STAGE 1: DESKTOP STUDY and PRELIMINARY RISK ASSESSMENT REPORT for BARCLAY BEALES LTD, BEESTON ROAD, MILEHAM, KING’S LYNN, PE32 2RS for Barclay Beales Ltd
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STAGE 1: DESKTOP STUDY AND PRELIMINARY RISK ASSESSMENT REPORT FOR BARCLAY BEALES LTD, BEESTON ROAD, MILEHAM, KING’S LYNN, PE32 2RS For Barclay Beales Ltd Your Environment Head Office, Chilgrove Business Centre, Chilgrove Park Road, Chilgrove, Nr Chichester, PO18 9HU Tel: 01243 787150 Report Number: YE3134 Date: June 2017 Kevin Brown [email protected] Stage 1: Desktop Study and Preliminary Risk Assessment Barclay Beales Ltd, Beeston Road, King’s Lynn, PE32 2RS YE3134, June 2017 Name Position Signature Date Prepared Kevin Brown Geo- June 2017 by: Environmental Engineer Reviewed Tristan Junior Geo- June 2017 by: Le Butt Environmental Engineer Colin Approved: Director June 2017 Hiscock For and on behalf of YourEnvironment Issue Date Description Prepared Reviewed Approved 00 06.06.2017 Final Report KB TLB CH i | P a g e Stage 1: Desktop Study and Preliminary Risk Assessment Barclay Beales Ltd, Beeston Road, King’s Lynn, PE32 2RS YE3134, June 2017 Contents 1.0 Introduction .................................................................................... 1 2.0 Site Location ................................................................................... 1 3.0 Site Geology & Geological Hazards ......................................................... 2 4.0 Site Hydrogeology and Hydrology .......................................................... 3 5.0 Site Flood Information ........................................................................ 4 6.0 Site Environmental and Industrial Setting ................................................ 4 7.0 Historical Study ................................................................................ 7 8.0 Walkover Survey ............................................................................... 8 9.0 Summary of Potential Contaminant Sources ............................................10 10.0 Framework for Assessment of Contamination ..........................................10 11.0 Source / Pathway / Receptor ...............................................................11 12.0 Preliminary Conceptual Site Model and Qualitative Risk Assessment ..............12 13.0 Proposed Site Investigation .................................................................15 14.0 Recommendations ............................................................................15 15.0 Limitations and Uncertainties..............................................................15 Appendices Appendix A – Site Location and Proposed Layout Plan Appendix B – EnviroInsight and GeoInsight Appendix C – Historical Ordnance Survey Maps Appendix D – Site Walkover Photographs ii | P a g e Stage 1: Desktop Study and Preliminary Risk Assessment Barclay Beales Ltd, Beeston Road, King’s Lynn, PE32 2RS YE3134, June 2017 1.0 Introduction YourEnvironment (YE) was instructed by Barclay Beales Ltd (Quote No: Q2763, Dated: May 12th 2017) to produce a Stage 1: Desktop Study and Preliminary Risk Assessment Report for a site at Beeston Road, Mileham, King’s Lynn in Norfolk. We understand current plans for the redevelopment of the site include: ➢ Construction of a commercial unit for the extension of an existing vehicle spray painting and MOT garage business. This desk study has been prepared for pre-planning purposes to investigate the potential geo-environmental issues that may be associated with the development of the site. A site location and proposed playout plan for the site, at the time of issuing this report, can be viewed within Appendix A. Objectives The objectives of this Stage 1 report are to: ➢ Establish the environmental setting, including sensitivity in relation to human health, surface water, groundwater and ecological receptors; ➢ Review historical and recent uses to assess the potential for contamination to be present from past and current land-use; ➢ Assess by qualitative means the potential nature and extent of contamination from those uses and the environmental risk and liabilities which may affect the site redevelopment; ➢ Identify the prevalent source-pathway-receptor linkages present on site by means of a Tier 1 contamination risk assessment which incorporates the formulation of a Conceptual Site Model. Information Sources During the production of this report the following information sources have been utilised: ➢ Historical Ordnance Survey Maps, EnviroInsight and GeoInsight information obtained from Groundsure (4C Group Ltd). ➢ British Geological Survey Geology of Britain Viewer: (http://mapapps.bgs.ac.uk/geologyofbritain/home.html; accessed May 2017) ➢ Environment Agency ‘What’s in Your Backyard?’ website (http://maps.environment- agency.gov.uk/; accessed May 2017). 