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Issue 1 – October 2014

Issue 2 – 14 October 2014

Issue 3 – 28 October 2014

FLOOD RISK ASSESSMENT: PROLOGIS PARK, RYTON,

SITE C, APPLICATION J PROLOGIS UK LTD

Our Ref: AAC5138 RPS Highfield House, 5 Ridgeway, Quinton Business Park, Birmingham, B32 1AF Tel: 0121 213 5500 Fax: 0121 213 5502 Email: rpsbm@rpsgroup.com

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QUALITY MANAGEMENT

Prepared by: Oliver Pocock

Authorised by: Martin Probert

Date: 09 October 2014

Project Number/Document Reference:

AAC5138

Issue: 09 October 2014

Issue 1

Issue 2: 14 October 2014

Minor amendments to report following comments from Client.

Issue 3: 28 OCTOBER 2014

Appendix B (Site Parameters Plan) updated to latest revision.

COPYRIGHT © RPS

The material presented in this report is confidential. This report has been prepared for the exclusive use of Prologis UK Ltd and shall not be distributed or made available to any other company or person without the knowledge and written consent of RPS. The contents of this report are offered without prejudice.

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CONTENTS

1 INTRODUCTION ............................................................................................................................... 5 2 SITE DETAILS................................................................................................................................... 7 3 SCOPING STUDY ............................................................................................................................. 9 4 FLOOD RISK ASSESSMENT ...........................................................................................................13 5 RECOMMENDED FLOOD MITIGATION...........................................................................................16 6 CONCLUSION & RECOMMENDATIONS .........................................................................................18 APPENDICES ............................................................................................................................................19 APPENDIX A ..............................................................................................................................................20

Area A, B, and C Allowable Discharge Rates.....................................................................................20 APPENDIX B ..............................................................................................................................................21

Site Parameters Plan ........................................................................................................................21

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GENERAL NOTES

The following notes should be read in conjunction with this report:

1. The report contains only available factual data for the site, which was obtained from the sources, described in the text. These data were related to the site on the basis of the location information made available to RPS by the client.

2. The assessment of the site is based on information supplied by the client. Relevant information was also obtained from other sources.

3. The report reflects both the information provided to RPS in documents made available for review and the results of observations and consultations with RPS staff.

4. Where data have been supplied by the client or other sources, including that from previous site audits or investigations, it has been assumed that the information is correct but no warranty is given to that effect. While reasonable care and skill has been applied in review of this data no responsibility can be accepted by RPS for inaccuracies in the data supplied.

5. This report is prepared and written in the context of the proposals stated in the introduction to this report and its contents should not be used out of context. Furthermore new information, changed practices and changes in legislation may necessitate revised interpretation of the report after its original submission.

6. The copyright in the written materials shall remain the property of RPS Company but with a royalty-free perpetual licence to the client deemed to be granted on payment in full to RPS Company by the client of the outstanding amounts.

7. The contents of this report are offered without prejudice.

8. This report contains Environment Agency information © Environment Agency and database right.

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EXECUTIVE SUMMARY

RPS Planning and Development has been commissioned to undertake a Flood Risk Assessment (FRA) on behalf of Prologis for an outline planning application, relating to commercial development at Ryton-on-Dunsmore. The site has a total area of 13.6ha, and is part of a larger 55 hectare site, previously a Peugeot Works, comprising predominantly of industrial buildings and surface parking space. As such, it is classified as a brownfield site.

The site is identified by the Environment Agency flood map which is available online as being located within Flood Zone 1. According to the Environment Agency Indicative Floodplain Map there is a ‘Low Probability’ of flooding in this area i.e. a less than 1 in 1000 annual probability of flooding.

A Flood Risk Assessment is required to comply with the National Planning Policy Framework and the associated Planning Practice Guidance (March 2014) as the application site is over 1 hectare in size.

