DOCSLIB.ORG

Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision Author Reviewed by Approved by Date approved Reason for revision C01 M McAree / John O’Connor Jon Neale 25/04/2019 Issue S.White HS2-HS2-CO-TEM-000-000046 P01 Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 Security classification: OFFICIAL Handling Instructions: none OFFICIAL Page ii Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 Contents 1 Non-Technical Summary 1 2 Technical Summary 2 2.2 Plant Overview 3 2.3 Slurry receipt 4 2.4 Slurry Treatment Plant process 5 2.5 STP design 5 2.6 Slurry makeup tanks 7 2.7 De-sanded slurry dehydration 7 2.8 Dirty water cleaning 9 2.9 Use of polymers 9 3 Application Forms 11 3.1 Form A 11 3.2 Form B2 11 3.3 Form B4 11 3.4 Form F1 11 4 Additional Information 12 4.1 Application Overview 12 4.2 EPR Application Form A 12 4.3 EPR Application Form B2 13 4.4 EPR Application Form B4 37 Appendix A – Letters of Authorisation 40 Appendix B – Figures 41 B.1 Figure 1 – Site Location Plan 41 B.2 Figure 2 – Permit Boundary 42 Appendix C - Site Layout 43 C.1 Bunding details 44 C.2 Figure 4 – Block flow diagram 1 45 C.3 Figure 5 – Block flow diagram 2 46 Appendix D – BAT Conclusions Applicability 47 Appendix E – CL:AIRE DoW CoP 53 E.1 Use of CL:AIRE at the Southern Portal 53 Figure E.1 – Materials management approach in Section C1 55 OFFICIAL Page i Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 Appendix F – Site Condition Report 56 F.1 Site Condition Report 56 Appendix G – CoTC Evidence 62 Appendix H – Proposed Polymer MSDS 63 List of figures Figure 1 : ALIGN EMS Document Hierarchy 14 List of tables Table 1: Summary of designated sites 17 Table 2: Summary of receptor sites 18 Table 3: Overall assessment of risk 19 Table 4: Assessment scores interpretation 19 Table 5: Overall assessment scores 20 Table 6: Waste operations which do not form part of an installation 37 Table 7: Types of waste accepted at the site 37 Table 8: Emissions 38 OFFICIAL Page ii Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 1 Non-Technical Summary 1.1.1 This permit application is made on behalf of the three organisations who make up the Align Joint Venture (Align JV) and relates to a non-hazardous waste treatment activity associated with the construction of Package C1 of the High Speed 2 (HS2) rail link. Package C1 encompasses 22 km of the route of HS2 through Buckinghamshire. The application is for a bespoke waste Environmental Permit for the physico-chemical treatment of non-hazardous waste for the purposes of recovery. The permitted area relates to land located at the southern portal (entrance) of the Chiltern Tunnel of HS2. 1.1.2 The only waste to be treated is chalk slurry (slurry) originating from the boring of the Chiltern Tunnel. The tunnel consists of 2 separate bored tunnels, one for each direction of travel. The tunnel is approximately 16km long and bored through chalk, with a number of different chalk strata being present along the length of the bore. The slurry treatment plant (STP) is located at the southern portal of the Chiltern Tunnel, where all arisings from boring operations are handled. Upon completion of the tunnelling works, the plant will be decommissioned, and the permit surrendered. It is currently envisioned that the plant operational lifespan will be approximately 4 years. 1.1.3 The Chiltern Tunnel is to be bored using two variable density tunnel boring machines (TBM), one per bore. This type of TBM has been specifically chosen for the geology to be encountered, taking into account the chalk strata, the location of the bore below the typical water table for large distances and the utilisation of the water table for public water supply, which means the bore crosses a number of source protection zones. A variable density TBM relies on the hydrostatic pressure behind the cutter face, produced by a slurry, to seal the bore during progress. The slurry in this case will be a mixture of water and chalk, which mixes with the cutter debris. This mixed slurry is pumped back to the southern portal via a hydraulic circuit where it is regenerated for reuse and the solid material removed. 