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Churchill Retirement Living Limited Land at the Pippin

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Churchill Retirement Living Limited Land at the Pippin CHURCHILL RETIREMENT LIVING LIMITED LAND AT THE PIPPIN, CALNE, SN11 8JQ SITE INVESTIGATION REPORT The Granary White Hall Farm Long Itchington Warwickshire CV47 9PU November 2017 Tel: 01926 815678 Report No. CCL03036.CF46 Fax: 01926 815222 [email protected] www.crossfield-consulting.co.uk CONTENTS 1. INTRODUCTION 2. THE SITE 3. PUBLISHED GEOLOGY 4. DESK STUDY ENQUIRIES 5. GROUND CONDITIONS AND GEOLOGICAL MODEL 6. PROPOSED DEVELOPMENT 7. ASSESSMENT OF POTENTIAL CONTAMINATION AND GROUND GASES 8. ASSESSMENT OF MINING, QUARRYING AND OVERALL GROUND STABILITY 9. FOUNDATION RECOMMENDATIONS 10. TEMPORARY WORKS 11. ASSESSMENT OF SOAKAWAY DRAINAGE 12. ROAD PAVEMENTS 13. ASSESSMENT OF MATERIALS FOR WASTE DISPOSAL 14. RECOMMENDED SUPERVISION AND MONITORING 15. SUMMARY REFERENCES GENERAL NOTES TABLE 1 - Conceptual Site Model TABLE 2 - Summary of Analytical Test Data: Soils – Potential Risks to Human Health TABLE 3 - Assessment of Pollutant Linkages FIGURE 1 - Site Location Plan FIGURE 2 - Site Plan FIGURE 3 - Proposed Development Plan APPENDIX I - Extracts of Historical Maps APPENDIX II - Desk Study Information APPENDIX III - Previous Ground Investigation APPENDIX IV - Ground Investigation APPENDIX V - Quantitative Risk Assessment: Human Health APPENDIX VI - Basis of Geotechnical Assessment for foundations The Pippin, Calne CCL03036.CF46 November 2017 1. INTRODUCTION Churchill Retirement Living Limited proposes to redevelop the area of an existing shop and associated car parking areas at 83 The Pippin, Calne, with a block of residential apartments. Occupants of the apartments will be of retirement age. At the time of the ground investigation works, the site was occupied by a working shop and surrounding car parking areas. The proposed development comprises a three- to four- storey split level residential building, for approximately 35 apartments, together with associated car parking and soft landscaped areas. Crossfield Consulting Limited has been commissioned to undertake an investigation of the site to identify potential constraints to redevelopment relating to the ground conditions and including a risk-based environmental assessment and recommendations for remediation works, foundations, road pavement design and general construction advice in the context of the above development proposals. The investigation follows a preliminary site investigation and Tier 1 contamination appraisal report by ACS Testing Limited (dated September 2015) and relevant records from these works are included in this report. This report presents the information obtained from a desk study and ground investigation. Sections 2 to 5 of the report, together with the associated Figures and Appendices, provides a Ground Investigation Report (GIR), as defined in BS EN 1997-1:2004 and BS EN 1997-2:2007. A risk-based assessment of potential contamination is included in Section 7 of the report. This assessment makes reference to the desk study, ground investigation information and a Conceptual Site Model. It is considered that the report complies with National Planning Policy Framework and is in general accordance with guidance published by the Environment Agency and the NHBC. The report also includes information required to form a Geotechnical Design Report as defined in BS EN 1997- 1:2004, and the salient information, assessments and recommendations are presented in Sections 9 to 16 of the report, together with the associated Figures and Appendices. It is considered that the report is suitable for submission in support of a planning application and the report is appropriate to assist in an appraisal of development solutions and costs, together with the preparation of engineering designs for the development. The report also complies with the published guidance relating to the requirements of a Building Control authority. 2. THE SITE 2.1 Location The site is located at an area south west of The Pippin, approximately 60 m northwest of River Marden, as shown on Figure 1. The National Grid Reference for the site is ST 99816 71140. The site is within a retail area, with several shops and associated car parking spaces located to the west of the site. To the east, the site is bordered by The Pippin, which has a small access road running along the northern boundary of the site, to surrounding car parking areas. To the south of the site is further car parking areas, separated by a boundary of trees and vegetation. The Pippin, Calne Page 1 CCL03036.CF46 November 2017 2.2 Site Description This site description is based on observations made during a ground investigation on 7th November 2017. The site comprises an irregular plot of land with an area of approximately 0.3 ha. The site comprises approximately four rectangular plots of land running east-west, which