Geotechnical Level 1 Supervision Report Donald Road, Redland Bay.

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2 TG Geotechnical Level 1 Supervision Report Donald Road, Redland Bay. Frostdale Civil Contractors TOTAL GEOTECHNICS Adelaide, Ballarat, Brisbane, Hallam, Hoppers Crossing, Traralgon, Warrnambool

3 Contents 1. Introduction Scope of Works Inspections/Supervision Testing Conclusion Limitation of This Report... 5 Appendix 1 Site Plan... 6 Appendix 2 Testing Summary... 8 Appendix 3 Site Photographs Appendix 4 NATA Lab Results

4 1. Introduction Total Geotechnics was engaged by Frostdale Civil Contractors on the 15 May 2015, to provide Level 1 Geotechnical Supervision Services in respect of the project lands sited at Donald Road, Redland Bay (Refer Appendix 1 Site Plans & Diagrams and Appendix 3 Site Photographs). This Geotechnical Level 1 Supervision Report (Level 1 Report) presents the results of supervision activities, compaction and moisture control, material placement and laboratory testing for earthworks afforded at Donald Road, Redland Bay. This Level 1 report covers construction activities carried out from the 15th May to the 11 th September Scope of Works The scope of works involved the placement of On-site General Fill. The General Fill material was placed in Level 1 fill areas, in accordance with the provisions of AS , Guidelines on earthworks for commercial and residential developments. For the purposes of AS , the depth of FILL placed was less than 5 metres. General fill material utilised in respect of the Level 1 earthworks was locally sourced on-site. The Gerenal Fill Material comprised of Silt, Sand and Clay Materials. The approved engineering drawings and specifications had the additional requirements that all General Fill Materials once placed achieved a minimum 95% compaction and had a moisture content variation of less the plus or minus 2% of optimum moisture content. 3. Inspections/Supervision Full time Level 1 supervision and inspections were undertaken between; 15th May and the 11 th September 2015, including supervision and inspections regarding the stripping and removal as per AS Section 3, including the removal of: Organic soils, such as topsoils, severely root affected subsoils and peat; Contaminated soils ( Contaminated Soils were a part of the Brief ); Materials which undergo volume change or loss of strength when disturbed and exposed to moisture; Silts, or materials that have deleterious engineering properties of silt; Other materials with properties that are unsuitable for the forming of structural fill; Fill that contains wood, metal plastic, boulders or other deleterious material, in sufficient proportions to affect the required performance of the fill. The maximum particle size of any rocks or other lumps, within the layer has not exceeded two thirds ( 2 / 3) of the compacted layer thickness. 3

5 The lots inspected were essentially homogeneous in relation to material type and moisture condition, rolling response and compaction technique. Prior to placement any existing filled ground, for which the conditions of the placement are not adequately documented, have not been assumed to have been of either standard compaction or of the composition adequate to support fill or any loads, has been removed (AS3798 Section 2o). 4. Testing The Project was classified as Residential Development for the purposes of AS (refer Table 5.2), thereby requiring a minimum compaction result of 95% Standard Compaction for the cohesive soils (AS 1289 Section & 5.1.1) present. AS further requiresd that a minimum of 3 tests per day be afforded in respect of the fill material being placed (refer AS3798 Table 8.1) Testing was afforded using a Nuclear Density Gauge for field density determination per AS 1289 Section Field testing was at a rate of 3 field density tests per day s production, per the minimum requirements of AS Field Testing was similarly afforded in respect of each layer of fill placed. The filling operation was undertaken between the 15 th May and the 11 th of September The material was Site-derived General Fill. Material was placed in approximately 300mm loose layers, with compaction afforded by a 825 Compactor, the compactor sealing off each layer (of General Fill material). The individual loose layers were in-turn compacted to an approximate layer depth of 200mm. The individual layers were field tested to ensure the necessary compaction standard (95% Standard Compaction) was achieved, per Australian Standard requirements. The methodology adopted was considered the best method to achieve compaction using the plant and machinery available. A moisture tolerance of plus or minus 2% of optimum moisture content was required per AS Section 5.3. The moisture content was similarly controlled within both the upper layer of uncompacted material and the material of the previously compacted layer, per (AS Section 6.2.3). As per AS Section 5.3, where reactive soils were used as fill, the placement moisture content was maintained within the specified range of % of the optimum moisture content, per (AS Section 5.7.1) or alternatively moisture variations were limited to 2%. A total of No.29 Field density and Laboratory Hilf Compaction tests were performed. The reports verify the achievement of the minimum density requirement of 95% Standard Compaction throughout the full depth of the fill area, with each layer tested accordingly. All test results were provided to our client Frostdale Civil Contractors for inclusion within their internal quality system (Refer to Appendix B Summary of Results). At the completion of the structural layers any material within 150mm of permanent subgrade level in cuttings was subjected to test rolling; test rolling was undertaken and the layers withstood test rolling without visible deformation or springing (AS Section 5.5). 4