1.1.4 The treatment process consists of a STP which treats the slurry to remove coarse and then fine particulate matter, following dosing with a suitable cfilter aid, resulting in a filter cake material. This is tested to confirm its suitability for recovery in the designated landscaping scheme under the CL:AIRE Definition of Waste: Code of Practice (DoW: CoP). The treated material will be reused to form the profile of landscaped areas sitting beneath topsoil and subsoil layers in accordance with the agreed project landscaping scheme. 1.1.5 Some produced filter cake material may be subject to chemical dosing with lime or cement in order to meet the moisture content requirements for the landscaping scheme. This dosing is likely to primarily be weather dependent. Other filter cake will be subject to treatment with cement powder, in order to provide the necessary cohesive strength to OFFICIAL Page 1 Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 construct haul and access roads for placement cells within the landscaping area. The majority of recovered material will not be chemically treated. 1.1.6 Liquid recovered from the filtration process, when lime is used as a filter aid, is primarily water with an elevated pH. It is recovered by reducing the pH through the additional of sulphuric acid. When polymer is used as a filter aid the filtrate is close to neutral pH. In both cases, the filtrate is used to produce regenerated slurry which is returned to the TBMs for reuse in the boring process. 1.1.7 The TBM’s will operate on a 24 hour per day basis, excluding maintenance periods. There will be a gap between the launch of the two TBM’s. However, although they operate continuously, boring operations are subject to a series of pauses during the day for the installation of support rings and lengthening of slurry pipes. 1.1.8 The hourly slurry plant input flow rate is up to 1,250m3/h (maximum 30,000m3 per day) per TBM. On average 2,650m3 of filter cake would be generated each day with peak of up to 6,000m3 with both TBMs working. In addition, there will be approximately 1,000m3 of coarse particulates separated from the slurry generated per day, which will also be used within the proposed landscaping scheme. 1.1.9 There are no direct emissions to air, land or sewer from the process. There is the potential for releases of water to surface water, via releases to the wider site surface water management system from the treated pH adjusted buffer tank, B6.3 Such releases are only anticipated in the event that the STP has a greater volume of water stored than is currently required by TBM operations. 1.1.10 The site wide water management system sits outside the permit boundary. For completeness, excess water will be transferred from tank B6.3 to a large attenuation pond. It will be subject to passive settlement treatment and then transferred to a clean water pond, following appropriate treatment in the water treatment plant (WTP). Water from within the clean water pond will be utilised within the wider southern portal area, as far as practicable or discharged, within the requirements of the discharge consent environmental permit (EPR/QB3092NR/A001) for the pond. 2 Technical Summary 2.1.1 The STP is designed to treat slurry generated by the operation of the two tunnel boring machines used to bore the Chiltern Tunnel, which is being constructed as part of the HS2 route through Buckinghamshire. The STP will recover solid material from the slurry for landscaping purposes and regenerated (recovered) slurry for reuse in tunnelling operations. This is classified as an R5 operation. It is located at the construction OFFICIAL Page 2 Chiltern Tunnel South Portal – Slurry Treatment Plant Environmental Permit Application Supporting Information EAWML 404489 Document no: 1MC05-ALJ-EV-APP-CS02_CL03-000001 Revision: C01 compound, at the southern portal of the Chiltern Tunnel, from where the TBM’s are launched. 2.1.2 The southern portal is located at National Grid Reference (NGR) TQ 02652 91119. The southern portal site to be developed is currently arable land. Adjacent land uses include the M25 motorway, 370m to the west of the site, and immediately to the south is arable land. The nearest key receptors (excluding the rest of the site, the visitor centre and worker accommodation) include: Denham Park Quarry which is located 500m to the south west of the site, HydeAway Spa located 680m to the north west of the site and residential properties off Old Uxbridge Road located 900m east of the site.
