GE Aviation Systems Limited GE Aviation UK, Kings Avenue, Hamble-le-Rice, Southampton SO31 4NF Preliminary Risk Assessment 28854 R01 (00) FEBRUARY 2017 RSK GENERAL NOTES Project No.: 28854 R01 (00) Title: Preliminary Risk Assessment: GE Aviation UK, Kings Avenue, Hamble-le-Rice, Southampton, SO31 4NF Client: GE Aviation Systems Limited, Kings Avenue, Hamble-le-Rice, Southampton, SO31 4NF Date: 20th February 2017 Office: RSK Environment Limited, 18 Frogmore Road, Hemel Hempstead, Herts, HP3 9RT172 tel:44 01442 437500, contact: Jack Townsend Status: Final Author Jack Townsend Technical reviewer John Pulsford Signature Signature th th Date: 20 February 2017 Date: 20 February 2017 Project manager Jack Townsend Quality reviewer Pip Gobby Signature Signature th th Date: 20 February 2017 Date: 20 February 2017 RSK Environment Limited (RSK) has prepared this report for the sole use of the client, showing reasonable skill and care, for the intended purposes as stated in the agreement under which this work was completed. The report may not be relied upon by any other party without the express agreement of the client and RSK. No other warranty, expressed or implied, is made as to the professional advice included in this report. Where any data supplied by the client or from other sources have been used, it has been assumed that the information is correct. No responsibility can be accepted by RSK for inaccuracies in the data supplied by any other party. The conclusions and recommendations in this report are based on the assumption that all relevant information has been supplied by those bodies from whom it was requested. No part of this report may be copied or duplicated without the express permission of RSK and the party for whom it was prepared. Where field investigations have been carried out, these have been restricted to a level of detail required to achieve the stated objectives of the work. This work has been undertaken in accordance with the quality management system of RSK Environment Ltd. CONTENTS 1 INTRODUCTION .............................................................................................................................. 1 1.1 Scope ....................................................................................................................................... 1 1.2 Limitations ................................................................................................................................ 1 2 THE SITE ......................................................................................................................................... 3 2.1 Site location and description .................................................................................................... 3 2.2 Proposed development ............................................................................................................ 4 3 PRELIMINARY RISK ASSESSMENT (PRA) .................................................................................. 5 3.1 Site walkover ............................................................................................................................ 5 3.2 Ground conditions .................................................................................................................... 6 3.2.1 Geology ........................................................................................................................ 6 3.2.2 Radon ........................................................................................................................... 7 3.2.3 Mining and quarrying ................................................................................................... 7 3.2.4 Landfilling and land reclamation .................................................................................. 7 3.3 Hydrogeology ........................................................................................................................... 7 3.3.1 Aquifer characteristics .................................................................................................. 7 3.3.2 Groundwater / Surface Water Interactions .................................................................. 8 3.3.3 Licensed groundwater abstraction ............................................................................... 8 3.4 Hydrology ................................................................................................................................. 9 3.4.1 Surface watercourses .................................................................................................. 9 3.4.2 Site drainage ................................................................................................................ 9 3.4.3 Preliminary flood risk assessment ............................................................................... 9 3.5 History of site and surrounding area ........................................................................................ 9 3.5.1 Summary of Development History ............................................................................. 10 3.5.2 The Site ...................................................................................................................... 10 3.6 Sensitive land uses ................................................................................................................ 11 3.7 Licences and permissions ...................................................................................................... 11 3.8 Initial conceptual model ......................................................................................................... 11 3.8.1 Summary of potential contaminant sources ............................................................... 11 3.8.2 Sensitive receptors .................................................................................................... 12 3.8.3 Summary of plausible pathways ................................................................................ 12 3.8.4 Potentially complete pollutant linkages ...................................................................... 12 4 CONCLUSIONS AND RECOMMENDATIONS ............................................................................. 16 4.1 Conclusion ............................................................................................................................. 16 4.2 Recommendations ................................................................................................................. 16 4.2.1 Zone 1 ........................................................................................................................ 16 4.2.2 Zone 3 ........................................................................................................................ 16 4.2.3 Across entire site ....................................................................................................... 17 BIBLIOGRAPHY .................................................................................................................................. 18 GE Aviation Systems Limited i Preliminary Risk Assessment: GE Aviation, Hamble-le-Rice 28854 R01 (00) TABLES Table 1: Site environs ............................................................................................................................. 3 Table 2: Site Walkover ........................................................................................................................... 5 Table 3: Geology at the site .................................................................................................................... 6 Table 4: Geological Units in the Study Area and Hydrogeological Significance .................................... 8 Table 5: Summary of historical development ....................................................................................... 10 Table 6: Potential sources and types of contamination. ....................................................................... 12 Table 7: Risk estimation for potentially complete pollutant linkages .................................................... 14 FIGURES Figure 1 Site location plan Figure 2 Current layout APPENDICES Appendix A Service constraints Appendix B Summary of legislation and policy relating to contaminated land Appendix C Site Photographs Appendix D Risk assessment methodology Appendix E Desk study information GE Aviation Systems Limited ii Preliminary Risk Assessment: GE Aviation, Hamble-le-Rice 28854 R01 (00) 1 INTRODUCTION On the instruction of CgMs (part of the RPS Group) acting on behalf of GE Aviation Systems Limited (‘‘the client’’), RSK Environment Limited (RSK) has carried out a preliminary risk assessment (PRA) of the land at GE Aviation UK, Kings Avenue, Hamble-le-Rice, Southampton here after referred to as ‘the site’. The project was commissioned in order to obtain / collate information on the environmental characteristics of the site and assess potential liabilities associated with site ownership and redevelopment. This report is subject to the RSK service constraints given in Appendix A. 1.1 Scope The project was carried out to an agreed brief as set out in RSK’s proposal (ref: 28854L01 dated 19th September 2017). The scope of works for the Preliminary Risk Assessment included: Review of the published geological, hydrogeological and hydrological data; Review of historical plans to ascertain previous land use and identify potential historical sources of contamination; Review of a environmental database (GroundSure report EMS-402045_537478,