Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

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         Sample                                                                        Screening Test Indicators
                            Material
Bore      Depth                               Reaction     pHF     pHFox       Strong reaction
           (m)               Type                                                                     pHF-pHFOx>1      pHFOx<3
                                                                                with Peroxide
         0.0-0.25        Fill and Sand         Weak        5.2      3.0                                   3
         0.25-0.5             Sand           Very Weak     4.5      3.1                                   3
         0.5-0.75             Sand           Very Weak     5.0      3.8                                   3
         0.75-1.0             Sand     -     Very Weak     4.9      5.3
         1.0-1.25             Sand           Very Weak     5.0      5.2
         125-1.5              Sand           Very Weak     4.8 '    3.6                                   3
         1.5-1.75             Sand           Very Weak     5.3      5.1
         1.75.2.0             Sand           Very Weak     5.6     5.8
         2.0-2.25             Sand           Very Weak     5.9     5.8
         2.25-2.5             Sand           Very Weak     6.1     5.9
         0.0-0.25        Fill and Sand         Weak        6.2     4.8                                    3

         0.25-0.5             Sand           Very Weak     5.4     4.1                                    3

         0.5-0.75            Sand            Very Weak   5.3       5.5
         0.75.1.0            Sand            Very Weak 1 4.9       5.2
         1.0-1.25            Sand            Very Weak   5.7       5.6
 4
         125-1.5             Sand            Very Weak   5.9       5.1
         1.5-1.75            Sand            Very Weak 15.5        5.5
         1.75-2.0            Sand            Very Weak   5.9       5.5
       12.0-2.25               Sand          Very Weak   6.0       5.5
         2.25-2.5              Sand          Very Weak   5.9       5.6
         0.0-0.25           Silty Sand         Weak      5.5       2.3                                    3
         0.25-0.5     Silty Sand and Sand      Weak      5.7       2.4                                    3
         0.5-0.75 ,            Sand            Weak      6.1       4.1                                    3
                                                                                                 I.       3
         0.75-1.0              Sand            Weak      5.8       4.3
                                                                           i
       ! 1.0-1.25              Sand          Very Weak   5.0        4.9
 5
         1.25-1.5              Sand          Very Weak   4.9        5.0
         1.5-1.75              Sand          Very Weak   5.2        5.7
         1.75-2.0              Sand          Very Weak   5.8        5.6
         2.0-2.25              Sand          Very Weak   5.7        5.6
         2.25-2.5              Sand          Very Weak   5.9        5.6
         0.0-0.25           Silty Sand         Weak      6.2 '      3.9                                   3
                                                                           (
         0.25-0.5     Silty Sand and Sand    Very Weak   6.3        5.0                                   3
         0.5-0.75              Sand          Very Weak 5.9          5.4
         0.75-1.0              Sand          Very Weak 6.2          5.7
         1.0-1.25              Sand          Very Weak   5.9        4.4                                   3
 6
         1.25-1.5              Sand          Very Weak   6.1        5.8
         1.5-1.75            Sand            Very Weak     5.6      5.8
         1.75-2.0            Sand            Very Weak     5.8      5.7
         2.0-2.25            Sand            Very Weak     5.4      5.1
         2.25-2.5            Sand            Very Weak     5.9      5.7


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

 ResidenUal Development                                                                                             Pago7of10
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 Project Na 07160                                                                                               18 June 2007