135 Lake Weyba Rd Earthworks Certification L1

     1     Introduction
    Civil Quality Assurance (CQA) have been engaged by Andres Gabarrin (AG) to provide
    Level 1 Geotechnical testing and inspection services, in accordance with AS 3798-2007
    Guidelines on earthworks for commercial and residential developments and AS 2870-2011
    Residential slabs and footings, at 135 Lake Weyba Drive, Noosaville, Queensland.
    Up to 2.5m of Fill has been placed on the site by AG and tested by CQA at the following
    locations:
    o      Lots 1, 2 and 4, 135 Lake Weyba Drive, Noosaville, Queensland
    Note - Lot 3 was not filled
    Test locations are shown in Appendix A.


     2     Site Description
     The site is located in a semi-rural area surrounded by residential developments and
     uncleared and semi cleared bushland. The site is approximately rectangular as shown in
     Appendix A. Prior to the works the site was a rural residential property comprising semi-
     cleared bushland.
     Up to 8,000m3 of fill material has been placed on the site by AG to a depth of up to 2.5m.
     Lot 2 was filled with Clay Fill and Lots 1 and 4 with Sand Fill.


     3     Fieldwork
     21 in-situ density tests along with 7 accompanying laboratory Proctor standard compaction
     tests and 14 Max Min Density Tests were undertaken on the site by CQA and in the CQA
     Laboratory on 20 September 2022. Dry Density Ratio and Density Index Reports
     compiled by Civil Quality Assurance Pty Ltd are detailed in Appendix B.
     During the in-situ testing the earthworks surface was observed and seen to be free of
     deleterious material.
     The amount and frequency of testing is sufficient to comply with Level 1 supervision in
     accordance with AS3798.


     4     Test results
     Lots 1 and 4 - Test results (Appendix B) indicate that the Sand fill has been compacted to
     between 82 and 87.5% of Density Index.
     Lot 2- Test results (Appendix B) indicate that the Clay fill has been compacted to between
     97.5% and 99% of Standard Maximum Dry Density at a moisture content of 0% to -2.5%
     of Optimum.




135 Lake Weyba Rd Earthworks Certification L1
                                                                                             March 23

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