | 56 |
2.25-2.5 Sand Very Weak | 5.9 | 56 |
/ 0.0-0.25 Silty Sand | Weak | 62| 39
0.25-0.5 | Silty Sand and Sand Very Weak | 6.3 | 5.0_
05-075| Sand VeryWeak | 5.9 | 54 | |
0.75-1.0 Sand Very Weak | 6.2 | 57
| 104.25 _ Sand | VeryWeak | 5.9 | 44 -
4.25-1.5 Sand Very Weak | 6.1 | 5.8
1.5-4.75 Sand —Sséd|s«VeryWeak | 5.6 | 58
75-20} Sand  —~'| *‘VeryWeak | 58) 57 |
Sand “Very Weak | 5.4] 5.1
“Sand | VeryWeak | 5.9] 57 |

 

 

 

 

 

 

 

 

 

v
v
v
7

 

 

 

The results of the screening tests indicate reactions ranging from very weak to very strong after the addition of
hydrogen peroxide; pHrox values 1 pH unit below the pH value measured in nearly all the samples analysed;
and a significant number of samples analysed yielded pHrox values below 3 pH units.

 

Residential Development
215-219 David Low Way, Peregian Beach

Project No. 07160

Page 7 of 10

18 June 2007