DETAILED SITE INVESTIGATION REPORT 35498 / 330 & 340 PORT HILLS ROAD / HILTON HAULAGE LTD 0800 999 333 [email protected] 11 Deans Avenue, Addington PO Box 589, Christchurch 8140 www.do.co.nz Davis Ogilvie & Partners Ltd Quality Assurance Title: Detailed Site Investigation – 330 & 340 Port Hills Road Client: Hilton Haulage Ltd File Location: T:\projects\35s\35498 - 24 Nuttall Drive and Desi Place\Environmental Science\004 Report\160923.csb.DSI.35498.docx Version: 1 Date: 17 October 2016 Project No: 35498 Prepared by: Charlotte Stephen-Brownie Signature: Engineering Geologist MSc Engineering Geology (Hons) BSc Geology & Geography Reviewed by: Andrew Bunce Signature: Engineering Geologist MSci Geology Authorised By: Warren Sharp Signature: Technical Director / SQEP Senior Environmental Scientist Detailed Site Investigation 330 & 340 Port Hills Road October 2016 Table of Contents 1.0 Introduction ................................................................................................................................. 1 1.1 Background ......................................................................................................................... 1 1.2 Objectives ........................................................................................................................... 1 1.3 Scope of Work..................................................................................................................... 2 2.0 Site Information ........................................................................................................................... 3 2.1 Site Identification ................................................................................................................. 3 2.1 Site Description and Surrounding Environment .................................................................. 3 2.2 Geology and Hydrogeology ................................................................................................ 5 2.3 Site History .......................................................................................................................... 6 3.0 Site Characterisation ................................................................................................................ 10 3.1 Land Use ........................................................................................................................... 10 3.2 Identified HAIL Activities ................................................................................................... 10 3.3 Potentially Relevant Receptors ......................................................................................... 10 4.0 Soil Sampling ............................................................................................................................. 11 4.1 Methodology ...................................................................................................................... 11 4.2 Soil Sampling Procedure .................................................................................................. 11 4.3 Laboratory Analysis .......................................................................................................... 12 4.4 Quality Assurance and Quality Control ............................................................................. 12 5.0 Results ....................................................................................................................................... 13 5.1 Applicable Soil Contaminant Standards ........................................................................... 13 5.2 Field Observations ............................................................................................................ 16 5.3 Soil Analytical Results ....................................................................................................... 16 5.4 Asbestos ........................................................................................................................... 16 6.0 Conclusions and Recommendations ...................................................................................... 17 6.1 Summary ........................................................................................................................... 17 6.2 Recommendations ............................................................................................................ 17 6.3 Regulatory Considerations (Contaminated Land) ............................................................. 18 6.4 Regulatory Considerations (Contaminated Land) ............................................................. 18 Appendix A – Environment Canterbury Listed Land Use Register Appendix B – Historic Aerial Photography Appendix C – Figure 5: Environmental Site Plan (DWG 700A) Appendix D – Test Pit Logs Appendix E – Results Tables Appendix F – Eurofins Environment Testing Australia Pty Ltd, CRL Energy and Chemsafety Detailed Site Investigation 330 & 340 Port Hills Road October 2016 Disclaimer This report has been prepared at the specific instructions of Peter Anderson of Hilton Haulage Ltd. Only Hilton Haulage Ltd and the Local and Regional Territorial Authorities are entitled to rely upon this report. Davis Ogilvie & Partners Ltd accepts no liability to anyone other than Hilton Haulage Ltd in any way in relation to this report and the content of it and any direct or indirect effect this report may have. Davis Ogilvie & Partners Ltd does not consider anyone else relying on this report or that it will be used for any other purpose. Davis Ogilvie did not complete an assessment of all possible conditions or circumstances that may exist at the site. Davis Ogilvie has provided an opinion based on information reviewed, site observations and investigations, and analysis methodologies current at the time of reporting. Variations in conditions may occur, and there may be conditions onsite which have not been revealed by the investigation, which have not been taken into account in the report. No warranty is included—either expressed or implied—that the actual conditions will conform to the assessments contained in this report. If any unexpected contamination is discovered during any soil disturbance works at the site, Davis Ogilvie should be notified to assess contamination conditions and possible management requirements. Some content of this report was created from maps and/or data extracted from the New Zealand Geotechnical Database (https://www.nzgd.org.nz/), which were prepared and/or compiled for the Earthquake Commission (EQC) to assist in assessing insurance claims made under the Earthquake Commission Act 1993. The source maps and data were not intended for any other purpose. EQC and its engineers, Tonkin & Taylor, have no liability for any use of the maps and data or for the consequences of any person relying on them in any way. This "Important notice" must be reproduced wherever this content or any derivatives are reproduced. Should anyone wish to discuss the content of this report with Davis Ogilvie & Partners Ltd, they are welcome to contact us on (03) 366 1653 or at 11 Deans Avenue, Christchurch. Detailed Site Investigation 330 & 340 Port Hills Road October 2016 Executive Summary Davis Ogilvie & Partners Ltd. has been engaged by Hilton Haulage Ltd to undertake a Detailed Site Investigation at 330 and 340 Port Hills Road, Hillsborough, Christchurch, where it has been proposed to amalgamate the existing lots and construct a custom built transport yard, beginning with construction of a new warehouse adjacent to Port Hills Road. Consideration has been given to data acquired from local resources including the New Zealand Geotechnical Database, Environment Canterbury, the Christchurch City Council Property File, and former reporting on the site. Data has also been collected during onsite investigations by Davis Ogilvie & Partners Ltd. Consideration Site Specific Details 24 Curries Road and 330, 340 and 344 Port Hills Road, Site Address Hillsborough, Christchurch Pt Lot 16 DP 15293 Title CB2B/396 Lot 1 DP 322331 Title 90845 Legal Description Lot 3 DP 322331 Title 90847 Lot 2 DP 81322 Title CB47A/1091 A10 – Persistent pesticide bulk storage or use A17 – Storage tanks or drums for fuel, chemicals or liquid waste Identified HAIL Activities A18 – Bulk storage of treated timber outside E1 – Asbestos products manufacture or disposal Heavy Metals, Organochlorine Pesticides, Polycyclic Aromatic Analytes Tested Hydrocarbons, Total Petroleum Hydrocarbons, Asbestos Analytes above background Heavy Metals, Polycyclic Aromatic Hydrocarbons Analytes above the selected Nil criteria for human health Concentrations of heavy metals exceed background levels in fill soils across the site. However, no samples exceed the recommended commercial trigger values, therefore a complete exposure pathway does not exist. In addition to elevated heavy metal concentrations, the stockpile and the bitumen layer at 0.5 m deep show elevated concentrations of polycyclic aromatic hydrocarbons. Any soil removed from the site during development will need to be disposed of at a facility authorised to accept it (such as Burwood Landfill). Under the NESCS (2011), the proposed subdivision (amalgamation) and soil disturbance will be a Controlled Activity, in accordance with Regulation 9 (1) and 9 (3) of the NESCS. A number of PAHs were detected at concentrations above the ANZECC ISQG-High guideline values in the bitumen layer at 0.5 m below EGL, as well as in the stockpile. In accordance with Environment Canterbury Land and