As part of the site appraisal process it has been necessary to demonstrate that the proposed development can be achieved with no risk of flooding and without increasing flood risk to third parties. This report describes the methods used and the results of this study. The report takes into account the recommendations of the National Planning Policy Framework and the associated Technical Guidance.

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1 INTRODUCTION

1.1 Project Brief

RPS Planning and Development has been commissioned to carry out an assessment to satisfy the Environment Agency’s (EA) requirements for a Flood Risk Assessment (FRA) to support an application for a new build development, comprising warehouse(s) and offices/ancillary buildings, a service yard area, car parking, access road, and landscaped areas at Prologis Park, Ryton-on-Dunsmore.

The FRA is prepared in full accordance with the National Planning Policy Framework (NPPF) and its associated Planning Practice Guidance (March 2014) which now supersedes Planning Policy Statement 25: ‘Development and Flood Risk’ (PPS25). The FRA is required to identify the 1% (1 in 100 year) and 1%+allowance for climate change flood extents and levels for the site and ensure that all aspects of development are clear of the 1%+ allowance for climate change floodplain.

1.2 Assessment Procedure

This report has been prepared in accordance with the requirements of NPPF. This assessment also gives due consideration to the guidance provided in the CIRIA publication, C624, Development and Flood Risk: Guidance for the Construction Industry, 2004, and The Floods and Water Management Act 2010.

An assessment of the flood risk to the proposed development has been considered on the basis of the best information available at the date of this report. The assessment herein is deemed appropriate to the requirements of the Environment Agency, the scale and nature of the development, and the available data. The key elements of this assessment are as follows:

Desk study scoping exercise;

Review of site topography and development proposals;

Identification of data corresponding to appropriate design flood events;

Consideration of climate change;

Consideration of flood risks to and from the development;

Calculation of the impact of the development on surface water run-off, and;

Recommended attenuation measures.

1.3 National Planning Policy Framework (NPPF)

The National Planning Policy Framework (NPPF) and the associated Planning Practice Guidance was updated in March 2014 and supersedes Planning Policy Statement 25 (PPS 25), which was published by Communities and Local Government, December 2006.

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The NPPF sets out Government’s planning policies for England and how these are expected to be applied. It replaces over a thousand pages of national policy with around fifty, written simply and clearly. The purpose of the policy is ultimately to achieve sustainable development.

In relation to flood risk NPPF stresses the importance of taking into account the consequences, and not just the probability, of future flooding events. It clarifies the sequential test as a risk based approach to be applied at all stages of the planning process, to steer new development to areas at the lowest probability of flooding.

The EA is a statutory consultee for all planning applications and will give comment and recommendations to the planning authority for any proposed developments affecting a watercourse.

NPPF confirms that Strategic Flood Risk Assessments (SFRA) should be carried out by the local planning authority to inform the preparation of Local Development Documents (LDDs), having regard to catchment wide flooding issues which affect the area. The SFRA will provide the information needed to apply the sequential approach.

1.4 Requirements of National Planning Policy Framework

For a FRA proportionate to the risk and appropriate to the scale, nature and location of the development the following will need to be considered;

the risk of flooding arising from the development in addition to the risk of flooding to the development;

take the impacts of climate change into account;

the potential adverse and beneficial effects of flood risk management infrastructure including raised defences, flow channels, flood storage areas and other artificial features together with the consequences of their failure;

the vulnerability of those that could occupy and use the development, taking account of the Sequential and Exception Tests and the vulnerability classification, including arrangements for safe access;

quantify the different types of flooding (whether from natural and human sources and including joint and cumulative effects) and identify flood risk reduction measures, so that assessments are fit for the purpose of the decisions being made;

the effects of a range of flooding events including extreme events on people, property, the natural and historic environment and river and coastal processes;

include the assessment of the remaining (known as ‘residual’) risk after risk reduction measures have been taken into account and demonstrate that this is acceptable for the particular development or land use;

how the ability of water to soak into the ground may change with development, along with how the proposed layout of the development may affect drainage systems; and

be supported by appropriate data and information, including historical information on previous events.