Load more

Recommended publications
  • Colne River Valley
    1. Colne River Valley Key plan Description The Colne River Valley Natural Landscape Area follows the Colne Within the northern Colne Valley, the settlement pattern is relatively River north to south on the western fringe of Greater London, from sparse, although there is a corridor of villages along the Grand Union Stocker’s Lake near Batchworth in the north to Heathrow Airport in Canal. To the south the valley is more densely developed than the the south. Between Batchworth and Uxbridge the valley floor consists north, with industrial towns such as Uxbridge, Yiewsley and West of a series of lakes and reservoirs, edged by ridges and plateaux within Drayton and London’s largest airport, Heathrow. The historic cores the neighbouring Ruislip Plateau (NLA 2) and the Hayes Gravels (NLA which remain within the settlements of Harefield, Uxbridge, West 10). As the River Colne meanders south and the Grand Union Canal Drayton and Harmondsworth suggest how settlement patterns have heads east, the topography gradually levels; historically the River evolved within this area. Despite the intense residential and industrial Colne would have meandered wider here, resulting in an extensive development around Uxbridge, the linear open space corridors area of deep silt soil across an exceptionally wide floodplain. The that follow the River Colne, Grand Union Canal and the lakes that Colne River Valley has been and continues to be important both as a they support are dominant landscape features. The waterways and 1. Colne River Valley River Colne 1. source of water and for trade navigation. lakes are typically bordered by marginal wetland vegetation and wooded areas.
    [Show full text]
  • COLNE VALLEY – LANDSCAPE on the EDGE Landscape Conservation Action Plan - March 2018
    COLNE VALLEY – LANDSCAPE ON THE EDGE Landscape Conservation Action Plan - March 2018 Chair of Landscape Partnership Lead Partner Colne Valley Park Community Interest Company Friends of the Colne Valley Park Spelthorne Natural History Society Front cover photo of Stockers Lake – Greg Townsend provide an essential project management tool for effective and efficient delivery. The partnership involved in preparing this LCAP considers it to be a compelling, innovative and realistic bid, with a range of projects which will connect people, biodiversity and access. ‘Colne Valley – Landscape on the Edge’ meets all the objectives of the Heritage Lottery Landscape The Landscape Partnership programme, run by the Heritage Lottery Partnership programme, with each of the projects proposed under the Fund, seeks to ‘conserve areas of distinctive landscape character’ and Scheme meeting at least one objective. promote a ‘holistic and balanced approach to the management of landscape heritage at a landscape scale’. Landscape Conservation Action Covering parts of Berkshire, Buckinghamshire, Greater London, Plans (LCAPs) required as part of this programme, provide the foundation Hertfordshire and Surrey, ‘Colne Valley – Landscape on the Edge’ will for planned work to benefit heritage, people and communities and are harness and stimulate organisations and communities across the area to needed in order to secure the Heritage Lottery Fund grant towards the support and sustain delivery. Residents and visitors will gain positive proposed work. perceptions about the area, will learn more about the landscape and feel more confident about exploring it. They will be supported to assist in Our LCAP, ‘Colne Valley – Landscape on the Edge’, comprises a suite of ‘shaping their place’, and feel more motivated to venture out and enjoy exciting projects (the Scheme), and seeks to: set these in the landscape the area, and to participate in efforts to improve and maintain it.
