Environmental Statement - IEMA Quarry Redevelopme… · Environmental Impact Assessment (EIA) ......

Environmental Statement

Volume 1 Non-technical

Summary

CONTENTS 1.0 Introduction .............................................................................. 2

2.0 What is Being Proposed ............................................................ 5

3.0 Assessment of Environmental Effects ....................................... 10

4.0 Summary & Conclusions ......................................................... 25

CBRE | ERITH QUARRY

1.0 Introduction

Page

2

INTR

ODUC

TION

BACKGROUND AND CONTEXT

Anderson Design & Build Limited (Anderson) has submitted a hybrid planning application

(comprising part detailed and part outline elements) to the London Borough of Bexley (LB

Bexley) for the redevelopment of Erith Quarry (the site), located at Fraser Road, Erith.

The site is allocated for a range of land uses, including residential and educational facilities,

by the ‘saved’ policies of LB Bexley’s Unitary Development Plan. It is also designated as a

Site of Borough Grade 1 Importance for Nature Conservation (SBG1INC) by the LB Bexley’s

Core Strategy.

A site location plan is shown in Figure NTS1.

Anderson is proposing the redevelopment of the site to provide up to 600 residential units,

as well as a 3-Form Entry Primary School, complementary non-residential/community

floorspace, open space, designated ecological areas and associated infrastructure.

The illustrative masterplan for the site is shown in Figure NTS2.

ENVIRONMENTAL IMPACT ASSESSMENT

Environmental Impact Assessment (EIA) is a process for ensuring that the likely significant

effects of a new development on its surrounding environment are fully described and taken

into account by the local planning authority before a development is allowed to proceed.

EIA should be focussed on the likely significant environmental effects of a proposed

development. It is not intended to be a process to address all of the possible environmental

effects of a development.

The proposed development is not a Schedule 1 development, for which EIA would be

mandatory. It is however a Schedule 2 development, for which EIA is required where the

development is “likely to have significant effects on the environment by virtue of factors such

as its nature, size or location”. Given the size of the site and its history, the applicant has

voluntarily submitted this Environmental Statement (ES) to LB Bexley in conjunction with the

proposed planning application.

THE PURPOSE OF THIS DOCUMENT

This document forms Volume 1 of the ES. It is the Non-technical Summary of the ES that has

been prepared by Anderson and their consultant team. Its purpose is to present the findings

of the EIA process – as presented in Volume 2 (Main Volume) and Volume 3 (Technical

Appendices) of the ES – in a way that makes it readily understandable to non-specialists.

THE STRUCTURE OF THE OTHER VOLUMES OF THE ES

Volume 2 is the main volume of the ES. It contains the following chapters:

Chapter 1 – Introduction

Chapter 2 – EIA Methodology

Chapter 3 – Site Description & Development Proposals

Chapter 4 – Alternatives Considered & Design Evolution

Chapter 5 – Construction Strategy & CEMP

Chapter 6 – Socio-economic Effects

1.0 Introduction

SITE

SITE BOUNDARY

KEY

Registered Office:

32 Beehive Lane, Welwyn Garden City,

Hertfordshire, AL7 4BQ

Design Office:

19 Walsworth Road, Hitchin, Herts, SG4 9SP

Tel 01462 615433 Fax 01462 615425

Email [email protected] www.stomor.com

Revisions

Rev

Description

Date Drawn Checked

Project

Drawing Description

Scale Date

Drawn By Checked By

Client

Notes

Do not scale off the drawing.

Only written dimensions should be taken.

Any discrepancies or errors should be brought

to the attention of the engineer immediately.

Architect

Drawing

Number

Land at Fraser Road, Erith, Bexley

Site Location Plan

ST-2290-93

1:10000@A316/10/14 YK NJM

Figure NTS1

Figure NTS2

CBRE | ERITH QUARRY

1.0 Introduction

Page

3

INTR

ODUC

TION

Chapter 7 – Ecology

Chapter 8 – Ground Conditions

Chapter 9 – Landscape & Visual Effects

Chapter 10 – Transportation

Chapter 11 – Cumulative Effects

Chapter 12 – Summary & Conclusions

The technical chapters contained in Volume 2 (Chapters 6 – 10) relate to those

environmental topics on which it was considered the proposed development had the

potential to result in significant environmental effects.

This was established through the submission of a ‘request for a scoping opinion’ to LB

Bexley in April 2014. In considering the content, or scope, of the ES, LB Bexley sought views

from a range of stakeholders, including internal departments, the Environment Agency and

Natural England.

Volume 3 of the ES comprises the technical appendices, including the technical reports that

have informed the chapters in Volume 2, as well as those on environmental topics on which

the proposed development was considered unlikely to have significant environmental effects

(and did not warrant a stand-alone chapter within Volume 2). These include:

Appendix 1.1 – Request for a Scoping Opinion

Appendix 2.1 – Scoping Opinion and Consultation Responses

Appendix 3.1 – Services & Utilities Statement

Appendix 4.1 – Air Quality Assessment

Appendix 5.1 – Baseline Noise Survey

Appendix 6.1 – Flood Risk Assessment

Appendix 7.1 – SINC Consultation Response

Appendix 7.2 – Interim Ecology Report

Appendix 7.3 – Invertebrate Survey

Appendix 7.4 – Ecological Management Plan

Appendix 8.1 – Phase 1 Environmental Assessment

Appendix 9.1 – Landscape and Visual Impact Assessment

Appendix 10.1 – Transport Assessment

Appendix 10.2 – Travel Plans

HOW TO COMMENT

The full ES and planning application can be inspected at the following location:

The London Borough of Bexley

Civic Office

2 Watling Street

Bexleyheath

CBRE | ERITH QUARRY

1.0 Introduction

Page

4

INTR

ODUC

TION

Kent

DA6 7AT

A copy of the ES and other planning application documents will also be available to view

and download on LB Bexley’s website (www.bexley.gov.uk). A link to these documents is

also provided via Erith Quarry’s dedicated website (www.erithquarry.co.uk).

