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Engineer/ Manage/ Deliver/ Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 Issuing Office Hallamshire House Meadow Court Hayland Street Sheffield S9 1BY Telephone: 01142 440077 Email: [email protected] Website: www.alanwood.co.uk REMEDIATION STRATEGY - RESIDENTIAL DEVELOPMENT PHASE 2 ON LAND OFF BEVERLEY ROAD, WILLERBY for BEAL DEVELOPMENTS LIMITED Project Reference: SLR/AC/40714-Rp004 Prepared by: A. Clark BSc (Hons) MSc FGS Signed: Date: 7th January 2021 Approved by: S. L Roberts, BEng (Hons) MSc CEnv MICE Signed: Date: 7th January 2021 Issue Revision Revised by Approved by Revised Date For the avoidance of doubt, the parties confirm that these conditions of engagement shall not and the parties do not intend that these conditions of engagement shall confer on any party any rights to enforce any term of this Agreement pursuant of the Contracts (Rights of third Parties) Act 1999. The Appointment of Alan Wood & Partners shall be governed by and construed in all respects in accordance with the laws of England & Wales and each party submits to the exclusive jurisdiction of the Courts of England & Wales Report Prepared for Beal Homes 1 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 CONTENTS 1 INTRODUCTION ................................................................................................. 4 1.1 Appointment ........................................................................................... 4 1.2 Objectives ............................................................................................... 4 2 SITE DETAILS AND DESCRIPTION .................................................................. 6 2.1 Site Location ........................................................................................... 6 2.2 Site History ............................................................................................. 6 3 GROUND CONDITIONS ..................................................................................... 7 3.2 Visual & Olfactory Evidence of Contamination ....................................... 7 4 IDENTIFIED CONTAMINATION ISSUES ........................................................... 8 4.1 Introduction ............................................................................................. 8 5 RISK ASSESSMENT .......................................................................................... 9 5.1 Introduction ............................................................................................. 9 5.2 Assessment Framework ......................................................................... 9 5.3 Summary of Identified Contaminant Linkages ...................................... 10 6 CONTAMINATION REMEDIATION OPTIONS ................................................. 12 6.1 Protection of Human Health in the Post-Development Case ................ 12 6.2 Options Appraisal ................................................................................. 12 6.3 Remediation Objectives ........................................................................ 12 6.4 Feasible Remediation Options ............................................................. 13 7 REMEDIATION STRATEGY ............................................................................. 16 7.1 Scope of Works – Removal and Re-use ............................................... 16 7.2 Scope of Works – Engineered Capping ................................................ 18 8 GENERAL CONSIDERATIONS ....................................................................... 20 8.1 Site Safety ............................................................................................ 20 8.2 Hazards Posed by the Principal Contaminants .................................... 20 8.3 Health and Safety ................................................................................. 21 8.4 Unsuitable Materials ............................................................................. 21 9 REGULATORY APPROVAL ............................................................................ 22 10 REFERENCES .................................................................................................. 23 TABLES Table 5.1 - Summary of Revised Conceptual Site Model & Risk Assessment.... 11 Table 6.1 - Remediation Objectives .................................................................... 13 Table 6.2 - Summary of Potential Remediation Technologies ............................ 13 Table 6.3 - Soil Remediation Technologies Options Assessment ...................... 14 Report Prepared for Beal Homes 2 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 FIGURES 40714 / 001 SITE LOCATION PLAN 41278 / 002 EXPLORATORY HOLE LOCATION PLAN APPENDICES APPENDIX A: ALAN WOOD AND PARTNERS, PHASE I/II GEO-ENVIRONMENTAL INVESTIGATION REPORT, JS/ST/41278-RP001, AUGUST 2018 APPENDIX B: AWP GENERIC ASSESSMENT CRITERIA V8 Report Prepared for Beal Homes 3 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 1 INTRODUCTION 1.1 Appointment 1.1.1 Alan Wood & Partners (AWP) was appointed by Beal Homes (the 'Client') to provide technical services associated with the remediation of the proposed residential development of land off Beverley Road Willerby. 1.1.2 This remediation strategy should be read in conjunction with the following documentation: • Alan Wood and Partners, Phase I/II Geo-Environmental Investigation Report, doc ref. JS/ST/41278-Rp001, dated August 2018; • Alan Wood and Partners, Hydrogeological Risk Assessment Report, doc ref. JMS/SLR/41278-Rp002 Rev A, dated August 2018; • Alan Wood and Partners, Ground Gas Risk Assessment, doc ref. JS/BD/41278-Lt002, dated October 2018. • Alan Wood and Partners, Construction Environment Management Plan, doc ref. SLR/AC/40714-Rp003, dated December 2020. 1.1.3 This report has been prepared for the sole use and reliance of Beal Homes. 1.1.4 No other third party may rely on, reproduce or redistribute any content of this report without the prior written consent of Alan Wood and Partners. Any unauthorised third parties using the information presented in this report do so entirely at their own risk and are duly excluded from any warranty, duty of care or skill. 1.2 Objectives 1.2.1 The proposed development comprises of 141 residential dwellings and is being developed with consent from East Riding of Yorkshire Council. 1.2.2 Near surface made ground has been found to contain contaminants above residential GACs. Elevated lead has been recorded at a single location (TP15) and elevated PAH in three locations (TP06, TP15 and BH06). The recorded concentrations may present a potential risk to end users if present within surface soils of the finished development. As such remediation has been recommended to minimise potential risks to human health during normal site occupancy and use following redevelopment. Report Prepared for Beal Homes 4 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 1.2.3 This report presents the evaluation and identification of environmental remediation options for the site. Specifically, the report presents: • A summary of the site setting; • Definition of remediation objectives; • The identification of contamination remediation options; • Recommended environmental remediation strategy with proposals for validation and • Specification for localised earthworks to mitigate unsuitable shallow made ground. Report Prepared for Beal Homes 5 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 2 SITE DETAILS AND DESCRIPTION 2.1 Site Location 2.1.1 The site is located to the north-west of Hull, approximately 8km from the city centre and is centred at approximate National Grid Reference (NGR) 501769mE 430501mN. The site has an overall area of approximately 3.72 hectares, with the site location shown on Figure 40714/001. 2.1.2 The site is roughly rectangular in shape and comprises a number of differing land uses including soft landscaping, existing residential property, and a number of outbuildings. The site slopes steadily from the south to the north, at a similar level to the surrounding land. Access to the site is currently off Great Gutter Lane West to the north. 2.2 Site History 2.2.1 A full record of the historical period reviewed is presented in the combined Phase I/II report carried out by Alan Wood and Partners. A summary of significant findings is presented below. 2.2.2 The earliest available Ordnance Survey historical maps, dated c.1855 show the site to have been situated in an area of undeveloped agricultural land. The site was developed as residential properties c. 1961. 2.2.3 Anecdotal evidence indicates that the site has historically been used as pastoral farmland. 2.2.4 The adjacent land surrounding the site has been predominantly developed as residential properties. A shopping park was constructed to the north of the site (250m) c. 1994. Report Prepared for Beal Homes 6 Remediation Strategy Address: Proposed Residential Development Phase 2 on Land off Beverley Road, Willerby Project Number: SLR/AC/40714-Rp004 3 GROUND CONDITIONS 3.1.1