Desk Study and Risk Assessment Former Reepham Station Land Reepham, Norfolk CANH0026 April 2018
Total Page:16
File Type:pdf, Size:1020Kb
Prepared by: Norfolk Partnership Laboratory, County Hall, Martineau Lane, Norwich, Norfolk, NR1 2SG Telephone (01603) 222416 Desk Study and Risk Assessment Former Reepham Station Land Reepham, Norfolk CANH0026 April 2018 Client: Canham Consulting The Old School School Lane Norwich Norfolk NR21 8EE i) Contents 1.0 Introduction 5 1.1 GENERAL 5 1.2 REPORT OBJECTIVES 5 1.3 SITE LOCATION 5 1.4 SITE LAYOUT 6 1.5 PLANNING APPLICATION 6 2.0 Desk Study 7 2.1 DESCRIPTION OF SITE AND SURROUNDINGS 7 2.2 DESK STUDY RESEARCHES UNDERTAKEN 17 2.3 PAST AND CURRENT ACTIVITIES AT THE SITE 18 2.4 INTENDED FUTURE USE OF THE SITE 20 2.5 PLANNING APPLICATIONS OR PERMISSIONS AT THE SITE 20 2.6 GEOLOGY 21 2.7 HYDROGEOLOGY AND HYDROLOGY 22 2.8 INFORMATION ON SITE DRAINAGE AND SERVICES 23 3.0 Identification of potential contaminants of concern and source areas 24 3.1 CONSULTATIONS WITH THE LOCAL AUTHORITY 24 3.2 CONSULTATIONS WITH THE ENVIRONMENT AGENCY 24 3.3 CONSULTATIONS WITH OTHER APPROPRIATE BODIES 24 3.4 REVIEW AND SUMMARY OF PREVIOUS REPORTS 24 4.0 Risk Assessment 25 4.1 CONCEPTUAL MODEL 25 4.2 SOURCES OF CONTAMINATION 25 4.3 POLLUTION LINKAGES 26 4.4 RECEPTORS 27 4.5 DESCRIPTION OF POSSIBLE POLLUTANT LINKAGES FOR CONTROLLED WATERS 31 4.7 DISCUSSION OF UNCERTAINTIES AND GAPS IN INFORMATION 31 5.0 Discussion of risks posed by the site 32 5.1 FORMER HISTORICAL LAND USE AS RAILWAY LAND. 32 5.2 GENERAL WASTE STORAGE AREA 32 5.3 GROUND GASES FROM POTENTIAL ON SITE MADE GROUND. 32 6.0 Conclusion 33 T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 2 of 34 Appendices Appendix A Site location plan Appendix B Geology report Appendix C Historical land use and historical maps Appendix D Full Envirocheck Report Appendix E Potential contaminative sources plan Appendix F Conceptual site model Appendix G Aerial Photographs 1946 & 1988 Appendix H Proposed Site Investigation Appendix I Proposed Site layout T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 3 of 34 ii) Distribution Canham Consulting 1 copy Norfolk Partnership Laboratory 1 copy T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 4 of 34 1.0 Introduction 1.1 General This Desk Study was carried out on land to the west of B1145 Station Road and to the north of the C265 Stony Lane in the market town of Reepham, Norfolk (OSGR 610065/323500). The area under consideration comprises former sidings, scrub and partially wooded land which was former railway land within Reepham Station. The development area does not include the existing Goods Shed or former Station building. This report by Norfolk Partnership Laboratory (NPL) was instigated at the request of Michelle Hughes of Canham Consulting after acceptance of NPL’s quotation. NPL provides a service within the Highways Group of the Community and Environmental Services Department of Norfolk County Council. This investigation fulfils the requirements for a desk study and walkover survey as specified in NHBC Standards, Chapter 4.1 Land Quality - managing ground conditions, January 2017. In addition a risk assessment has been carried out to the requirements of The Environmental Protection Act Part IIA. This report is inclusive of a full Envirocheck report, Envirocheck historical maps and historical land use. In addition consideration is given to the health and safety of construction workers and subsequent residents that may be affected due to any soil contamination of the site. The proposal is for mixed use development including retail, commercial, residential and a care village. Opinions and interpretations expressed herein are outside the scope of UKAS accreditation. Although every effort has been made to give a true assessment of the condition of the site within the constraints of the desk study, it is possible that different ground conditions or contamination may exist in parts of the site that is neither recorded nor visible. The risk of such occurrences should be further reduced by the main investigation if required. 1.2 Report objectives The objectives of these works are to assess contamination sources, pathways and receptors, and to determine whether any contamination may be present either within the site boundaries or just outside the site. The report also assesses the extent to which human health, buildings and services and controlled waters may be affected. If contamination is thought likely to be present, recommendations will be made to ascertain the level of contamination and if these levels are within allowable limits. 