Comments on the planning application and ES should be addressed to Mr Steve Bell at the

above address.

Copies of the full document can be obtained at a cost to reflect printing and distribution by

contacting CBRE Planning on 020 7182 2000.

http://www.bexley.gov.uk/

http://www.erithquarry.co.uk/

CBRE | ERITH QUARRY

2.0 What is Being Proposed

Page

5

WHA

T IS

BEIN

G PR

OPOS

ED

THE SCHEME

The description of the development as it appears on the planning application is as follows:

“Full planning permission for the provision of new site accesses and access roads, a 3-Form

Entry Primary School (4,190 sq m), 86 residential dwellings (Use Class C3) and an

ecology/grassland area in Phase 1 with outline planning permission in 3 subsequent phases

(with all matters reserved except for access) for up to a maximum of 540 sq m GEA of

ancillary non-residential floorspace (Use Classes A1, A2, A3, B1 and / or D1) and up to a

further 514 residential dwellings together with associated works including informal and

formal open space; pedestrian and cyclist infrastructure; car and cycle parking.”

The following paragraphs describe the various elements of the scheme. These sections are

split between the detailed application (Phase 1) and the outline application (Phase 2-4).

The proposed phases of the scheme are shown on the phasing plan shown in Figure NTS3.

A detailed planning application means full details of the proposals are submitted for

consideration by the local planning authority, whereas an outline application looks to

obtain ‘in principle’ agreement for development within set parameters.

The scheme is described in further detail in Chapter 3 of Volume 2.

Phase 1 (detailed application)

Phase 1 comprises the construction of site accesses from Fraser Road and Carlton Road, a

3-form entry primary school and 86 residential units in the north east of the site, a 3.25

hectare ecology area in the north-west of the site, open space and associated infrastructure.

The main vehicular access point will be provided from Fraser Road in the northeast of the

site. The proposed access takes the form of a roundabout. A second vehicular access will be

provided off Carlton Road, which will provide an emergency access route through to the

main body of the site and will directly serve no more than 50 residential units. This junction

will take the form of a priority controlled junction.

The three form entry primary school, which will have a floorspace of 4,190 sq. metres, is

proposed in the north of the site. When fully operational, the school will offer 21 class

rooms with capacity for 630 pupils between the ages of 4 and 11. The building will include

an activity studio, drama studio, LRC and specialist teaching spaces for science, art and

ICT, while a variety of sports facilities will also be provided at the site.

86 Residential units, ranging from 2 bedroom maisonettes to 4 bedroom houses, are

proposed for Phase 1 of the scheme. The breakdown of units to be provided is shown in

Table NTS1.

Table NTS1

Schedule of units within Phase 1: breakdown by type and number

UNIT TYPE NUMBER % SPLIT

2 bedroom maisonette 32 37.2

3 bedroom house 40 46.5


TOTAL 86

Source: Studio Egret West


Figure NTS3

CBRE | ERITH QUARRY


Page

6

WHA

T IS

BEIN

G PR

OPOS

ED

A 3.25 hectare ecology area is provided in the north-west portion of the site. This area has

been shown through surveys to be the most valuable part of the site in ecological terms.

This area will not be subject to development other than the erection of raised

footways/cycleways and the construction of sustainable drainage features, including wet

ponds and swales. These will act to manage surface water and to promote biodiversity.

Phases 2 – 4 (outline application)

Phase 2 – 4 comprise the construction of up to 514 residential units, 540 sq. metres of non-

residential/community floorspace, open space and associated infrastructure.

In addition to the vehicular access points at Fraser Road and Carlton Road, and the

pedestrian and cycle access from Riverdale Road, pedestrian and cycle access will also be

provided from Birch Walk.

Phase 2-4 includes construction of up to 514 residential units. As such, up to 600 units will

be constructed across the scheme. The preferred residential unit mix for the entire scheme

(including Phase 1) is shown in Table NTS2.

Table NTS2

Schedule of units across all phases: breakdown by type and number

UNIT TYPE NUMBER % SPLIT

1 bedroom flat (assisted) 24 4

1 bedroom flat 21 3.5

2 bedroom flat 60 10

2 bedroom maisonette 120 20

3 bedroom house 270 45


TOTAL 600

Source: Studio Egret West

Levels of affordable housing within each phase of the development will be determined

through a Viability Assessment. LB Bexley targets 35% affordable housing provision within

new developments.

It is proposed that the scheme will provide up to 540 sq. metres of non-residential/

community floorspace. Permission is being sought for a flexible range of land uses,

including shops (A1 use), financial and professional services (A2 use), restaurants and cafes

(A3 use), offices (B1a use) and non-residential institutions1 (D1 use), which across use

classes A1, A2, A3, B1(a) and/or D1. The end use of this floorspace will depend on future

demand.

Overall phasing of the development

The anticipated programme for the construction works is set out in Table NTS3.

1 These include: places of worship, church halls, clinics, health centres, creches, day nurseries,

consulting rooms, museums, public halls, libraries, art galleries, exhibition halls, law courts,

non-residential education and training centres.