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2 SITE DETAILS

2.1 Site Overview

The site is located to the south east of Coventry (National Grid Reference 438100, 274003). The site is classified as a brownfield site and is indicated by the red line boundary in Figure 2.1 below. A detailed site location plan is included within Appendix A; the application site is indicated by the green line boundary.

Figure 2.1: Site Location Plan and Site Specific Data and Consultees

Based upon the Ordnance Survey map with the Permission of the Controller of Her Majesty’s Stationery Office. © Crown copyright Licence No. 100020449 – Red line indicates approximate site boundary only.

OS NGR SP 381 740 Local Planning Authority Rugby Borough Council Environment Agency Office Midlands Central Area Office

Water Utility Company Severn Trent Water

2.2 Site Description and Surrounding Area

The application site is located to the south east of Coventry, approximately 4 miles from Junction 29 of the M1. Site access is by way of the A423 Oxford road to the north west of the site. The eastern site boundary includes a primary school, farm, and residential buildings associated with Ryton Village. Site B of Prologis Park is located to the north west, where a number of distribution units have been recently constructed.

The site was historically a Peugeot assembly plant, consequently existing ground conditions comprise large areas of hardstanding and made ground. The River Avon is located approximately 1.1km west of the site.

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2.3 Development Proposals

This report relates specifically to development of Area C, which has a total site area of approximately 13.6ha. It is proposed that approximately 65% (8.8ha) of the site will be covered by impermeable material (paving/roof areas). The development of the site will comprise warehouse(s) and offices/ancillary buildings, a reinforced service yard area for heavy goods vehicles, a bituminous/block paved car park, a bituminous access road, and landscaping zones. The Parameters Plan included as Appendix B illustrates the proposed land allocations within the site.

The land on the Application Site has an extant outline planning permission, reference R13/0451, which permitted the development of Site C for up to 40,000m2 of employment space, comprising of Class B8 (storage and distribution), Class B1(c)/B2 (light industry and general industry), including vehicle parking and landscaping; vehicle access from the A423 Oxford Road; importation of fill material to site to increase ground levels; retention of areas of nature conservation; biodiversity enhancements; and improvements to public footpaths. Accompanying this planning application was a Flood Risk Assessment, report number 50600472, dated 23/03/2013, updated 03/06/2013, completed by WSP.

The purpose of this report is to determine any flood risk constraints specifically for the development. Reference is made to the previously completed WSP Flood Risk Assessment, identified above.

Reference is also made to the ‘Proposed Surface Water Drainage Strategy’ prepared by Faber Maunsell Consultants, dated July 2007, submitted as part of the initial Outline Planning Applications for the redevelopment of the Peugeot Works. The report by Faber Maunsell sets out the drainage strategy for the entire site of the former Peugeot Works, and therefore defines the allowable surface water and foul water drainage discharges for Areas A, B, and C, which have already been approved.

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3 SCOPING STUDY

3.1 Site Overview

The Environment Agency is responsible for the provision of information pertaining to flood risk from tidal and main watercourses throughout England and Wales. The EA provides an online information service through its Flood Map data. This data is not intended to provide detailed flood information for individual properties, but does provide a useful resource at the scoping stage. An extract from the Flood Map is given in Figure 3.1 below and indicates that the site is fully located within Flood Zone 1. These are areas where there is less than 1 in 1000 year (0.1%) chance of flooding from rivers in any one year.

Figure 3.1: Extract from EA Flood Map (downloaded on 02/10/2014)

Based upon the Ordnance Survey map with the Permission of the Controller of Her Majesty’s Stationery Office. Crown copyright Licence No. 100020449 RPS Design Group Ltd Red line illustrates approximate site boundary only.

