Revision Schedule
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East Sussex County Council and Brighton and Hove City Council Wastewater Management Study Revision Schedule Wastewater Management Study October 2009 Rev Date Details Prepared by Reviewed by Approved by 01 06/09 v1 Mary Pyne/Sarah Kelly Clare Postlethwaite Damon O’Brien Assistant Consultant Consultant Technical Director 02 07/09 v2 Clare Postlethwaite Carl Pelling Damon O’Brien Consultant Principal Consultant Technical Director 03 10/09 Final Clare Postlethwaite Carl Pelling Damon O’Brien Consultant Principal Consultant Technical Director Scott Wilson Scott House Alençon Link This document has been prepared in accordance with the scope of Scott Wilson's appointment with its client and is subject to the terms of that appointment. It is addressed Basingstoke to and for the sole and confidential use and reliance of Scott Wilson's client. 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Fax 01256 310 201 © Scott Wilson Ltd 2009 www.scottwilson.com East Sussex County Council and Brighton and Hove City Council Wastewater Management Study Table of Contents 1 Introduction ....................................................................................... 1 Study Area...................................................................................................................... 1 Objectives....................................................................................................................... 1 Legislative Context ......................................................................................................... 2 Growth in East Sussex and Brighton & Hove.................................................................. 5 2 Stage 1 – Baseline Assessment and Issue Identification...................9 Sludge Treatment Capacity ............................................................................................9 WwTW Consent Capacity............................................................................................. 11 Wastewater Treatment Works Process Capacity .......................................................... 16 Environmental Capacity of Receiving Watercourses..................................................... 19 3 Stage 2 Significance of Issues ........................................................ 27 Sludge treatment capacity ............................................................................................ 27 WwTW capacity............................................................................................................ 27 4 Hailsham North and South WwTW .................................................. 36 Significance of Issues Assessment............................................................................... 36 5 Stage 3 - Option Assessment.......................................................... 38 WwTW Option Identification.......................................................................................... 38 WwTW Option Assessment .......................................................................................... 40 Sewage sludge............................................................................................................. 45 6 Preferred Spatial Strategy ............................................................... 49 7 References...................................................................................... 50 8 Appendix A – Statutory Standards................................................... 51 Bathing Water Standards.............................................................................................. 51 9 Appendix B – SWS information ....................................................... 54 SWS Sludge Treatment Position Statement.................................................................. 54 PR09 and NEP Schemes.............................................................................................. 56 10 Appendix C – Wastewater Calculations........................................... 58 11 Appendix D – Environmental Capacity Data.................................... 67 12 Appendix E – Figures ...................................................................... 72 Figure 1 – Study Area................................................................................................... 72 East Sussex County Council and Brighton and Hove City Council Wastewater Management Study Figure 2 – WwTW DWF locations ................................................................................. 73 Figure 3 – Current WwTW Volumetric Capacity_HR..................................................... 74 Figure 4 - Current WwTW Volumetric Capacity............................................................. 75 Figure 5 – Future WwTW Volumetric Capacity ............................................................. 76 Figure 6 – Future WwTW Dwelling Capacity................................................................. 77 Figure 7 – Bathing Waters ............................................................................................ 78 Figure 8 – Sites of Conservation Interest ...................................................................... 79 Figure 9 – Hailsham Potential Preferred Spatial Options .............................................. 80 13 Appendix F - Sustainability Appraisal of Options ............................. 81 1 Introduction 1.1 East Sussex County Council (ESCC) and Brighton & Hove City Council (BHCC) are undertaking a joint Waste and Minerals Core Strategy Development Plan Document (WMCS) which will undergo public examination by independent inspection to judge ‘soundness’ of the evidence. As part of this process, a Wastewater Management Study is required to support the evidence base, providing information relating to the management of wastewater and sewage sludge in the ESCC and BHCC areas. Study Area 1.2 The study area covers the county of East Sussex and the city of Brighton and Hove. East Sussex contains the Boroughs of Eastbourne and Hastings and the Districts of Lewes, Rother, Wealden. Figure 1 shows the study area and the council boundaries within. 1.3 The Regional Spatial Strategy has set out the required number of new houses to be built in East Sussex and Brighton and Hove up to 2026. Each of the councils within the study area is at a different stage in the development of their Local Development Framework but housing figures have been adopted at the District level. Subsequently, current and future capacity in terms of wastewater treatment and disposal has been assessed using estimated growth figures provided by Southern Water Services (SWS). 1.4 SWS is the sewerage undertaker for the East Sussex region, and has been an active consultee in this project, while also providing information regarding sewage and sludge treatment. Objectives 1.5 It is intended that this report and the outcomes of this study be a ‘Living Document’, to be updated and amended as and when new data, such as housing figures, or new policies and guidance are published and become available. It should be noted that this report provides a picture of the current situation with regards to wastewater treatment capacity and it is likely that the conclusions could become obsolete if not regularly updated. 1.6 In accordance with the tender brief, the objectives of this project are to: • assess the baseline capacity of wastewater and sludge management capacity within the East Sussex and Brighton and Hove areas; • determine any issues with the available capacity relating to future housing and employment growth within the area; • determine whether these issues are significant enough to require a separate issues assessment encompassing the development of ‘options’ for addressing the issue; • for significant issues, identify reasonable options for sludge and wastewater treatment capacity expansion; • test the identified available options to identify the most suitable option(s); and Wastewater Management Study October 2009 1 • produce a preferred Spatial Strategy for future sludge and wastewater management. 1.7 The preferred Spatial Strategy will not identify individual sites; rather this will be covered by the upcoming Waste and Minerals Development Plan Document (DPD), which will provide further details of potential site allocation for waste sites. Work is due to commence on the Waste DPD in 2010, with the content guided by the Core Strategy. Legislative Context Water Framework Directive 1.8 The Water Framework Directive (WFD) (2000/60/EC) was passed into UK law in 2003. The competent authority responsible for its implementation is the Environment Agency in England and Wales. The overall requirement of the directive is that all water bodies in the UK must achieve good ecological, chemical status and morphological status by 2015 unless there are grounds for derogation. 1.9 The WFD will for the first time combine water quantity and water quality issues together. The directive combines previous water legislation and in certain areas strengthens existing