    [Show full text]
  • Colne Valley | CFA7 | Clevle Valley Colne
    LONDON-WEST MIDLANDS ENVIRONMENTAL STATEMENT ENVIRONMENTAL MIDLANDS LONDON-WEST | Vol 2 Vol LONDON- | Community Forum Area report Area Forum Community WEST MIDLANDS ENVIRONMENTAL STATEMENT Volume 2 | Community Forum Area report CFA7 | Colne Valley | CFA7 | Colne Valley November 2013 VOL VOL VOL ES 3.2.1.7 2 2 2 London- WEST MIDLANDS ENVIRONMENTAL STATEMENT Volume 2 | Community Forum Area report CFA7 | Colne Valley November 2013 ES 3.2.1.7 High Speed Two (HS2) Limited has been tasked by the Department for Transport (DfT) with managing the delivery of a new national high speed rail network. It is a non-departmental public body wholly owned by the DfT. A report prepared for High Speed Two (HS2) Limited: High Speed Two (HS2) Limited, Eland House, Bressenden Place, London SW1E 5DU Details of how to obtain further copies are available from HS2 Ltd. Telephone: 020 7944 4908 General email enquiries: [email protected] Website: www.hs2.org.uk High Speed Two (HS2) Limited has actively considered the needs of blind and partially sighted people in accessing this document. The text will be made available in full on the HS2 website. The text may be freely downloaded and translated by individuals or organisations for conversion into other accessible formats. If you have other needs in this regard please contact High Speed Two (HS2) Limited. Printed in Great Britain on paper containing at least 75% recycled fibre. CFA Report – Colne Valley/No 7 | Contents Contents Contents i 1 Introduction 3 1.1 Introduction to HS2 3 1.2 Purpose of this report 3
    [Show full text]
  • A Review of the Ornithological Interest of Sssis in England
    Natural England Research Report NERR015 A review of the ornithological interest of SSSIs in England www.naturalengland.org.uk Natural England Research Report NERR015 A review of the ornithological interest of SSSIs in England Allan Drewitt, Tristan Evans and Phil Grice Natural England Published on 31 July 2008 The views in this report are those of the authors and do not necessarily represent those of Natural England. You may reproduce as many individual copies of this report as you like, provided such copies stipulate that copyright remains with Natural England, 1 East Parade, Sheffield, S1 2ET ISSN 1754-1956 © Copyright Natural England 2008 Project details This report results from research commissioned by Natural England. A summary of the findings covered by this report, as well as Natural England's views on this research, can be found within Natural England Research Information Note RIN015 – A review of bird SSSIs in England. Project manager Allan Drewitt - Ornithological Specialist Natural England Northminster House Peterborough PE1 1UA [email protected] Contractor Natural England 1 East Parade Sheffield S1 2ET Tel: 0114 241 8920 Fax: 0114 241 8921 Acknowledgments This report could not have been produced without the data collected by the many thousands of dedicated volunteer ornithologists who contribute information annually to schemes such as the Wetland Bird Survey and to their county bird recorders. We are extremely grateful to these volunteers and to the organisations responsible for collating and reporting bird population data, including the British Trust for Ornithology, the Royal Society for the Protection of Birds, the Joint Nature Conservancy Council seabird team, the Rare Breeding Birds Panel and the Game and Wildlife Conservancy Trust.
    [Show full text]
  • All London Green Grid River Colne and Crane Area Framework
    All River Colne and Crane London Area Framework Green Grid 10 Contents 1 Foreword and Introduction 2 All London Green Grid Vision and Methodology 3 ALGG Framework Plan 4 ALGG Area Frameworks 5 ALGG Governance 6 Area Strategy 8 Area Description 12 Strategic Context 14 Vision 18 Objectives 22 Opportunities 23 Project Identification 28 Clusters 30 Projects Map 34 Rolling Projects List 44 Phase One Early Delivery 46 Project Details 66 Forward Strategy 68 Gap Analysis 70 Recommendations 72 Appendices 74 Baseline Description 76 ALGG SPG Chapter 5 GGA10 Links 78 Group Membership Note: This area framework should be read in tandem with All London Green Grid SPG Chapter 5 for GGA10 which contains statements in respect of Area Description, Strategic Corridors, Links and Opportunities. The ALGG SPG document is guidance that is supplementary to London Plan policies. While it does not have the same formal development plan status as these policies, it has been formally adopted by the Mayor as supplementary guidance under his powers under the Greater London Authority Act 1999 (as amended). Adoption followed a period of public consultation, and a summary of the comments received and the responses of the Mayor to those comments is available on the Greater London Authority website. It will therefore be a material consideration in drawing up development plan documents and in taking planning decisions. The All London Green Grid SPG was developed in parallel with the area frameworks it can be found at the following link: http://www.london.gov.uk/publication/all-london- green-grid-spg . This part of London is endowed with high quality green space including the spectacular countryside Foreword on the edge of the city in the Colne Valley, the ancient Ruislip Woods and in the Crane Valley, the emerging Crane Park and Yeading Brook Meadows, an extensive area of countryside now entirely encapsulated by the expansion of London.