3.2 Strategic Flood Risk Assessment, January 2008

A Strategic Flood Risk Assessment (SFRA) was completed for Rugby Borough Council, alongside Stratford on Avon District Council, Warwickshire County Council, and North Warwickshire Borough Council in January 2008 by Halcrow Group Limited. This has subsequently been updated by URS Infrastructure and Environment in 2013, following the revocation of regional spatial strategies, introduction of the NPPF and the Flood and Water Management Act, as well as the national surface water flood maps. The SFRA is used as a tool by the planning authority for the production of development briefs, setting constraints, identifying locations of emergency planning measures and requirements for Flood Risk Assessments. It also provides an assessment and categorisation of flood risk on a district wide basis in accordance with PPS25 (now NPPF). SFRA’S can be used to provide an indication of the likely flood risk issues at a site from all sources of flooding.

The SFRA states that an FRA completed for a site within the region should consider the risk from alternative sources of flooding such as groundwater and pluvial flooding. The proposed

Flood Zone 3. Flooding from rivers or sea without defences (1 in 100yr).

Flood Zone 2. Extent of extreme flood (1 in 1000yr). Flood Zone 1. Areas not coloured (< than 1 in 1000yr).

Flood defences

Areas benefiting from flood defences

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development should also consider surface water run-off to ensure that there are no detrimental effects to existing development and where possible water should be disposed of through sustainable drainage systems.

No information is provided specifically in relation to the development site within the SFRA, although Flood Map A1 vii confirms the site’s location within flood zone 1. All potential sources of flooding highlighted within the SFRA will be fully considered within this report.

3.3 Preliminary Flood Risk Assessment for Warwickshire

Royal Haskoning completed a Preliminary Flood Risk Assessment on behalf of Warwickshire County Council, dated May 2011, a statutory obligation arising from the Flood Risk Regulations 2009. The purpose of the Preliminary Flood Risk Assessment was to assess surface water flooding through readily available information obtained from a data collections exercise on past and future flooding. The assessment identifies any flood risk areas firstly of national significance and then of local significance. Rugby Borough Council is one of the five District / Borough Authorities included within the County of Warwickshire.

The application site was not highlighted as within a locally significant flood risk area.

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3.4 National Planning Policy Framework – The Sequential Test

As set out in the NPPF and the associated Technical Guidance, the aim of the Sequential Test is to steer new development to areas with the lowest probability of flooding. Strategic Flood Risk Assessments provide the basis for applying the sequential test, where information is not available in a Strategic Flood Risk Assessment the Sequential Test will be based on the Environment Agency Flood Zones.

The Indicative Flood Plain Map contained within Section 3.1 confirms that the whole site is within Flood Zone 1 ‘low probability’. NPPF Technical Guidance Table 2 shows the proposed development as within the Flood Risk Vulnerability classification of “less vulnerable” (this includes buildings used for; shops, financial, professional and other services, general industry, storage and distribution). Therefore based on the EA flood zone classification of the development, Table 3 in NPPF ‘Technical Guidance’ (see Table 3.1 below), indicates that development is appropriate.

Table 3.1: NPPF Technical Guidance Table 3: Flood Risk Vulnerability and Flood Zone ‘Compatibility’

Flood Risk Vulnerability Classification

Essential Infrastructure

Water Compatible

Highly Vulnerable

More Vulnerable

Less Vulnerable

Floo

d Zo

ne

Zone 1

Zone 2 Exception Test

required

Zone 3a Exception Test required

X Exception Test

required

Zone 3b ‘Functional Floodplain’

Exception Test required

X X X

Key:

Development is appropriate

X Development should not be permitted

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3.5 Mechanisms of Flooding

To understand the risk of flooding to a site, it is imperative that potential sources of flooding be clearly defined. The likelihood and severity of flooding depends on the characteristics of the flood sources and the degree to which the site is currently, or can potentially, be protected against flooding from these sources. Table 3.2 reviews the potential risk of flooding at the proposed site from different sources.