6 The lots that are covered by this Geotechnical Level 1 Supervision Report are listed in the table below. Table 1 - Lots under Level 1 Supervision Lot,74 Lot,75 Lot,76 Lot,77 Lot,78 Lot,79 Lot,90 Lot,91 Lot,82 Lot,83 Lot,84 Lot,85 Lot,86 Lot,87 Lot,88 5. Conclusion On the completion of the earthworks and after analysing the materials used, it has been concluded that the filling procedure conducted by Frostdale Civil Contractors satisfied the requirements of AS 3798 in regards to the placement of fill materials on a project under Level 1 Supervision and in accordance with the project specification as provided to Total Geotechnics. This report has been prepared for the benefit of our client with respect to the particular brief given to us and it may not be relied upon in other contexts or for any other purpose without our prior review and agreement. No responsibility for this report will be taken by Total Geotechnics if it is altered in any way, or not reproduced in full. 6. Limitation of This Report This Level 1 Report is valid for a period of twelve months following completion of Level 1 Supervision. Total Geotechnics Pty Ltd does not accept responsibility for any distortion or deviations of measurements as reported at the given time. This report will be considered invalid if: Any works were conducted on site without the supervision of a Total Geotechnics Pty Ltd technician. Any other unforeseeable event and any event outside of time as described above. Prepared by: Authorised by: Albert Roelofs (Brisbane Laboratory Manager) Geotechnical Officer- Nata Accreditation Mob: Alvin Tan (BE Civil and Infrastructure) GradIEAust Geotechnical Engineer Mob:

7 Appendix 1 Site Plan 6

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9 Appendix 2 Testing Summary 8

10 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation Remark Report no. RL: (%) Sample No. 4 Lot 74 RL:10.48 General Fill 28/05/ % 0.5 Report No. 7 Sample No. 5 5m- Northern Boundary 8m- Eastern Boundary Lot 75 Wetter RL:10.49 General Fill 28/05/ % 2 Report No. 7 Sample No. 6 9m- Northern Boundary 9m- Eastern Boundary Lot 76 Drier RL:10.23 General Fill 28/05/ % 1.5 Report No. 7 Sample No. 7 9m- Northern Boundary 5m- Eastern Boundary Lot 75 Wetter RL:10.84 General Fill 29/05/ % 0.5 Report No. 8 Sample No. 8 15m-Northern BDY 18m- Western BDY Lot 76 Drier RL:10.58 General Fill 29/05/ % 0.0 Report No. 8 Sample No. 9 18m- Northern BDY 4m- Western BDY Lot 77 OMC RL:10.22 General Fill 29/05/ % 0.5 Report No. 8 9m- Northern Boundary 8m- Western Boundary Wetter 9

11 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation Remark Report no. RL: (%) Sample No. 10 Lot 77 RL:10.02 General Fill 01/06/ % 0.0% Report No. 9 Sample No m- Northern BDY 5m- Eastern Boundary Lot 76 OMC RL:10.55 General Fill 01/06/ % 0.0% Report No. 9 Sample No. 12 4m- Northern Boundary 4m- Western Boundary Lot 75 OMC RL:10.88 General Fill 01/06/ % 2% Report No. 9 Sample No. 13 4m- Eastern Boundary 12m- Southern BDY Lot 74 Drier RL:10.79 General Fill 02/06/ % 2% Report No. 10 Sample No. 14 6m- Southern BDY 8m- Eastern BDY Lot 74 Drier RL:10.82 General Fill 02/06/ % 1.5% Report No. 10 Sample No. 15 3m- Eastern Boundary 21m- Northern BDY Lot 76 Drier RL:10.68 General Fill 02/06/ % 0.5% Report No. 10 5m- Western Boundary 5m- Southern BDY Wetter 10