    [Show full text]
  • EA Colne Cams Document.Qxd
    water abstraction getting the balance right The Colne Catchment Abstraction Management Strategy December 2007 We are the Environment Agency. It’s our job to look after your environment and make it a better place – for you, and for future generations. Your environment is the air you breathe, the water you drink and the ground you walk on. Working with business, Government and society as a whole, we are making your environment cleaner and healthier. The Environment Agency. Out there, making your environment a better place. Published by: Environment Agency Rio House Waterside Drive, Aztec West Almondsbury, Bristol BS32 4UD Tel: 08708 506506 Email: [email protected] www.environment-agency.gov.uk © Environment Agency All rights reserved. This document may be reproduced with prior permission of the Environment Agency. Colne Rivers CAMS area overview River Ver HARPENDEN River Gade HEMEL HEMPSTEAD ST ALBANS HATFIELD BERKHAMSTED River Bulbourne River Colne CHESHAM River Chess AMERSHAM WATFORD River Misbourne RICKMANSWORTH BEACONSFIELD River Colne CHALFONT COMMON SLOUGH Legend Towns The Colne CAMS area N CAMS Rivers Other rivers Grand Union Canal (c) Crown Copyright. All rights reserved. Environment Agency 100026380, (2006) 0105 20 Kilometres Environment Agency Catchment Abstraction Management Strategy 1 Contents Section 1 Your Local CAMS 4 Section 2 The Colne CAMS area 6 2.1 Introduction to CAMS area 6 2.2 Hydrology and geology 6 2.3 Conservation 7 2.4 Ecology and fisheries 7 2.5 Industry and agriculture 7 2.6 Water quality 7
    [Show full text]
  • Appendix 2 Field Survey Sheet
    Appendix 2 Field Survey Sheet Land Use Consultants BUCKS LCA FIELD SURVEY FORM LANDSCAPE TYPE: DRAFT LANDSCAPE CHARACTER AREA: DATE: TIME: WEATHER: PHOTOGRAPH NUMBERS……………………………………………………………………... LOCATION AND BOUNDARIES……………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… KEY WORDS/SUMMARY OF LANDSCAPE CHARACTER……………………………..... ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… .................................................................................................................................................... ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… .................................................................................................................................................... ………………………………………………………………………………………………………… .................................................................................................................................................... PHYSICAL INFLUENCES GEOLOGY................................................................................................................................ .................................................................................................................................................... SOILS ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ELEVATION Lowland (under 50m) Transitional (50- Upland (over 200m) 200m) LANDFORM Flat Steep
    [Show full text]
  • Sustainability Appraisal of the Chiltern and South Bucks Local Plan
    Sustainability Appraisal of the Chiltern and South Bucks District Local Plan SA Scoping Document November 2015 LEPUS CONSULTING LANDSCAPE, ECOLOGY, PLANNING & URBAN SUSTAINABILITY Sustainability Appraisal of the Chiltern and South Bucks District Local Plan Scoping Report LC-216 Document Control Box Client Chiltern District Council & South Bucks District Council Report Title Sustainability Appraisal of the Chiltern & South Bucks Local Plan Number 1 Status Final Filename LC-216_Scoping_4_271115SS.docx Date November 2015 Author RMC Reviewed SBS Approved NJD Contains public sector information licensed under the Open Government Licence v1.0 About this report & notes for readers Lepus Consulting Ltd (Lepus) has prepared this draft report for between October and November 2015 and is subject to and the use of Chiltern and South Bucks District Councils. There are a limited by the information available during this time. number of limitations, which should be borne in mind when considering the results and conclusions of this report. No party should alter or change this report whatsoever without written This report has been produced to assess the sustainability effects permission from Lepus. of the Local Plan and meets the requirements of the SEA Directive. It is not intended to be a substitute for Environmental © Lepus Consulting Ltd Impact Assessment (EIA) or Appropriate Assessment (AA). SA is a tool for predicting potential significant effects. The actual For further information on the differences between the products effects may be different from those identified. Prediction of please see: effects is made using an evidence-based approach and http://www.rspb.org.uk/Images/environmentalassessment_tcm incorporates a judgement. 9- 257008.pdf The assessments above are based on the best available Client comments can be sent to Lepus using the following information, including that provided to Lepus by the Council and address.