Table 3.2 Potential Risk of Flooding to the Proposed Development

Source of Flooding Potential

Comments High Med Low

Fluvial (Rivers) X The entire site is located within Flood Zone 1 (Low Probability)

Tidal/Coastal N/A The site is located far inland and there is no risk of tidal flooding

Pluvial (drainage system) X

Unlikely as drainage systems will be designed to accommodate flows up to the 1 in 100 year + CC event.

Surface Run-off X Areas of impermeable material mitigated through appropriately sized on site drainage systems.

Ponding X

Ponding will only occur in designated areas under extreme events. Later stages of this report and the accompanying drainage strategy report confirms that this will not cause risk to property or third parties.

Groundwater X

Potential risk of groundwater flooding due to proximity of water table to present ground level in certain areas. Later stages of this report confirms mitigation provided ensures this does not pose a risk to the development.

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4 FLOOD RISK ASSESSMENT

4.1 Introduction

Following the scoping exercise, the potential flood risks to the site have been investigated in greater detail, to ascertain whether the risks are acceptable to the nature of the proposed development. Opportunities to mitigate these risks are discussed in Chapter 5 of this report.

4.2 Fluvial (Rivers)

There are no Environment Agency designated main rivers within the site or within the immediate surrounding area. The River Avon is located, at its closest, approximately 1.1km west of the site. The Environment Agency on-line flood map shows that the site lies fully within Flood Zone 1, these are areas where there is less than 1 in 1000 year (0.1%) chance of flooding from rivers in any one year. This is confirmed by the updated Rugby SFRA; flood map A1 vii illustrates the site to be fully located within Flood Zone 1. Due to the distance of the most nearby watercourse from the proposed development, fluvial flooding is not considered to pose a risk to development.

4.3 Pluvial and Surface Run-off

Pluvial flooding is defined as flooding resulting from rainfall-generated overland flow, before the run-off enters any watercourse or sewer. It is usually associated with high intensity rainfall events (typically >30mm/h) but can also occur with lower intensity rainfall or melting snow where the ground is saturated, frozen, developed or otherwise has low permeability resulting in overland flow and ponding in depressions in the topography. Urban pluvial flooding arises from high intensity ‘extreme’ rainfall events. In such situations urban underground sewerage/drainage systems and surface watercourses may be completely overwhelmed.

An extract from the EA’s surface water flood risk mapping is provided in Figure 4.1. The mapping shows small areas of the site at risk of surface water flooding, however through the implementation of an on site surface water drainage system these areas would become positively drained.

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Figure 4.1: Extract from EA Flood Map (downloaded on 02/10/2014)

Red line indicates approximate site boundary only.

Due to the re-profiling of the site to enable development to take place and the implementation of a surface water sewerage system the proposed buildings are not considered to be at risk of surface water flooding. A bund and ditch are located along the eastern and southern boundaries of the existing site, as identified in WSP’s FRA. These were constructed for site security purposes, rather than as drainage features. The ditch is in continuity with groundwater. As a consequence, it is not advisable to utilise this ditch for attenuation purposes, as available capacity will fluctuate with groundwater levels.

The existing surface water drainage from the former Peugeot Works site discharges into the River Avon through a 1050mm diameter pipe passing below the A45. Modelling undertaken by Faber Maunsell indicated that the existing discharge into the River Avon for a 1:2 year event was 1650l/s (Winter Storm of 30 minute duration). As part of the overall drainage strategy to the site a reduction of 20% to the outfall discharge has already been agreed at 1320l/s. This limit would apply to a 1:100 year event with an allowance of 20% for climate change.

By proportioning the allowable discharge based on the site areas the maximum surface water discharge for Area C is 231l/s.

The drainage systems will accommodate storm return periods up to and including the 1 in 30 year + 20% event. Temporary flooding of less vulnerable areas of the site will occur for storm return periods greater than this, up to and including the 1 in 100 year event plus 20% for climate change.

