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Desk Study Report Land Off Barby Road Kilsby

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Desk Study Report Land Off Barby Road Kilsby DESK STUDY REPORT LAND OFF BARBY ROAD KILSBY Prepared for: Richborough Estates ASL Report No. 132-14-087-11r1 October 2014 ASL Holly Farm Business Park Honiley Warwickshire CV8 1NP T: +44(0)1926485508 F: +44(0)1926485507 E: [email protected] W: www.aslenvironmental.co.uk DESK STUDY REPORT LAND OFF BARBY ROAD KILSBY CONTENTS 1.0 INTRODUCTION .......................................................................................... 3 2.0 THE SITE .................................................................................................... 4 3.0 GEOLOGY .................................................................................................... 5 4.0 HYDROLOGY ............................................................................................... 5 5.0 HYDROGEOLOGY ........................................................................................ 6 6.0 SITE HISTORY ............................................................................................ 7 7.0 STATUTORY DATABASE SEARCH ................................................................. 8 7.1 General ................................................................................................... 8 7.2 Database Search Results ............................................................................ 8 7.3 Environment Agency Search Results ............................................................ 8 7.4 Geological Hazards .................................................................................... 9 7.5 Contemporary Trade References ................................................................. 9 8.0 ASSESSMENT OF CONTAMINATION RISK ................................................. 10 8.1 General ................................................................................................. 10 8.2 On-Site Sources of Contamination ............................................................. 10 8.3 Off-Site Sources of Contamination ............................................................. 10 8.4 Receptors and Pathways .......................................................................... 10 8.5 Potential Pollutant Linkages and Qualitative Risk Assessment ........................ 11 9.0 GEOTECHNICAL CONSIDERATIONS .......................................................... 13 10.0 FURTHER WORK ....................................................................................... 14 11.0 SUMMARY AND RECOMMENDATIONS ....................................................... 15 REFERENCES ...................................................................................................... 16 GENERAL NOTES ................................................................................................. 17 TABLES 1 Summary of Site History FIGURES 1 Site Location 2 Site Layout 3 Conceptual Site Model APPENDICES I Environmental Database Search II Historical Map Extracts ASL Report No. 132-14-087-11r1 Page No. 2 of 17 October 2014 DESK STUDY REPORT LAND OFF BARBY ROAD KILSBY 1.0 INTRODUCTION In June 2014, ASL was instructed by Richborough Estates to undertake a desk study of the site known as Land off Barby Road, Kilsby. The instruction to proceed with these works was received by email from Richborough Estates dated 25th June 2014. The purpose of this desk study is to determine any potential environmental and geotechnical risk issues and liabilities pertaining to the future development of the site. It is understood that the proposed development is likely to comprise the construction of residential dwellings with associated areas of hardstanding for access and parking and soft landscaping for gardens and areas of public open space and drainage infrastructure. A proposed development layout is not currently available for the site. This assessment uses available information on the site and the surrounding area sourced from environmental databases maintained by the Environment Agency (EA), historical ordnance survey maps, a site walkover survey, a review of the site’s environmental setting and an appraisal of the current and former land uses with a view to determining the potential for contamination to be present at the site. This report presents the findings of this assessment together with the factual data sourced during the course of these works which are appended for completeness. It should be noted that this assessment cannot determine the actual levels of contamination present at the site only the potential for contamination to be present. The general notes section should be consulted in relation to the limitations of this report. This report has been prepared for the sole benefit of the Client, Richborough Estates and their representatives and agents. The report has been written based on the results of data searches and site conditions encountered at the time of the assessment. Future changes in legislation and advances in current best practises or provision of more detailed design proposals will result in this report requiring review and possible further assessment after the date of issue. The general notes section within this report should be noted in relation to the limitations of this assessment. ASL Report No. 132-14-087-11r1 Page No. 3 of 17 October 2014 2.0 THE SITE The site is located to the immediate north and south of Barby Road, in the east of Kilsby located approximately 7km south-east of Rugby town centre. The site can be located approximately by National Grid Reference SP 558 708 as shown on Figure 1. The entire site comprises an irregularly shaped piece of land with long axis aligned approximately north to south with maximum dimensions of 380m long and 165m wide. The site is separated into two areas by Barby Road running east to west in the northern third of the site. The first area covers approximately 1.0 hectares and occupies the north of the site. This part of the site comprises an irregularly shaped piece of land with the long axis aligned approximately north-east to south west and maximum dimensions of 150m long and 120m wide. The area is located topographically higher in the south-east and generally slopes down to the north-west with a maximum change in level of approximately 2m. During the site walkover this part of the site comprised undeveloped open space that was generally overgrown with scrub vegetation. Access to the northern part of the site is via a gateway located in the south west off Barby Road that has been secured with a post centrally. Hedgerows form the boundaries to the northern part of the site in the north, west and south with a wooden fence forming the eastern boundary. A metal barrier, approximately 30 metres in length, forms part of the boundary to the west. The site is bound by to the north and west by residential properties, to the east by agricultural land and to the south by Barby Road with the remainder of the site beyond. The second area covers approximately 2.0 hectares and occupies the central and southern part of the site to the south of Barby Road. This part of the site comprises an irregularly shaped piece of land with the long axis aligned approximately north to south and maximum dimensions of 240m long and 165m wide. This area is located topographically higher in the east and generally slopes down to the west with a maximum change in level of approximately 6m. During the site walk over this part of the site comprised rough pasture land used to graze sheep. A drainage ditch is located along the western boundary of this part of the site that is overgrown with vegetation. During the site walkover, this surface water feature was noted to be dry. Access to the southern plot is via a gated entrance in the north-east corner of the site off Barby Road. Hedgerows form the site boundaries on all sides of this part of the site with mature trees present along the southern boundary. The site is bound to the east by residential dwellings, to the south by the M45 roadway with agricultural land beyond, to the west by agricultural land and to the north by Barby Road with the remainder of the site beyond. The general site layout is presented in Figure 2. ASL Report No. 132-14-087-11r1 Page No. 4 of 17 October 2014 3.0 GEOLOGY The British Geological Survey (BGS) Sheet No. 185 – Northampton Solid and Drift indicates the eastern boundary of the site to be directly underlain by drift geology comprising Boulder Clay. The Boulder Clay is not described by the BGS in the vicinity of the site. The thickness of the Boulder Clay is not defined by the BGS in the vicinity of the site however it is expected that this stratum will be of limited thickness. The majority of the site and the Boulder Clay is indicated to be directly underlain by solid geology comprising Lower Lias generally described as ‘mainly mudstone, with a few thin limestones’ by the BGS. This stratum is indicated to be between 140 and 170m thick in the vicinity of the site. Solid geology comprising Middle Lias, that overlies the Lower Lias, is indicated to be present at the surface in the south of the site generally described as ‘silts, mudstones and thin silty limestones’ by the BGS. The Middle Lias is indicated to less than 5m thick at the site. Drift geology comprising Alluvium is indicated to be present at the surface directly to the west of the site centrally. The Alluvium is not described by the BGS in the vicinity of the site. The thickness of this stratum is not defined by the BGS in the vicinity of the site, however it is expected that his stratum will be of limited thickness. In addition to the published
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