    [Show full text]
  • Roving Flocks Meet the Charismatic Tit Family 8
    Autumn 2019 NEWS FROM YOUR LOCAL WILDLIFE TRUST AND FROM AROUND THE UK Roving flocks Meet the charismatic tit family 8 >> Bud-ding Detective >> Life and Death How to identify trees Find out what lives in in winter 18 and on deadwood 26 PROTECTING WILDLIFE FOR THE FUTURE WILDLIFEWILDLIFE TRAVELTRAVEL More than 30 years of supporting nature conservation, ALL our profits are donated to the Wildlife Trusts, raising in excess of £220,000 since 1988. Travel with us and help to protect your local wildlife. 2020/21 destinations include: Botswana, Ethiopia Chile, Colombia, Galapagos, Costa Rica Macedonia, Morocco, Armenia Scilly, Dorset, Devon, Burren France by train relaxed pace Poland Lesvos expert leaders small friendly groups natural history holidays ATOL protected No. 808 No. protected ATOL www.wildlife-travel.co.uk 01954 713575 Give the Gift of Wildlife this Christmas Explore our range of Wild Gifts online athertswildlifetrust.org.uk/shop Christmas Cards Experience Vouchers Wildlife Sponsorships 10 for £5 from £10 £20 Bug Explorer Kits £10 Gift Membership Give the gift that keeps on giving. Treat a loved one to their own T-shirts Identification guides membership of the Trust for a £19 from £3.30 whole year. From just £42. 2 wildlifematters Autumn 2019 Autumn 2019 contents NEWS FROM YOUR LOCAL WILDLIFE TRUST AND FROM AROUND THE UK CONSERVATION 4 Celebrating wildlife Festival of Wildlife and Apple Day highlights 5 Rare bat population found A new population of barbastelle bats discovered near Stevenage 6 A shore thing New shoresearch programme
    [Show full text]
  • Broadwater Lake
    Broadwater Lake y A haven for a huge e l number and variety l of water birds, a V Broadwater Lake e forms part of the n Mid-Colne Valley l o Site of Special C Scientific Interest. e h t e r Type of habitat Spring o Lake, river, woodland . FINDING THE RESERVE Migrant birds arriving – swallows, l Denham Green . house martins and sand martins p Location feeding close to the water and x Best time to visit warblers. Keep an eye out for Something to see all year . common terns returning to breed. E Size of reserve 19.4ha (48 acres) . Walk time 1-1½ hours. Access on site Can be very muddy after rain fall; Common tern watch out for vehicle ruts on the access track. No wheelchair access. Summer Great for dragonflies around the Walking and cycling margins of the water. Superb bat Grand Union Canal towpath; watching on warm evenings Colne Valley Trail including Daubenton’s bats flying www. colnevalleypark.org.uk over the river. TQ 045 884 . OS map ref. Autumn Postcode UB9 5NL . Migrant birds heading south, Goosander moulting ducks in large numbers . Access to site Pedestrian access Winter via a gate from Moorhall Road . Wintering wildfowl including visitors such as smew, goosander From A412 in Denham By road and goldeneye . Green turn right onto Moorfield Road. Turn left and park on Link Way, walk back along the road Reserve Officer’s tip Broad-bodied chaser and turn left onto Moorhall Road. Robert Hopkins Reserve entrance 5 minute walk “A great place to get away on the left, just beyond river from it all and see plenty of bridge.