Attenuation required for extreme return periods (above the 1:30 + 20% to the design 1 in 100 year + 20%) will be contained and stored above ground by temporary flooding of areas as follows –

o Maximum 50mm flooded depth in car park

o Maximum 170mm flooded depth in service yard

o Maximum of 300mm flooded depth in service yard docks

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The accompanying Drainage Philosophy Statement provides further details of the drainage proposals for the site. It is identified that below ground cellular storage units will be provided set above the ground water table in the car park area to attenuate flows up to the 1 in 30 year storm. An existing attenuation pond exits at the site however the water level in this is in continuity with the ground water table and hence it has limited storage capacity. The drainage system has been designed to ensure surface water run-off will not cross any site boundary or enter any of the proposed buildings. The designed limited flooding of less vulnerable areas of the site during storm events will not pose a risk to the development.

4.4 Groundwater

Groundwater flooding is defined as the type of flooding that can be caused by the emergence of water originating from underground. The water may emerge from either point or diffuse locations. Unlike flooding from rivers and the sea, groundwater flooding does not pose a significant risk to life, but is more associated with significant damage to property, with flooding persisting over a number of weeks for some types of groundwater flooding. Groundwater flooding is a significant but localised issue that has attracted an increasing amount of public concern in recent years.

Figure A4 vii of the SFRA identifies the susceptibility of the site to groundwater flooding. The figure identifies the susceptibility of the site to groundwater flooding to be between 50% and 75%. This is based on coarse data, and applied to a 1km square; actual groundwater flood risk will be localised.

Groundwater monitoring indicates that the water table has reached 78.3m AOD- at or close to the existing ground level for the southern area of the site. As a consequence, it will be necessary to increase ground levels to mitigate this flood risk. This is discussed further in section 5, below.

It is noted the site is not indicated to be in a Source Protection Zone.

4.5 Residual Risk

A residual risk remains for the proposed development from rainfall events greater than the 1 in 100 year + 20% design criteria of the proposed drainage system. The risk will be mitigated, as on-site drainage will be designed in accordance with Building Regulations and the latest Sewers for Adoption criteria, as appropriate, to take account of overland flood flow routes and to divert any excess surface water around and away from proposed buildings.

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5 RECOMMENDED FLOOD MITIGATION

5.1 Introduction

This chapter discusses mitigation options that should be considered in order to reduce the severity of flood risk and to minimise the potential hazards associated with any residual flood risk.

5.2 Design Levels

The proposed development lies within Flood Zone 1 and is not considered at risk of fluvial flooding. On site drainage proposals will ensure surface water run-off is quickly diverted towards on site gullies and drainage channels and that on site attenuation is sized appropriately. However, due to the identified groundwater flood risk at, or near to, the southern corner of the site, it is deemed necessary to raise ground levels to mitigate against this risk. The maximum level of groundwater identified during monitoring is 78.3m AOD. As a consequence, ground levels should be set a minimum of 600mm above this level in this area; 78.9m AOD. Finished floor levels should be set above this, in line with Building Regulations requirements and the design flood depths.

5.3 Site Topography and Flood Routing

Where possible, levels should fall away from buildings, and areas where water could dam up against structures should be avoided, even if drainage is provided. Where appropriate freeboard has been designed between the 1 in 100 year + 20% water level and any building floor levels to ensure surface water run-off will not enter any proposed buildings.

The development proposals will be designed to ensure that any overland flows are routed away from buildings, intercepted by gullies and or drainage channels. No surface water will cross any site boundaries.

Flood flow routes should be incorporated as part of detailed engineering designs. Overland flows will be routed towards gullies and storage areas where applicable and not into third party land.