CBRE | ERITH QUARRY


Page

7

WHA

T IS

BEIN

G PR

OPOS

ED

Table NTS3

Indicative programme of construction works

PHASE CONTENT START DATE FINISH DATE DURATION

Site Preparation Enabling works, service diversions and infrastructure

May 2015 May 2016 52 weeks

Construction (Phase 1) School and 86 dwellings November 2015 December 2017 104 weeks

Construction (Phases 2 ) Apartment blocks & 33

dwellings

November 2016 December 2018 104 weeks

Construction (Phases 3 ) Homes of maisonettes,

terraces, semi-detached

& phase 2 school

classroom fit out


Construction (Phases 4 ) Homes of maisonettes,

terraces, semi-detached

& phase 3 school

classroom fit out


May 2015 December 2021 468 weeks

Source: Anderson Design & Build

Further detail on construction is contained within Chapter 5 of Volume 2.

PUBLIC CONSULTATION

Three public consultation events were held by the applicant in advance of the planning

application being submitted. The events were held at Trinity School, Erith Road, DA17 6HT

on:

Saturday 19 July 2014;

Tuesday 22 July 2014; and

Saturday 18 October 2014.

The purpose of these events was to receive feedback from the local community on the

proposals. The consultation process is discussed in more detail within the Statement of

Community Involvement submitted alongside the planning application.

ALTERNATIVES CONSIDERED

This section outlines the main alternatives that were considered by the applicant when

progressing the layout and design of the scheme. Further detail of the alternatives is

presented in Chapter 4 of Volume 2.

Number of residential units

Given its size, the site is capable of supplying more than the 600 units for which planning

consent is being sought. Initially, the applicant considered a variety of different options in

terms of unit numbers and potential mixes, including the provision of up to 700 residential

units on the site. However, when engaging with LB Bexley and the local community, it

became clear that there were concerns that 700 units would represent an overdevelopment

of the site and could also put pressure on ecological conditions within the site boundary.

CBRE | ERITH QUARRY


Page

8

WHA

T IS

BEIN

G PR

OPOS

ED

Schemes comprising fewer than 600 units were also considered; though these did not

provide sufficient value for the development of the site to bring forward some of the

community benefits now being proposed, such as the 3 form primary school. The applicant

therefore took the decision to proceed on the basis of up to 600 residential units.

Location of the apartment building

Under earlier iterations of the masterplan, one of the apartment buildings (within Phase 2)

was positioned approximately 20 metres from existing properties along Athol Road.

Following consultation with the residents, Anderson took the decision to reposition the

apartment building closest to Athol Road to increase the distance between new and existing

buildings. This change also had the benefit of increasing the size of the ecology area from

3.1 hectares to 3.25 hectares.

Community facilities

During the early stages of the pre-application consultation with LB Bexley, discussions were

held over the potential for the scheme to provide a significant community facility for the

borough. Potential options included an assisted living facility; however, research indicated

that demand was not sufficient to make such a facility viable. Demand for primary school

places is high across London and in the north of LB Bexley. The three-form entry primary

school was therefore included as part of the scheme.

Ecological area

Under early versions of the masterplan, development was proposed throughout the site,

with the notable exception of an ecological buffer zone around the periphery.

Results from ecological survey work carried out subsequently indicated that the site’s

general ecological condition had deteriorated substantially since it was first designated as a

SBG1INC in 1991 and last surveyed in 2004, as a result of ‘benign neglect’ which had

resulted in the spread of Japanese knotweed and encroachment of Brambles. Nevertheless,

the surveys also indicated that the area of grassland in the north west of the site was

relatively species-rich in comparison with the rest of the site and contained a number of the

species for which the SBG1INC was originally designated.

Following consideration of these results and engagement with the Ecology Officer at LB

Bexley, the decision was made to refrain from developing this portion of the site and instead

to retain it in its current state, allowing its ecological value to be preserved and protecting it

from further deterioration through ongoing management.

Other Considerations

A number of other alternatives were also considered, including:

Alternative designs for the main vehicular access junction at Fraser Road – a priority

junction was initially proposed but results from the assessment work indicated that this

junction type would not be capable of managing the volumes of development traffic

anticipated during the peak periods. Results indicated that the best junction type at this

location would be a roundabout and, as such, this has been incorporated into the

design.

Alternative designs for the internal access roads – this has been primarily influenced by

site levels. Due to the significant increase in levels between the point of access on Fraser

Road and the main body of the site, the internal road sweeps along the northern and

CBRE | ERITH QUARRY


Page

9

WHA

T IS

BEIN

G PR

OPOS

ED

eastern boundaries of the site. An access route running directly into the site from Fraser

Road would generate significant depths of cut across the entire site resulting in an

increase in the volume of construction traffic to remove this material from the site.

CBRE | ERITH QUARRY

3.0 Assessment of Environmental Effects

Page

10

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

THE CONTENT OF THE ES

The content (or scope) of the ES was agreed with LB Bexley following the submission of a

‘request for a scoping opinion’ in April 2014. Before returning their scoping opinion, LB

Bexley consulted a number of their internal departments, as well as external organisations

such as the Environment Agency. A summary of the comments is contained in Table NTS4,

along with an indication of where these comments have been addressed within the ES.

Table NTS4

Summary of consultation responses

CONSULTEE COMMENT WHERE ADDRESSED

LB Bexley – Highways The submitted EIA scoping report includes a

methodology for the production of the Transport

Assessment which will support the future planning

application, and confirms that a detailed scope will be

agreed with the Highway Authority and Transport for

London.

ES Volume 2, Chapter 10 – Transportation

ES Volume 3, Appendix 10.1 – Transport

Assessment

LB Bexley – Drainage The scoping document rightly identifies the treatment of

surface water on and off site as a concern and proposed

to address these in the ES. These sections and the Flood

Risk Assessment also proposed will need to, where

sections consider water/flood-related matters, pay due

regard to the Mayor of London and Bexley’s Planning

Policies.

