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

geotechnical • goo -environm°ea'ta`1 • groundwater
                                                                                                      Butler Partners Pty Ltd
                                                                                                              ARM '4 6'& 574 6GE
                                                                                                         79 Doggett Street
                                                                                                Newstead Queensland 4006
                                                                                                             P 0 Box 2267
                                                                                                       Fortitude Valley BC
                                                                                                         Qur,r.nsl;dna 4006

       Project No. 007-160A                                                                     www.btitIorpartnera.com.au

                                                                                                          Pb 61 7 3852 3800
       12 July 2010                                                                                       is 61 7 3852 3808
                                                                                            enquiries.butlerpartners corn an



       Matrix Pty Ltd
       PO Box 3220
       LOGANHOLME QLD 4129


       Email:         [email protected]


       Attention:     Mr C Sloan



       Dear Clint



       RE:           ACID SULFATE SOILS
                     ESSENCE OF PEREGIAN
                     215 - 219 DAVID LOW WAY, PEREGIAN BEACH


       1.0 INTRODUCTION

       Butler Partners has carried out an Acid Sulfate Soil (ASS) assessment at the site and the results of the
       assessment are detailed in the following report:

                Acid Sulfate Soil Assessment
                Residential Development
                215 - 219 David Low Way, Peregian Beach
                Project No: 07160       Dated: 18 June 2007

        The ASS assessment comprised the drilling and sampling of six bores with samples taken for laboratory
        testing. The subsurface conditions encountered in the bores generally comprised a surface layer of either fill
        material, that varied up to a maximum depth of 0.8m, or silty sand to a maximum depth of 0.4m. In two
        bores drilled in the lower lying, western part of the site, the fill was underlain by natural, dark grey-brown silty
        clays that were underlain in turn by silty sands that were indurated below 2m depth. In the eastern part of
        the site, where the majority of the development is understood to be proposed, the surface fill or silty sand
        layer was underlain by sands.

        The results of the laboratory testing indicated that, in general, the fill material and natural sands and silty
        sands were not ASS. The natural silty clays indicated levels of actual acidity below laboratory reporting
        limits, with one exception from a bore at the western edge of the proposed development area. The silty
        clays were therefore considered to include an apparently limited amount of ASS, potentially at isolated
        locations.




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