5.4 Sustainable Drainage Systems

It is now commonly a planning requirement to consider utilising sustainable drainage systems (SUDS), if it is appropriate to the specific site conditions. These systems are diverse, but generally aim to provide drainage systems that may facilitate flood and/or pollution control, related to run-off. Such systems are generally ‘soft engineering’ and as a result can be financially, as well as environmentally, attractive engineering solutions.

.The site is underlain by sand and gravel drift deposits with pockets of made ground where former gravel pits have been backfilled. Below this lie low permeability clay and marl of the Mercia Mudstone group to significant depth. Whilst the upper horizons of the River Terrace deposits could act as an infiltration medium the very shallow ground water table precludes the use of soakaways or other infiltration features as a reliable means of accepting surface water run off from the development.

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As noted in section 4.3 It is proposed that the drainage system incorporated into the Site C development will provide a 20% reduction in outfall discharge compared to the current flow for a 2 year storm, as has been previously agreed with the Environment Agency.

5.5 Flood Resistance and Resilience

A basic level of flood resistance and resilience can be achieved by following good building practice and complying with the requirements of the Building regulations 2000 published by the Office of the Deputy Prime Minister (ODPM). Considering the location of the site in Flood Zone 1, and the proposed minimum ground level, it is not deemed necessary to incorporate any flood proofing measures outlined in the Environment Agency’s Floodline Publication ‘Damage Limitation’.

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6 CONCLUSION & RECOMMENDATIONS

The proposed commercial development at Site C, Prologis Park, Ryton has been assessed with regards to flood risk.

6.1 Review of NPPF Objectives

The proposed development will not be affected by current or future flooding from any source.

The development will not increase flood risk elsewhere.

The measures proposed to deal with the effects and risks are appropriate.

The exception test is not required for this assessment as the development site is located within Flood Zone 1 and has a vulnerability classification of “less vulnerable”.

Other origins of flooding have also been assessed and it has been found that there will be no increase in risk of flooding from land, groundwater or sewers as a result of this development, provided the mitigation measures outlined are adhered to.

There are no anticipated negative impacts associated with the proposed development. Positive social, economic and environmental impacts will result from the proposed development provided mitigation measures outlined in Section 5 are adhered to.

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APPENDICES

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APPENDIX A

Area A, B, and C Allowable Discharge Rates Drawing Number: NK017680/SK250

A

4

5

L

o

n

d

o

n

R

o

a

d

A

4

2

3

O

x

f

o

r

d

R

o

a

d

Area 'C'

New Roundabout

Sewage Treatment Works

Existing Outfall to

River Avon

231 l/s Max

inflow from

Area 'C'

New Drain by

Trenport Investments/

Ryton Properties

Area 'A'

Unit 2

SW = 158 l/s

FW = 3 l/s

Unit 4

SW = 87 l/s

FW = 1.5 l/s

Unit 5

SW = 96 l/s

FW = 1.6 l/s

Estate road phase 1

SW = 63 l/s

Estate road phase 2

SW = 30 l/s

Area 'B'

Original site A and B

boundary

Unit 6

SW = 280 l/s

FW = 4.7 l/s

Area A/B

SW = 261 l/s

FW = 4.3 l/s

Sherwood House,

Sherwood Avenue, Newark, Nottinghamshire, NG24 1QQ

T:+44 (0)1636 605 700 E: rpsnewark@rpsgroup.com F:+44 (0)1636 610 696

Client

Title

Status

Checked byDrawn By

Drawing NumberRev

Project

Project Leader

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DescriptionRev

By Ckd Date

_

Date CreatedScale

@

Area A, B and C

Foul & Surface Water

Allowable Discharge Rates

Prologis Park, Ryton

SK250

JKC

BNK017680

JDC DM

Preliminary Oct 20131:7500 A3

A

JDC DM 06.12.13DC3 SW allowance amended

B

JDC JKC 15.07.14Updated for 'Application G' boundaries.

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APPENDIX B

Site Parameters Plan Drawing Number: 30714-PL-102/C