2.0 Site Location The following table outlines the details of the site: Site address Beeston Road, Mileham, Kings Lynn, PE32 2RS Grid reference 590783, 317572 Total area 0.81 ha Topography The site is situated at approximately 55mAOD. The site slopes gently from east to west with local undulations throughout. 1 | P a g e Stage 1: Desktop Study and Preliminary Risk Assessment Barclay Beales Ltd, Beeston Road, King’s Lynn, PE32 2RS YE3134, June 2017 Site Layout The site is accessible from Beeston Road via two vehicular entrances. The site contains a number of buildings currently used as a commercial vehicle paint works and a motor vehicle testing station. These buildings are constructed of metal sheeting with concrete bases. The remainder of the site is mainly concrete and hardstanding with some local vegetated areas including trees along the boundaries. The adjacent land is agricultural. Table 1: Site Details 3.0 Site Geology & Geological Hazards Superficial Ground and Drift Deposits The superficial ground or drift deposits recorded on site comprise Lowestoft Formation Diamicton (chalky till, together with outwash sands and gravels, silts and clays). Undifferentiated River Terrace Deposits are present immediately to the west of the site. Bedrock Geology Underlying the superficial drift deposits is bedrock geology formed of Cretaceous age chalk from the Lewes Nodular Chalk Formation, Seaford Chalk Formation, Newhaven Chalk Formation and Culver Chalk Formations (undifferentiated). Artificial/Made Ground There are no records of artificial/ Made Ground on the site. Natural Hazards On site there is negligible risk from compressible deposits, very low risk from landslides, collapsible deposits, and running sand, and negligible to low risk from ground dissolution and shrink swell clay. Coal Mining There are no coal mining areas identified within 1000m of the site. Non-Coal Mining There is one record of non-coal mining at the site. The GroundSure report notes that ‘Sporadic underground mining of restricted extent may have occurred. Potential for difficult ground conditions are unlikely and localised and are at a level where they need not be considered’. The commodity mined was chalk. Three similar non-coal mining records are identified within 1000m of the site; these are to the west and north-west and are 713m to 990m from the site boundary. The commodity mined in each case was chalk. Faults The 1:10,000 scale geological map for the area does not identify any faults within 500m of the site. Radon The study site is not located within a Radon Affected Area, as less than 1% of properties are above the Action Level. The Groundsure report indicates that no radon protection measures are necessary. Borehole Records There are no borehole records identified within 250m of the site. 2 | P a g e Stage 1: Desktop Study and Preliminary Risk Assessment Barclay Beales Ltd, Beeston Road, King’s Lynn, PE32 2RS YE3134, June 2017 4.0 Site Hydrogeology and Hydrology Aquifer within Superficial Geology The aquifer within the superficial geology underlying the site (Lowestoft Formation Diamicton) is designated Secondary (undifferentiated). This classification is assigned where it is not possible to attribute either category A or B to a rock type. In general, these layers have previously been designated as both Minor and Non-Aquifer in different locations due to the variable characteristics of the rock type. Immediately to the west of the site, the aquifer associated with the River Terrace Deposits is designated Secondary A, described as ‘permeable layers capable of supporting water supplies at a local rather than strategic scale, and in some cases forming an important source of base flow to rivers. These are generally aquifers formerly classified as Minor Aquifers. Permeability of Superficial Geology The minimum permeability of the Diamicton is reported to be low and the maximum permeability is reported to be moderate. The flow type is mixed. Immediately to the west of the site, the minimum permeability of the River Terrace Deposits is reported to be high and the maximum permeability is reported to be very high. The flow type is intergranular. Aquifer within Bedrock Geology The aquifer within the bedrock geology is designated Principal. This classification is assigned to aquifers with geology of high intergranular and/or fracture permeability, usually providing a high level of water storage and may support water supply/river base flow on a strategic scale. Generally Principal Aquifers were previously Major Aquifers. Permeability of Bedrock Geology The permeability of the bedrock is recorded as very high with the flow type reported to be fracture. Groundwater Abstraction Licences There are fourteen groundwater abstraction licences located within 2000m of the site. Twelve of these are classified as historical. The nearest active license is located 531m south