1.3 Site location The site is located in the market town of Reepham approximately 0.50 kilometre to the north of the town centre. (OSGR 610065/323500). Reepham is located approximately 20 kilometres to the north west of Norwich. T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 5 of 34 A site location plan is in Appendix A. 1.4 Site layout The site is irregular in shape wider on the eastern side and tapering to the west and approximately 2.27 hectares in area. A spot height of 46.0 metres is shown close to the south west corner of the site on the B1145. The southern part of the site is elevated above the northern section. The site falls by approximately 4.0 metres from the east to the west. 1.5 Planning application The site is subject to the planning conditions of Broadland District Council. T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 6 of 34 2.0 Desk Study 2.1 Description of site and surroundings A walkover survey was undertaken by Mr S. Berwick of NPL on 09 April 2018. The site is accessed via an asphalt carriageway from the B1145 through eastern boundary. The land to the east of the access road is elevated by approximately 2.0 metres and was very overgrown with shrubs and brambles. The road is approximately 100 metres in length and curves gently to the west leading to a much wider area of asphalt with the Station House to the north and former Goods Shed to the south. The Station House is now a café/restaurant and the former Goods Shed a retail outlet. This area is outside of the proposed development. Two smaller buildings also commercial/retail are present in this area as is a bunded heating oil tank. The hardstanding is approximately 70 metres in length and utilised for vehicle parking. To the west of the hardstanding an unmetalled overflow car park partially occupies the land which becomes moss covered with numerous bushes and trees. The remnants of a possible platform, some brick rubble and a general waste skip are located just to the west of the former Goods Shed. A number of fridges, paint tins and lubricant containers are also present close to the waste skip. Remnants of a small timber structure were also noted in this area. Wood, scaffolding and windows are stored to the rear of the former Goods Shed (southern side). A lorry trailer is located on the land further to the west, this was not accessed. An embankment approximately 1.50 metres in height but reducing to the west runs approximately two thirds the length of the site. Some of the former railway infrastructure remains such as concrete steps and a manhole. Overhead cables are also present in this area. It is assumed the step in the site levels was the difference in height from the sidings concourse to the track bed which would have once led to the Goods Shed. The development land to the south of the Goods Shed has recently been cleared of all scrub and falls slightly from east to west with mature trees and hedges to the southern boundary with C265 Stony Lane running parallel to the boundary. A collapsed building is present on the site close to the southern boundary at the approximate mid-point. An overhead electricity supply crosses the site from north to south. The Marriots Way located along the former mainline track bed runs parallel to the northern boundary. T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 7 of 34 Photograph 1: Site entrance looking to the south along the B1145. Photograph 2: Site entrance looking to the north along the B1145. T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 8 of 34 Photograph 3: Area of overgrown land in the north east portion of the site. Photograph 4: Site entrance. Photo taken from elevated west side of the site T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 9 of 34 Photograph 5: Elevated overgrown north east portion of the site to the east of access road. Photograph 6: Former Goods Shed to the left (south) and Station to the right (north). T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 10 of 34 Photograph 7: General waste skip with fridges, paint tins and lubricant containers Photograph 8: Derelict platform structure and brick rubble T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 11 of 34 Photograph 9: Overflow unmetalled parking area to the west of the hardstanding. Photograph 10: Lorry trailer container (not accessed) T:\HMLAB\PROJECTS\EXTERNAL\CANH0026 Reepham Station Desk Study\Reports\DS&RA Reepham Former Station Land.doc Page 12 of 34 Photograph 11: View to the western end of the site.