12 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation Remark Report no. RL: (%) Sample No. 16 Lot 78 RL:10.52 General Fill 03/06/ % 0.5% Report No. 11 Sample No. 17 9m- Southern BDY 3m- Eastern BDY Lot 79 Wetter RL:10.39 General Fill 03/06/ % 0.0% Report No. 11 Sample No. 18 6m- Southern Boundary 8m- Eastern BDY Lot 77 OMC RL:10.33 General Fill 03/06/ % 0.0% Report No. 11 5m- Southern BDY 4m- Eastern BDY OMC Sample No. 19 Lot 79 RL:10.01 General Fill 04/06/ % 0.0% Report No. 12 Sample No. 20 4m- Northern BDY 7m- Western BDY Lot 80 OMC RL:10.08 General Fill 04/06/ % 1.5% Report No. 12 Sample No. 21 5m- Northern BDY 4m- Western BDY Lot 81 Drier RL:9.98 General Fill 04/06/ % 2% Report No. 12 5m- Northern BDY 4m- Western BDY Drier 11

13 Sample no. & Report no. Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation Remark RL: (%) Sample No. 22 Lot 79 RL:10.45 General Fill 05/06/ % 1.5% Report No.13 Sample No m- Northern BDY 6m- Western BDY Lot 80 Drier RL:10.35 General Fill 05/06/ % 0.5% Report No. 13 Sample No m- Northern BDY 2m- Western BDY Lot 81 Wetter RL:10.28 General Fill 05/06/ % 2% Report No. 13 Sample No m- Northern BDY 8m- Western BDY Lot 79 Drier RL:10.70 General Fill 09/06/ % 0.0% Report No. 14 Sample No. 26 4m- Southern BDY 9m- Western BDY Lot 80 OMC RL:10.59 General Fill 09/06/ % 0.5% Report No. 14 Sample No. 27 6m- Southern BDY 3m- Western BDY Lot 81 Wetter RL:10.60 General Fill 09/06/ % 1.5% Report No. 14 5m- Southern BDY 5m- Western BDY Wetter 12

14 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Remark Report no. RL: Variation (%) Sample No. 28 Lot 88 RL:10.58 General Fill 10/06/ % 1.0% Report No. 15 5m- Northern BDY 7m- Eastern BDY Wetter Sample No. 29 Lot 87 RL:10.81 General Fill 10/06/ % 0.5% Report No m- Northern BDY 5m- Eastern BDY Wetter Sample No. 30 Lot 87 RL:10.67 General Fill 10/06/ % 0.5% Report No. 15 8m- Northern BDY 12m- Eastern BDY Wetter Sample No. 31 Lot 88 RL:10.46 General Fill 25/06/ % 1% Report No.17 10m- Southern BDY 11m- Eastern BDY Wetter Sample No. 32 Lot 88 RL:10.56 General Fill 25/06/ % 0.5% Report No. 17 5m- Eastern BDY 16m- Southern BDY 98.5% Sample No. 33 Lot 88 RL:10.79 General Fill 25/06/ % 0.5% Report No.17 6m- Western BDY 17m- Southern BDY Wetter 13

15 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Remark Report no. RL: Variation (%) Sample No. 34 Lot 87 RL:10.52 General Fill 02/07/ % 0.5% Report No m- Southern BDY Wetter 5m- Western BDY Sample No. 35 Lot 87 RL:10.90 General Fill 02/07/ % 1% Report No m- Southern BDY Wetter 8m- Eastern BDY Sample No. 36 Lot 87 RL:11.20 General Fill 02/07/ % 1% Report No m- Southern BDY Sample No m- Western BDY Lot 83 RL:10.30 General Fill 03/07/ % 0.5% Report No.19 20m- Southern BDY Wetter 15m- Western BDY Sample No. 38 Lot 84 RL:10.55 General Fill 03/07/ % 0.5% Report No m- Southern BDY Wetter 15m- Western BDY Sample No. 39 Lot 84 RL:10.72 General Fill 03/07/ % 0.0% Report No.19 20m- Southern BDY OMC 15m- Western BDY 14

16 Sample no. & Report no. Location Layer RL: Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation (%) Remark Sample No. 40 Lot 83 RL:10.52 General Fill 04/07/ % 1.0% Report No m- Northern BDY 3m- Western BDY Drier Sample No. 41 Lot 83 RL:10.78 General Fill 04/07/ % 1.0% Report No.20 7m- Southern BDY 5m- Eastern BDY Drier Sample No. 42 Lot 84 RL:11.10 General Fill 04/07/ % 1.0% Report No.20 Sample No. 43 9m- Southern BDY 6m- Western BDY Lot 84 Drier RL:11.23 General Fill 06/07/ % 2.0% Report No m- Northern BDY 4m- Western BDY Drier Sample No. 44 Lot 84 RL:11.50 General Fill 06/07/ % 1.5% Report No m- Southern BDY 8m- Eastern BDY Drier Sample No. 45 Lot 83 RL:10.95 General Fill 06/07/ % 0.5% Report No. 21 7m- Southern BDY 7m- Western BDY Drier 15

