Rowland Hassall School Relocation 49 Woodville Road, Chester Hill Contamination Investigation Report number: 15-GS91B August 2015 Prepared for NSW Department of Education A division of the Department of Finance, Services and Innovation Rowland Hassall School Relocation – 49 Woodville Road, Chester Hill – Contamination Investigation Rowland Hassall School Relocation 49 Woodville Road, Chester Hill Contamination Investigation Report number: 15-GS91B August 2015 Document Control Approved for Issue Issue / Revision Author Reviewer Name Date Final P. Anderson C. Karwaj P. Anderson 21.8.2015 Contact name Peta Anderson Level 14 McKell Building 2-24 Rawson Place Sydney NSW 2000 T: 02 9372 7834 F: 02 9372 7877 E: [email protected] W: www.publicworks.nsw.gov.au © Crown in right of NSW through the Department of Finance, Services and Innovation, 2015 This publication is copyright and may incorporate moral rights of an individual. 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Rowland Hassall School Relocation – 49 Woodville Road, Chester Hill – Contamination Investigation Table of contents 1 EXECUTIVE SUMMARY ....................................................................................................................1 2 INTRODUCTION ...............................................................................................................................4 2.1 General ................................................................................................................................. 4 2.2 Data Quality Objectives .......................................................................................................4 2.3 Objectives ............................................................................................................................5 2.4 Scope of Work ......................................................................................................................5 2.5 Proposed Development .......................................................................................................6 2.6 Limitations............................................................................................................................6 3 SITE IDENTIFICATION ......................................................................................................................6 4 SITE HISTORY ................................................................................................................................7 4.1 Section 149 Planning Certificate .........................................................................................7 4.2 WorkCover NSW – Dangerous Goods ................................................................................8 4.3 NSW Office of Environment and Heritage Records ...........................................................8 4.4 Land Title Records...............................................................................................................8 4.5 Historical Aerial Photographs .............................................................................................9 4.6 Other Documentation ........................................................................................................10 5 SITE CONDITIONS AND SURROUNDING ENVIRONMENT ....................................................................10 5.1 Zoning and Current Land Use ...........................................................................................10 5.2 Topography and Drainage ................................................................................................. 11 5.3 Site Inspection ...................................................................................................................11 5.4 Surrounding Land Use ......................................................................................................12 5.5 Local Sensitive Environment ............................................................................................ 12 6 GEOLOGY, HYDROGEOLOGY AND ACID SULFATE SOIL ...................................................................13 6.1 Geology ..............................................................................................................................13 6.2 Hydrogeology .....................................................................................................................13 6.3 Acid Sulfate Soil ................................................................................................................13 7 POTENTIAL ENVIRONMENTAL CONCERN ........................................................................................14 8 FIELD INVESTIGATION ...................................................................................................................15 8.1 Investigation Rationale ......................................................................................................15 8.2 Fieldwork ............................................................................................................................15 8.3 Field QA/QC........................................................................................................................15 9 LABORATORY INVESTIGATION .......................................................................................................16 9.1 Laboratory Analysis ..........................................................................................................16 9.2 Laboratory QA/QC .............................................................................................................18 10 ASSESSMENT CRITERIA.............................................................................................................18 NSW Public Works Rowland Hassall School Relocation – 49 Woodville Road, Chester Hill – Contamination Investigation 11 RESULTS AND SITE CHARACTERISTICS ......................................................................................22 11.1 General ...............................................................................................................................22 11.2 Ground Conditions ............................................................................................................22 11.3 Groundwater Conditions ...................................................................................................26 11.4 Soil Analytical Results ......................................................................................................27 11.5 Field and Laboratory QA/QC .............................................................................................28 11.6 Qualitative Assessment of Risk ........................................................................................29 12 CONCLUSION AND RECOMMENDATIONS .....................................................................................30 13 REFERENCES ............................................................................................................................31 Tables 1 Summary of Analytical Results - Heavy Metals, Cation Exchange Capacity (CEC), pH and Total Organic Carbon (TOC) 2 Summary of Analytical Results - Total Recoverable Hydrocarbons (TRH) / Benzene, Toluene, Ethylbenzene and Total Xylene (BTEX) 3 Summary of Analytical Results – Polynuclear (Polycyclic) Aromatic Hydrocarbons (PAHs) 4 Summary of Analytical Results - Organochlorine Pesticides (OCPs)/ Polychlorinated Biphenyls (PCBs) 5 Summary of Analytical Results – Asbestos Figures 1 Site Location Plan 2 Site Plan 3 Borehole Location Plan 4 100 Year ARI Flood Extent Map Plates 1 to 12 Appendices A Section 149 Planning Certificate B Land Title Records C Historical Aerial Photographs D Geotechnical Terminology E Borehole Logs F Analytical Results and Laboratory QA/QC Reports NSW Public Works Rowland Hassall School Relocation – 49 Woodville Road, Chester Hill – Contamination Investigation 1 Executive Summary Any party relying on this report is advised that this executive summary must be read in conjunction with the attached report of which this summary forms a part. Introduction Government Architects Office (GAO - NSW Public Works), on behalf of the NSW Department of Education (DoE), commissioned the Specialist Services Section (NSW Public Works, NSW Water Solutions) to undertake a Contamination