ES Volume 2, Chapter 3 – Site Description &

Development Proposals

ES Volume 2, Chapter 8 – Ground

Conditions

ES Volume 3, Appendix 6.1 – Flood Risk

Assessment

LB Bexley – Contaminated Land The scope of the EIA includes reference to undertaking

appropriate land contamination assessments and is

therefore considered acceptable

ES Volume 2, Chapter 8 – Ground

Conditions

ES Volume 3, Appendix 8.1 – Desk Study

Report

Environment Agency The proposed scope of the EIA is appropriate with

regards to flood risk management. The use of

sustainable drainage features will be expected and these

should incorporate water quality, habitat and amenity

benefits in addition to attenuation

ES Volume 2, Chapter 3 – Site Description &

Development Proposals

ES Volume 2, Chapter 7 – Ecology &

Biodiversity


Assessment

We note the contents of the ‘Ground Conditions’ section

and can confirm that this represents an acceptable scope

of works

ES Volume 2, Chapter 8 - Ground Conditions

ES Volume 3, Appendix 8.1 – Desk Study

Report

Natural England We would expect the final Environmental Statement to

include all necessary information as outlined in Schedule

4 of the Town & Country Planning (Environmental

Impact Assessment) Regulations 2011.

ES Volume 2, Chapter 1 – Introduction,

Tables 1.2 & 1.3

Buglife Due to the site’s history of previous disturbance and site

vegetation description with the scoping report, the

Habitat of Principle Importance, Open Mosaic Habitat on

Previously Development Land (OMHPDL) may be

present. The site should be assessed against the Defra

funded standard assessment guidelines for OMHPDL1.

ES Volume 2, Chapter 7 – Ecology &

Biodiversity

ES Volume 3, Appendix 7.2 – Interim

Ecology Report

The invertebrate survey scheduled for 3 visits in mid-July ES Volume 2, Chapter 7 – Ecology & Nature


CBRE | ERITH QUARRY


Page

11

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

CONSULTEE COMMENT WHERE ADDRESSED

will not be an adequate assessment of the site2. Under

Natural England guidelines, invertebrate surveys should

be carried out over 3 to 7 days of field work, depending

upon the size of the site, covering the period March to

October. Buglife recommends that an invertebrate survey

following the Natural England guidelines should be

carried out so that the biodiversity impacts of the

development can be fully assessed.

Conservation

ES Volume 3, Appendix 7.3 – Invertebrate

Survey Report

Thames Water We would recommend that any EIA report should be

expanded to consider the following:

The development’s demand for water

supply and network infrastructure both on

and off site and can it be met;

ES Volume 3, Appendix 3.1 – Utilities and

Services Strategy

The development’s demand for sewage

treatment and network infrastructure both

on and off site and can it be met;

ES Volume 3, Appendix 3.1 – Utilities and

Services Strategy

The surface water drainage requirements

and flood risk of the development both on

and off site and can it be met;


Assessment

Any piling methodology and will it

adversely affect neighbouring utility

services;

ES Volume 2, Chapter 5 – Construction

Strategy & CEMP

There are water mains located within the

development site area. The proposed EIA

should include information on how these

water mains will be protected during

construction to ensure potable water

continues to be adequately supplied to the

area

ES Volume 2, Chapter 5 – Construction

Strategy & CEMP

Source: LB Bexley Scoping Opinion (23 June 2014)

KEY RECEPTORS

The following key receptors were identified in the vicinity of the site:

Residents living on roads surrounding the site (Carlton Road, Silver Spring Road,

Riverdale Road, Fraser Road, Athol Road, Thwaite Close, Vicarage Close & Kempton

Close) as well as properties north of the site as far as Erith Road;

Residents living in houses constructed during the early phases of the proposed

development;

Grade II Listed Buildings located within 1 km of the site, including Bexley College,

Parish Church of All Saints, the X-Ray Department (Erith & District Hospital), Christ

Church, Erith Library and Parish Church of St John the Baptist;

2 It should be noted that this is an incorrect interpretation of the survey effort proposed within the

scoping report. Three surveys were proposed – one in May 2014, one in June 2014 and one in

July 2014.

CBRE | ERITH QUARRY


Page

12

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

Erith Quarry Site of Borough Grade I Importance for Nature Conservation (SBG1INC)

located at the site, as well as Abbey Wood Site of Special Scientific Interest (SSSI) and

Lesnes Abbey Woods Local Nature Reserve (LNR);

The Seaford Chalk Formation below the site;

The small vegetated stream located close to the site’s western boundary; and

the River Thames.

ASSESSMENT OF SIGNIFICANCE

Prevailing good practice suggests that environmental impacts should be considered in terms

of the importance, value or sensitivity of receptors and the predicted scale, or magnitude, of

the potential effects. The significance of potential impacts should then be determined

through consideration of respective sensitivity and magnitude.

The assessment of significance within the ES is largely based on the significance matrix

presented in Table NTS5.

Table NTS5

Significance matrix

MAGNITUDE OF

EFFECT

SENSITIVITY OF RECEPTOR

Very High High Medium Low Negligible

Very Large Major Significance Major Significance [3] Moderate

Significance [1]

Large Major Significance [3] Moderate

Significance Minor Significance [2]

Medium [3] Moderate Significant Minor Significance [2] Negligible

Significance

Small Moderate

Significance Minor Significance [2]

Negligible

Significance

Negligible

Significance

Negligible [1] [2] Negligible

Significance

Negligible

Significance

Negligible

Significance

[1] The choice between ‘Moderate Significance’, ‘Minor Significance’ and ’Negligible Significance’ will depend on the specifics of the impact

and will be down to professional judgement and reasoning.

[2] The choice between ‘Minor Significance’ and ‘Negligible Significance’ will depend on the specifics of the impact and will be down to

professional judgement and reasoning.

