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Preliminary Site Investigation G CR Tabs_Appendices:Layout 1 14/5/09 3:15 PM Page G Appendix G Contaminated Land Preliminary Site Investigation G FINAL REPORT Caval Ridge, Contaminated Land Preliminary Site Investigation Prepared for BHP Billiton Mitsubishi Alliance Level 33 Riparian Plaza 71 Eagle Street Brisbane, QLD, 4001 24 October, 2008 42626265 J:\Jobs\42626158\8000 - Deliverables\8002 - Final - DIP review\Detailed Review-copy eRoom a\23_Appendices\G Preliminary Site Investigation (PSI)\R002 Caval Ridge - Preliminary site investigation (Report) 090212.doc Caval Ridge, Contaminated Land Preliminary Site Investigation CAVAL RIDGE, CONTAMINATED LAND PRELIMINARY SITE INVESTIGATION Project Manager: URS Australia Pty Ltd Chris Morrison Associate Environmental Level 14, 240 Queen Street Geologist Brisbane, QLD 4000 GPO Box 302, QLD 4001 Project Director: Australia Tel: 61 7 3243 2111 Fax: 61 7 3243 2199 Chris Pigott Senior Principal Date: 24 October, 2008 Reference: 42626158-R001c Status: Final Prepared for BHP Billiton Mitsubishi Alliance, 24 October, 2008 J:\Jobs\42626158\8000 - Deliverables\8002 - Final - DIP review\Detailed Review-copy eRoom a\23_Appendices\G Preliminary Site Investigation (PSI)\R002 Caval Ridge - Preliminary site investigation (Report) 090212.doc CAVAL RIDGE, CONTAMINATED LAND PRELIMINARY SITE INVESTIGATION Contents Contents Executive Summary ............................................................................................ES-1 1 Introduction ................................................................................................... 1-1 1.1 Purpose.........................................................................................................................1-1 1.2 Site Description............................................................................................................ 1-1 1.3 Scope of Works, Objective and Methodology........................................................... 1-2 2 Site Information............................................................................................. 2-1 2.1 Land Use....................................................................................................................... 2-1 2.1.1 Current land use ............................................................................................ 2-1 2.1.2 Proposed Development................................................................................. 2-1 2.2 Environmental Setting................................................................................................. 2-1 2.2.1 Geology and Soil ........................................................................................... 2-1 2.2.2 Topography ................................................................................................... 2-2 2.2.3 Surface Hydrology and Hydrogeology........................................................... 2-2 2.2.4 Groundwater Extraction................................................................................. 2-2 2.2.5 Ecological Health........................................................................................... 2-3 3 Site History Review....................................................................................... 3-1 3.1 Title Searches............................................................................................................... 3-1 3.2 Aerial Photographs.................................................................................................... 3-12 3.3 Review of Government Registers ............................................................................ 3-13 3.3.1 Vegetation Management Notices ................................................................ 3-13 3.3.2 Environmental Protection Agency (EPA)..................................................... 3-13 4 Site Investigation .......................................................................................... 4-1 4.1 Northern Section.......................................................................................................... 4-1 4.2 Southern Section ......................................................................................................... 4-1 5 Potential Contamination Sources................................................................ 5-1 5.1 Northern Section.......................................................................................................... 5-1 5.2 Southern Section ......................................................................................................... 5-4 5.3 Possible Unidentified Contamination Sources......................................................... 5-6 6 Proposed Development and Site Management .......................................... 6-1 7 Soil Analyses................................................................................................. 7-1 7.1 Sampling Methodology ............................................................................................... 7-1 Prepared for BHP Billiton Mitsubishi Alliance, 24 October, 2008 J:\Jobs\42626158\8000 - Deliverables\8002 - Final\Detailed Review-copy eRoom\23_Appendices\G Preliminary Site Investigation (PSI)\R002 Caval Ridge - Preliminary site investigation (Report) 090212.doc 1 CAVAL RIDGE, CONTAMINATED LAND PRELIMINARY SITE INVESTIGATION Contents 7.2 Applicable Investigation Levels ................................................................................. 7-1 7.2.1 Soil Investigation Levels................................................................................ 7-1 7.3 Analytical Results ........................................................................................................ 7-4 7.3.1 Total Petroleum Hydrocarbons...................................................................... 7-4 7.3.2 BTEX ............................................................................................................. 7-4 7.3.3 Heavy Metals................................................................................................. 7-4 7.3.4 Phenols.......................................................................................................... 7-4 7.3.5 Polynuclear Aromatic Hydrocarbons ............................................................. 7-4 7.3.6 PCBs.............................................................................................................. 7-4 8 Analytical Data Validation ............................................................................ 8-1 8.1.1 Methodology .................................................................................................. 8-1 8.1.2 Analytical Data Quality – Field Data Quality.................................................. 8-1 8.1.3 Laboratory Quality Control............................................................................. 8-2 9 Conclusions................................................................................................... 9-1 10 References................................................................................................... 10-1 Prepared for BHP Billiton Mitsubishi Alliance, 24 October, 2008 J:\Jobs\42626158\8000 - Deliverables\8002 - Final\Detailed Review-copy eRoom\23_Appendices\G Preliminary Site Investigation (PSI)\R002 Caval Ridge - Preliminary site investigation (Report) 090212.doc 2 CAVAL RIDGE, CONTAMINATED LAND PRELIMINARY SITE INVESTIGATION Tables, Figures, Plates & Appendices Tables, Figures, Plates & Appendices Tables Table 3-1 Current and Historical Titles: ML1775 MDLA 364 and MDLA366 ...................................... 3-2 Table 3-2 Historical Aerial Photograph Survey ................................................................................. 3-12 Table 7-1 Applicable Soil Investigation Levels.................................................................................... 7-3 Figures Figure 1 Project site Figure 2 Land Tenure Figure 3 Areas of Potential Contamination Figure 4 Potential Contamination Locations affected by Mining Plan Error! No table of figures entries found. Plates Plate 1 Truck washing pad - Kalari Yard....................................................................................... 10-4 Plate 2 Wash down sediment trap - Kalari Yard ........................................................................... 10-5 Plate 3 Maintenance Pit - Kalari Yard ........................................................................................... 10-5 Plate 4 In-ground Waste Oily Water/sediment tank - Kalari Yard................................................. 10-5 Plate 5 Paints and storage room - Kalari Yard Cattle yard and shed - Lot 13 on SP 151669...... 10-6 Plate 6 Rinsed Chemical Containers - Kalari Yard ....................................................................... 10-6 Plate 7 Empty Chemical Containers - Kalari Yard ........................................................................ 10-7 Plate 8 Empty Chemical containers and Equipment - Kalari Yard................................................ 10-7 Plate 9 Empty Fuel Containers - Kalari Yard ................................................................................ 10-8 Plate 10 Waste Oily Rags and filters - Kalari Yard ......................................................................... 10-8 Plate 11 Waste Skips - Kalari Yard................................................................................................. 10-9 Plate 12 Oils storage and Lubrication room – Kalari Yard.............................................................
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