are set at different levels, separated by retaining walls. The site and the general surrounding area decreases in elevation from approximately 73.5 m in the northern area, to approximately 71.5 m in the south western area. At the time of the site inspection, a hardware shop was present in the northern area of the site. The property includes a small tarmac surfaced area with posts and an adjacent brick wall at the shop entrance. There are some “lock-up” garages adjoining the shop to the south of this wall, at a lower level of approximately 1 m. An outbuilding is present approximately 30m west of the garages. An unused fuel pump (likely to be associated with past sales of paraffin) is located within a recess in the northern elevation of the building. It is noted that the pump appears to be a 1960s design and is noted to have been out of use for many years. On the basis of the visual inspection, it appears likely that a small underground tank is located below the pump (although this remains to be confirmed). The shop is surrounded by car parking areas and an access road to the north. To the south of the garages, a retaining brick wall is present, beyond which the ground level decreases approximately 0.5 m. This plot comprises further car parking areas, surrounded a grassy area to the west and by bordered by hedges to the south. The grassy area is a public open area with a small path and some vegetation. A brick retaining wall separates the southern area of the site, with a further decrease in elevation, approximately 0.5m. To the south of the wall is a small area of rough concrete, surrounded by grassy areas and a foot path. Numerous mature trees and hedges are present at the southern site boundary. Beyond this site boundary, there are further car parking areas with small soft landscaped areas. 2.3 Site History The site history has been researched with reference to old editions of the County Series and National Grid Ordnance Survey Plans obtained from Emapsite. Extracts from a selection of these plans are presented in Appendix I. The plans indicate the following development has taken place on and around the site. The 1886 County Series plan shows a number of small buildings (sheds) on the site, with most of the site occupied by garden areas. To the north of the site was the Zion Chapel with burial grounds. These burial grounds may extend into the northern margin of the site. The surrounding areas to the west and south of the site are mainly residential with a ‘Police station’ and probably some shops along High Street, to the west. To the east, beyond a road, which runs north to south along the eastern site boundary, there is an open area of public green land with footpaths. The 1900 plan shows no change in the buildings. There is a water pump indicated on the eastern area of the site. It is possible that the pump is associated with a well or cistern. By this date, a large Bacon/ Meat factory is located to the south of the site. The 1924 plan shows a new building developed adjacent to a previous building on site. A smaller previous building appears to have been demolished. The land to the east of the site is identified as ‘allotments’. A ‘Bank’ is denoted within the buildings to the west of the site. The 1936 and 1956 plan shows no change in buildings and surrounding areas. The Pippin, Calne Page 2 CCL03036.CF46 November 2017 The 1968-1970 plans show the development of new buildings in the eastern area of the site including the building now used as a shop. A row of six small domestic/ lock-up garages are now present in the south eastern area of the site. An access road is located in the centre of the site. There is a slaughter house present to the south east of the site, located directly on the previous road. The factory is now identified as a ‘Meat Products Factory’. The 1974-1978 plans shows two specified areas as ‘Yard’, located adjacent to the developed buildings. The eastern central area of the site appears to be a car parking area. An electricity substation is located north of the site. The previous allotment area to the east is now a large car park. The 1986-1988 plans shows no change to the buildings on site. The large meat products factory and slaughter house to the south are no longer recorded, and The Pippin has been realigned to its current route. The 1987-1992 plans show no further on site development. The previous factory site is now an undeveloped area. The 2002 plan shows no further development on site. The site remains unchanged on the 2010 map editions, although by this date, the supermarket to the east of the site had been constructed. 3. PUBLISHED GEOLOGY Geological map data published by the British Geological Survey (BGS) online and in print, on 1:50,000 scale of Marlborough (Sheet No.266) indicate that the site is underlain by solid strata of the Jurassic (Corallian Group) Stanford Formation (formerly classified as the Coral Rag).
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