[3] The choice between ‘Major Significance’ and ‘Moderate Significance’ will depend on the specifics of the impact and will be down to

professional judgement and reasoning.

n.b. ‘Negligible Significance’ includes ‘Neutral’ and ‘No Impact’ assessments.

Where methodologies vary from the use of the above matrix – for example, where they

follow technical guidance from professional institutes, such as the Chartered Institute of

Ecology & Environmental Management – the significance of effect is still described as being

either:

Major;

Moderate;

CBRE | ERITH QUARRY


Page

13

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

Minor; or

Negligible.

Statements are also made as to whether the effects are:

Beneficial or adverse;

Direct or indirect; and

Long-(>15 years), medium-(7-15 years) or short-term (<7 years).

Cumulative effects are also considered within the ES. The dictionary definition is ‘increasing

by one addition after another’ and cumulative impacts can result from individually minor

but collectively significant actions taking place over a period of time. It was agreed with LB

Bexley that four schemes had the potential for cumulative effects alongside the Erith Quarry

proposals. These are listed in Table NTS6.

Table NTS6

Developments with potential for combined effects alongside the Erith Quarry proposals

SITE PROPOSALS STATUS RELEVANCE

Bexley College,

Tower Road, Erith

Demolition of the existing college buildings and the redevelopment of

the site to provide 192 dwellings (91 x 3 bed and 8 x 2 bed houses,

one 4 storey block providing 65 x 2 bed apartments, 26 x 2 bed

duplex units and 2 x 2 bed apartments) together with new access,

associated parking and amenity space.

Application

granted subject

to Section 1063

Agreement

Potential cumulative

environmental effects

during

construction/operation

phase.

Larner Road, Erith Demolition of existing building and construction of between 550 and

622 residential units (Class C3) in two phases. Phase 1 (detailed

planning permission) comprises the construction of 343 residential

units comprising 12 x 2 bed, 107 x 3 bed, 21 x 4 bed houses and 27

x 1 bed, 176 x 2 bed apartments, landscaping and enhancement

works to The Dell, open space provision, public realm works,

landscaping, 304 car spaces, 34 disability car spaces and 483 cycle

spaces together with associated works. Phase 2 (Outline planning

permission) comprises construction of between 207 and 279

residential units, a community facility of up to 150 sq.m (Class D1

and/or D2) and associated works. Approval of details of access for

Phase 2.

Application

granted subject

to Section 106

Agreement



during


phase.

Walnut Tree Depot

Site, Stonewood

Road, Erith

Construction of a three storey college building, together with the

provision of a new pedestrian link, access, car parking (41 spaces)

and landscaping.

Application

granted subject

to Section 106

Agreement



during


phase.

Pirelli Church

Manorway, Erith

Demolition of existing buildings and erection of industrial and

distribution park with a total of 60,263sqm, comprising light

industrial use (Class B1), general industrial use (Class B2) and

warehouse and distribution floorspace (Class B8), amended access

Application

granted subject

to Section 106

Agreement



during


3 Planning obligations under Section 106 of the Town and Country Planning Act 1990 (as amended)

are a mechanism that makes a development proposal acceptable in planning terms, which

would not otherwise be acceptable. They are focused on site-specific mitigation of the impact of

development. S106 agreements are often referred to as 'developer contributions'.

CBRE | ERITH QUARRY


Page

14

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

arrangements, landscaping, car parking and servicing areas.

(Application for an extension of the time limit for implementation on

the previously approved planning reference 05/01201/FULM).

phase.

Further detail on the EIA Methodology is presented in Chapter 2 of Volume 2.

The remainder of this section outlines the assessment of the main environmental effects that

has been undertaken. Topics are presented in the order in which they appear within Volume

2 of the ES.

Section 4 of this report contains a table of that summarises the significance of the residual

effects of the proposed development (i.e. those effects that remain after the implementation

of the mitigation measures detailed within the ES).

SOCIO-ECONOMICS

The assessment of socio-economic effects has been undertaken by Zeta Economics and is


The scheme has been assessed in terms of the likely potential impact on socio-economic

conditions. The assessment considers:

Social and demographic effects. These include likely changes in the local population

and the effect of the development on social and community infrastructure, including

primary and secondary education, and health facilities.

Economic effects. These include likely employment generation and likely expenditure by

new residents.

Construction phase

Job creation

Based on a conservative estimate of construction costs, which is based on industry estimates

for the size of the development, but which is likely to underestimate costs associated with

building on a former quarry and landfill site:

gross direct employment during the construction phase is estimated to be 605 man-

years, or 60.5 full time equivalent (FTE) jobs;

gross indirect employment, which is that generated through the supply chain is

estimated to be 484 man-years (48.4 FTE jobs); and

gross induced employment, which is that as a result of additional spending by

construction workers, is estimated to be 236 man-years (23.6 FTE jobs)

net additional impacts are estimated to result in 395 man-years (39.5 FTE jobs).

Community disturbance

As with construction works on all schemes of this nature, side effects, such as noise and

construction traffic, have the potential to disturb local residents. The level of community

disturbance from the construction site will also be dependent on the perceptions and levels

of tolerance of existing residents.

Impacts will be minimised by undertaking works in accordance with an agreed Construction

Environmental Management Plan (CEMP). Measures to be included in the CEMP are

outlined in Chapter 5 of Volume 2. They include measures in relation to:

CBRE | ERITH QUARRY


Page

15

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

air quality (including dust generation);

noise and vibration;

contamination; and

construction traffic.

Post-construction phase

Population

Based on the latest Census data, the likely number of future residents across a total of up to

600 residential units is approximately 1,453. Table NTS7 shows the estimated child yield

based on two methods:

Census data from 2011; and

LB Bexley’s Planning Obligations Guidance Supplementary Planning Document.