17 Sample no. & Location Layer Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Remark Report no. RL: Variation (%) Sample No. 46 Lot 83 RL:11.10 General Fill 07/07/ % 1.0% Report No. 22 2m- Southern BDY 4m- Eastern BDY Drier Sample No. 47 Lot 84 RL:11.31 General Fill 07/07/ % 0.5% Report No. 22 Sample No. 48 5m- Southern BDY 6m- Western BDY Lot 85 Wetter RL:10.40 General Fill 07/07/ % 0.5% Report No. 22 Sample No m- Northern BDY 4m- Western BDY Lot 86 Drier RL:10.54 General Fill 08/07/ % 1.0% Report No m- Northern BDY 5m- Western BDY Drier Sample No. 50 Lot 87 RL:10.71 General Fill 08/07/ % 0.5% Report No. 23 9m- Southern BDY 3m- Western BDY Drier Sample No. 51 Lot 88 RL:12.04 General Fill 08/07/ % 0.5% Report No m- Northern BDY 9m- Eastern BDY Wetter 16

18 Sample no. & Report no. Location Layer RL: Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation (%) Remark Sample No. 52 Lot 85 RL:10.82 General Fill 14/07/ % 1.0% Report No m- Northern BDY 5m- Western BDY Drier Sample No. 53 Lot 86 RL:10.54 General Fill 14/07/ % 1.0% Report No.24 16m- Northern BDY 4m- Western BDY Drier Sample No. 54 Lot 81 RL:10.03 General Fill 14/07/ % 1.0% Report No.24 5m- Southern BDY 5m- Eastern BDY Drier Sample No. 55 Lot 81 RL:10.35 General Fill 15/07/ % 0.0% Report No. 25 Sample No m- Northern BDY 8m- Western BDY Lot 85 OMC RL:10.98 General Fill 15/07/ % 1.5% Report No m- Northern BDY 14m- Western BDY Wetter Sample No. 57 Lot 86 RL:10.80 General Fill 15/07/ % 2.0% Report No. 25 8m- Southern BDY 5m- Eastern BDY Wetter 17

19 Sample no. & Report no. Location Layer RL: Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation (%) Remark Sample No. 58 Lot 86 RL:10.60 General Fill 16/07/ % 0.5% Report No m- Northern BDY 7m- Eastern BDY Wetter Sample No. 59 Lot 85 RL:11.31 General Fill 16/07/ % 0.0% Report No.26 10m- Southern BDY 8m-Eastern BDY OMC Sample No. 60 Lot 81 RL:11.26 General Fill 16/07/ % 0.0% Report No.26 9m- Northern BDY 6m- Western BDY OMC Sample No. 88 Lot 82 Finish Layer General Fill 26/08/ % 1.0% Report No. 40 Sample No m- Northern BDY 16m- Western BDY Lot 86 Wetter Finish Layer General Fill 26/08/ % 1.0% Report No m- Northern BDY 6m- Western BDY Wetter Sample No.90 Lot 84 Finish Layer General Fill 26/08/ % 0.5% Report No.40 9m- Northern BDY 8m- Eastern BDY Wetter 18

20 Sample no. & Report no. Location Layer RL: Material Type Date Tested Oversize (%) Density Ratio (%) Moisture Variation (%) Remark Sample No. 93 Lot 86 Finish Layer General Fill 11/09/ % 0.0% Report No m- Northern BDY 9m- Western BDY OMC Sample No. 94 Lot 87 Finish Layer General Fill 11/09/ % 0.0% Report No.42 11m- Northern BDY 13m- Western BDY OMC Sample No. 95 Lot 88 Finish Layer General Fill 11/09/ % 0.0% Report No.42 6m- Northern BDY 14m- Eastern BDY OMC 19

21 Appendix 3 Site Photographs 1. Lots 74 & 75, Visual Inspection Of existing materials on-site. 20

22 2.Lots 74 &75, Visual Inspection of existing materials on-site. 3.Level one filling, Lots 76,77 &78. 21

23 4. Level one filling, Lots 79,80 &

24 5. Stripped Surface of Lots 81,82 83 &

25 6.Lots 88 Level one Filling 7.Stripped Surface, Lots 82 24

26 8. Strip Surface Proof Roll, Lots 84 &

27 9. Start of project Lots 76 to

28 10. Stripped Surface Inspection, Lots 85 &

29 11. Stripped Surface Inspection, Lot

30 12. Stripped Surface Inspection, 88 to

31 Appendix 4 NATA Lab Results 30

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