    [Show full text]
  • Colne Valley BOA Statement December 2010 Colne Valley
    Colne Valley Biodiversity Opportunity Area Statement Area Coverage 1748 ha Number of Local wildlife sites 1 Designated Sites SSSI 2 Local nature reserve 1 BAP Habitat Lowland Meadow 1 ha Purple Moor Grass & Rush Pastures 2 ha Reedbeds 4.5 ha Wet Woodland 0.5 ha Lowland Mixed Deciduous Woodland 9 ha The Colne Valley is located on the south eastern corner of Bucks. The Colne flows through Herts before forming the boundary between Bucks and London and into Surrey. The Colne Valley BOA is contiguous with the Colne Valley Key Biodiversity Area in Herts and there are SSSIs close to the borders in Hillingdon and Surrey. It is also connected to the South Bucks Heaths & Parklands and Central Chilterns Chalk Streams BOAs Joint Thames Valley Character Area Landscape Mostly wetland and agricultural, with woodlands limited to watercourses. Types The areas around Denham Green and Rush Green are wooded agricultural Geology Mostly mudstone with chalk in the Misbourne Valley and around Denham overlain with sands, silt and gravels. Topography A shallow flat bottomed valley. Biodiversity Rivers and Streams – The River Colne provides a valuable route for species movement between the Thames and Hertfordshire. Lakes – There is one eutrophic standing water SSSI in Bucks – the Mid Colne Valley SSSI reservoirs. There are also open water SSSIs close to the border with Bucks in the Herts and Surrey sections of the Colne Valley. Reedbed – There are reedbeds in the Mid Colne Valley SSSI. Woodland – There are wet woodlands at Old Rectory Meadows and Denham Marsh Wood SSSIs (the latter is in Hillingdon) and small areas of wet woodland fringing the rivers and streams.
    [Show full text]
  • Chiltern and Wycombe District Councils Local
    Local Environmental Management Plan – Chiltern and Wycombe District Councils Document no.: 1EW03-FUS-EV-PLN-C000-002626 Revision Date Author Checked by Approved by Revision Details: P01 Dec 2017 William Melanie Knight, Bianca Rees, First Issue to HS2 Burke Fusion Fusion C02 July 2018 William Charlotte Liz Greenway Update Burke Harper i Contents 1 Introduction 5 1.2 Area and scope 7 2 Purpose of the Local Environmental Management Plan 8 3 Policy and environmental management principles 8 4 Implementation 8 5 General requirements 9 5.2 Community relations 9 5.3 Construction site layout and good housekeeping 11 5.4 Site lighting 11 5.5 Worksite security 11 5.6 Hoardings, fencing and screening 12 5.7 Unexploded ordnance 13 5.8 Electromagnetic interference 13 5.9 Temporary living accommodation 13 5.10 Occupational healthcare 13 5.11 Clearance and re-instatement of sites on completion 13 5.12 Pollution incident control and emergency preparedness 13 5.13 Fire prevention and control 14 5.14 Extreme weather events 14 5.15 Carbon management plans 14 5.16 Interface management between adjacent construction areas 14 6 Agriculture, forestry and soils 15 6.2 Sensitive receptors 15 6.3 Local control measures 15 7 Air quality 16 7.2 Sensitive receptors 16 7.3 Local control measures 17 7.4 Monitoring Procedures 18 8 Cultural heritage 19 8.2 Sensitive receptors 19 8.3 Local control measures 20 8.4 Monitoring 21 ii Document title: Local Environmental Management Plan – Chiltern and Wycombe District Councils Document no: 1EW03-FUS-EV-PLN-C000-002626 Rev: C02
    [Show full text]