Table NTS7

School age pupil estimates

SCHOOL AGE GROUP CENSUS BASED ESTIMATE SPD RULE BASED ESTIMATE

Primary (aged 4-11) 130 136

Secondary (aged 12-16) 89 97

Post-16 (aged 17-19) 54 39

Source: Zeta Economics

Employment

Based on pupil-teacher ratios for primary and secondary schools in Bexley, the primary

school at Erith Quarry site will create approximately 30-33 FTE teaching jobs when fully

operational.

In addition, the development will also include 540 sq.m. of non-residential floorspace.

Based on the highest and lowest employment densities for the use classes applied for (A1

‘shops’ and B1 ‘business uses’, respectively) the development is likely to generate between

32 and 54 direct FTE jobs and between 42 and 90 FTE jobs. Of these jobs, between 15 and

32 are estimated to be completely new (i.e. net) FTE jobs.

Effects from local spend

The expenditure by households within the new development has been modelled using the

UK Household Expenditure 2011 data for London. Based on this, it is expected that the total

household expenditure may amount to £21.13 million annually in total for all households

(this includes all expenditure items). Expenditure on various consumer items is estimated at

£15.15 million annually.

Overall, the expenditure by all residents will create an estimated 170 direct, indirect and

induced FTE jobs in the UK economy. Up to 27.4 FTE jobs are expected to be completely

new to the economy of LB Bexley.

CBRE | ERITH QUARRY


Page

16

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

Education facilities

The three-form entry primary school will provide places for an estimated 620 children when

fully operational, based on an average class size of 30 children from Reception to Year 6. It

is proposed that the primary school will be brought forward in four stages:

September 2017 – 3 classrooms




Healthcare facilities

A total of between 0.6 – 1 (FTE) GPs and 0.3-0.5 FTE dentists are estimated to be required

in order meet the needs of the additional residents of the proposed scheme.

17 of the 18 GP and dental practices within 3km of the site were accepting NHS patients in

October 2014. There is therefore considered to be additional capacity within existing

healthcare facilities, though the exact extent of this capacity is uncertain.

The applicant has entered into early discussions with the local NHS Trust to examine the

possibility of a small healthcare facility (D1 use) to operate within the 540 sq.m. non-

residential floorspace. D1 use is listed within the description of development for which

permission is being sought.

Open space provision

Based on the illustrative masterplan, the development will provide 22,385m2 of open space

above what is required in LB Bexley’s Open Space Strategy (2008). This is equivalent to a

48% overprovision.

Community facilities

Approximate population thresholds for community centres are one per 7,000 to 15,000

residents. Therefore, it is anticipated that the proposed development will not result in a

sufficient increase in demand in order to warrant additional community centre capacity.

ECOLOGY & BIODIVERSITY

The assessment of ecological effects has been undertaken by Ecology Solutions and is


The scheme has been assessed in terms of the likely potential impact related to ecological

conditions at the site and in the surrounding area. A number of ecological surveys were

undertaken to inform the assessment of ecological effects, including:

Habitat survey;

Arboricultural survey;

Bat surveys;

Badger survey;

Reptile surveys;

Breeding birds surveys; and

CBRE | ERITH QUARRY


Page

17

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

Invertebrates surveys.

Habitats

The following main habitat / vegetation types are present within the site:

Scrub;

Rough Grassland and Ruderal;

Woodland belts and scattered trees;

Stream;

Hardstanding; and

Bare ground/rubble.

The majority of the site consists of extensive areas of Bramble scrub, particularly to the east

of the site, large areas of which have become inaccessible. Where Bramble is not dominant

a range of other scrub species are present. Significant areas of rough grassland and

ruderal vegetation are still present across the site, although there is evidence that these

areas are declining as a results of scrub encroachment. A moderate diversity of plant

species are present; however, no areas of significant species richness were identified. The

more species-rich, diverse areas are primarily to the north and west of the site.

Wooded areas are present along much of the northern, eastern and southern site

boundaries, whilst a number of scattered, generally semi-mature trees are present within

the scrub and grassland habitats towards the centre of the site. Japanese Knotweed, an

invasive species, is also present at the site.

A small stream is present to the west of the site, which is overshaded by woodland along

much of its extent. Areas of hardstanding, in the form of dilapidated tarmac track, are

present along the southern and south-western areas of the site, while a small number of

rubble/soil piles are present within the grassland/scrub mosaic.

The site forms the majority of the non-statutory site of Erith Quarry Site of Borough

Importance for Nature Conservation (SBG1INC), although a section of this designated site

lies to the east. Results from ecological surveys indicate that the site’s general ecological

condition has deteriorated substantially since it was first designated as a SBG1INC in 1991,

and last surveyed by the London Wildlife Trust (LWT) on behalf of LB Bexley in 2004, with

encroachment of bramble scrub highlighted as the key reason for this loss of species

biodiversity. The results, however, indicate that the area of predominantly rough grassland

in the north west of the site is relatively species rich in comparison with the rest of the site

and contain a number of the species for which the SBG1INC was originally designated.

Following consideration of these results and consultation with the biodiversity officer at LB

Bexley, the decision was made to refrain from developing this portion of the site and instead

to retain it in its current state, managed with a ‘hands-off’ approach by a designated

management company, protecting it from further encroachment from bramble scrub and

allowing its ecological value to be conserved. It is also considered that the protection and

management of this area will allow the SBG1INC designation to be retained in this part of

the site.

To ensure that the wooded belt that lines much of the periphery of the site is retained under

the proposals, a minimum 10 metre woodland buffer will be ensured to the main area of

built development and internal road network. A number of trees will require removal to

CBRE | ERITH QUARRY


Page

18

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

facilitate the works, including 7 located at the location of the southern access at Carlton

Road. The majority are, however, outside of the agreed buffer zone and have limited

ecological and local amenity value.

New native tree planting, as part of a long-term management regime, will be undertaken to

produce a more contiguous area of woodland.

Species

No evidence of Badger activity in the form of any setts, latrines, footprints, well used

footpaths or foraging signs was recorded within or immediately adjacent to the site. There

are no ponds present within the site, whilst the flowing nature of the stream present to the

west of the site makes it unsuitable to support breeding amphibians. As such, badgers and

amphibian species are not considered to be present at the site.

Generally low levels of bat activity have been recorded at the site. Activity was found to be

mostly limited to along the wooded belt along the site periphery. No direct evidence of bat

roosts was identified. The habitats of greatest value to bats at the site (i.e. the woodland

belt) will be retained under the proposals. The lighting scheme will be designed to minimise

impacts on bats in proximity to the site, while a total of 20 bat boxes will be placed on

suitable trees/buildings within the site in order to provide roosting opportunities.

The breeding bird surveys indicate that the site is utilised by a range of bird species for

breeding and foraging purposes. Of the 29 species recorded during the breeding bird

survey, 16 were breeding or probably breeding within the site, and three were possibly

breeding (i.e. habitat suitable to support the species is present). The remaining ten species

were either breeding in adjacent areas, recorded only as migrants or flying over the site, or

represented by non-breeding individuals. Some areas of suitable habitat will be lost for

some of these species, however it is considered that the enhancement measures to the

retained habitats at the site will reduce this impact. A total of 60 bird nesting boxes of a

variety of designs will be provided across the site within areas of new and retained

woodland, which will provide further nesting opportunities for a range of bird species.

Surveys recorded a total of 375 terrestrial invertebrate species at the site, identifying that a

range of species utilise the habitats present within the site, including a number of

noteworthy species. Although some habitats at the site that support invertebrates will be lost,

the habitats identified as being of highest value to invertebrates will be retained within the

dedicated ecology area. The ecological management regime will include all retained

habitats, as well as proposed habitats within the site (e.g. wet ponds), which will ensure that

the extent and quality of these habitats is retained and enhanced in the long-term,

promoting enhancements to many invertebrate species. The provision of specific

invertebrate plateaus within an ecology corridor connecting to the retained ecology area

will further mitigate for an impacts to invertebrates.

Surveys recorded reptiles to be distributed across the site, although presence was limited to

within areas of grassland and ruderal. A relatively higher number of reptiles were recorded

in the north-west of the site, where more extensive areas of suitable habitat are present. In

light of the need to commence the removal of Japanese Knotweed from the site, a reptile

mitigation strategy was initiated in July 2014 such that the existing reptile population could

be fully safeguarded during these works. This mitigation strategy incorporated the use of a

translocation exercise, with reptiles being moved to a dedicated holding area, measuring 1

hectare, in the north-west of the site. The reptile translocation exercise on site was

concluded in early November 2014. It is now considered that reptiles are only likely to be

present within the holding area in the north-west of the site. They will be released when

CBRE | ERITH QUARRY


Page

19

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

conditions are deemed safe for them to be returned to the environment, or should planning

permission not be granted.

GROUND CONDITIONS

The assessment of ground conditions has been undertaken by GB Card and Partners and is


The scheme has been assessed in terms of the likely potential impact related to ground

conditions at the site. The assessment has been based on both desk study and previous site

investigation data (undertaken by previous owners).

The data sources utilised include the following:

Historic maps;

Geological records;

Information held on environmental registers; and

Previous technical reports.

Available historical records indicate that the majority of the site was quarried for sand and

gravel from the late 1800’s until at least 1960’s and possibly until 1970’s. The quarry was

subsequently filled with mixture of inert and commercial wastes, construction and

demolition wastes and industrial non-hazardous wastes. Records suggest that the filling of

the site had ceased by 1980. The northern part of the site did not form part of the quarry

and was occupied by a garage/petrol station from the 1950s until 2004, when it was

decommissioned. This area of the site was remediated between 2008 and 2009/2010 by

the previous site owners.

Existing data indicates that the ground conditions beneath the site comprise a thin layer of

topsoil over waste deposits. The maximum thickness of the waste deposits has been

reported to be in excess of 30m. These deposits are underlain by sandstone bedrock across

the majority of the site, which itself is underlain by chalk deposits. The sandstone bedrock

underlying the site is classed as a Secondary A aquifer by the Environment Agency, while

the underlying Chalk is classed as a Principal aquifer. Principle aquifers are layers of rock

or soil that have high permeability, meaning they usually provide a high level of water

storage. Secondary A aquifers have some permeability but provide a lower level of water

storage.

Existing investigation data for the site indicates the presence of elevated concentrations of a

number of contaminants within the waste deposits. Although the data is limited, elevated

levels of some heavy metals have also been reported in the overlying topsoil. Analysis

undertaken to date also indicates that there are elevated concentrations of a range of

contaminants in groundwater below the site. Monitoring data indicates that gas

concentrations at the site are generally low.

Ground contamination will only pose a risk to receptors – such as future site residents and

aquifers beneath the site – if there is a pollution pathway between the source of the

contamination and those receptors.

Appropriate personal protective equipment and safe working practices will be implemented

to protect workers and neighbours from any ground related hazards during construction.

Should contamination be encountered during construction works, soils will be treated.

Treated soils will be re-used on the site wherever possible.

CBRE | ERITH QUARRY


Page

20

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

In order to protect future site users from potential contamination at the site, an engineered

layer of clean soil will be provided in all soft landscaped areas. This will be constructed to

ensure that all requirements are met in terms of human health protection, gas protection,

plant growth and drainage. In hard landscaped parts of the site (i.e. beneath buildings,

roads and pavements), the concrete basements and roads etc. will serve as a capping layer.

This will extend up to the retained ecology area, which will remain in its current condition in

order to maintain its ecological value. Public access to this area will be via a network of

raised boardwalks to prevent direct contact with the ground below.

Further site investigations have recently been undertaken by Anderson Group. The scope of

these has been agreed with both LB Bexley and the Environment Agency. These results will

be submitted to the Council in due course and, together with the results of previous

investigations, will inform the proposed remediation strategy for the site. This will ensure

that the site is ‘suitable for its intended use’.

LANDSCAPE AND VISUAL EFFECTS

The assessment of landscape and visual effects has been undertaken by LandscapeVisual

and is presented in Chapter 9 of Volume 2.

The likely significant effects of the development on landscape features, landscape character,

and visual amenity have been assessed.

The site forms the eastern edge of a minor valley which runs in a south-westerly to north-

easterly direction towards the River Thames. From the site, there are open views to riverside

industry and housing, particularly to the north. The surrounding townscape is a mix of

Victorian and Edwardian, inter-war and 1970s suburban housing with extensive industrial

and commercial areas to the north and east.

Viewpoints assessed are shown in Table NTS8:

Table NTS8:

Viewpoints assessed

NO. NAME

APPROXIMATE OS

GRID REFERENCE RATIONALE FOR VIEWPOINT SELECTION

1. Kempton Close/Victoria Close 550319 177775 Residential street

2. Junction Fraser Road/Bexley Road 551141 177996 Principal road near site

3. Carlton Road Entrance 550059 177754 Residential street/proposed site entrance

4. Riverdale Road Entrance 549997 178128 Residential street/proposed site entrance

5. Top of Holmhurst Road 549910 178459 Residential street with elevated view over site

6. Holly Hill 549715 178212 Open space with elevated view over site

7. A206 main site entrance 550452 178305 Main road/commercial street/proposed site entrance

8. Erith Road near Trinity School 550186 178447 Main road with elevated view over site

9. Athol Road 550337 178265 Residential street

The proposed development would bring about large-scale change to much of the quarry

site, transforming approximately 15 hectares into planned mixed-use development. The

proposed development would retain some of the features currently on the site, including the

CBRE | ERITH QUARRY


Page

21

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

grassland at the north-western end. This will form part of the 3.25 hectare ecology area.

The development largely retains and reinforces the existing woodland boundaries.

A development of the scale proposed will always have defined landscape and visual effects.

While short-term effects should be afforded due consideration, it is particularly the long-

term effects which are important.

The proposed development would be visible from nearby residential areas. Many of these

areas already contain views of housing or industry. The proposed development would not

contain features which are not already present in the surrounding suburbs. The change in

views would nevertheless be noticeable, particularly for residents of streets adjoining the site

and on the valley-side to the north.

The development would open access through the site and to open spaces within the site,

including the village green and ‘play spine’. The development would improve the

permeability for the surrounding suburbs for those on foot and cycle. The development is

considered to represent an increase in the density of development in the wider area, but

also an increase in the quality of planned development.

TRANSPORT

The assessment of transport has been undertaken by Stomor Ltd. and is presented in

Chapter 10 of Volume 2.

The assessment evaluates the likely significant effects of the proposed development in

relation to transport matters. It considers the proposed development impact with regard to

the following:

vehicular traffic;

pedestrians;

cyclists;

public transport; and

car parking.

The area surrounding the site is heavily urbanised. The largest roads in the vicinity are the

A220 (Bexley Road), the A206 (Fraser Road/Erith Road) and the A2016 (Bronze Age Way).

A pair of bus stops are located on Fraser Road north of the site and a further pair are

located on Bexley Road south-east of the site. A ‘Hail and Ride’ bus service operates along

Carlton Road, south of the site where passengers can be picked up or dropped off upon

request at any safe location. Bus route B12 provides a regular service between Erith and

Bexleyheath. Erith station is approximately 1km by road to the east of the site boundary with

Fraser Road.

The existing road network generally operates within capacity, but with selected junctions

experiencing delay during peak periods. Of the 17 junctions assessed, it was identified that

during peak traffic periods, nine junctions are currently operating with spare capacity, while

two junctions are operating close to capacity and 6 junctions are operating over capacity.

Construction phase

Construction vehicles are proposed to be routed to and from the site along Fraser Road and

Bexley Road to the Erith Roundabout to pick up the more strategic routes of Bronze Age

Way and Queens Road. The maximum number of Heavy Good Vehicle (HGV) movements

CBRE | ERITH QUARRY


Page

22

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

during the construction phase is anticipated to be 80 per day. An increase in HGV

movements of this magnitude is not anticipated to significantly affect background conditions

on the local road network. In addition, a range of mitigation measures will be implemented

to ensure that any impacts are further kept to a minimum. These will include the following:

Designation of suitable highway routes, avoiding minor roads and agreeing these with

the Local Planning Authority;

Minimising the need to import or export soil to reduce the amount of lorry movements;

Design of haul routes to avoid impact on existing and adjacent land uses;

Control of vehicle speeds; and

Wheel washing for all HGVs leaving site.

Operation

Off-site works to improve junction capacity will be undertaken for local junctions where the

effects of the increase in traffic are considered likely to result in driver delay. The works have

been designed to accommodate not only traffic from the Erith Quarry site once completed,

but also background traffic increases up to 2022 and traffic associated with the

redevelopment of Bexley College. Works will include the following:

Conversion of the A206 Erith Road / Brook Street priority tee junction to a mini

roundabout with some localised kerb realignment;

Enlargement of the A206 Fraser Road / A220 Bexley Road roundabout; and

Widening of the Bexley Road western approach to the Walnut Tree Road / Bexley Road

/ Queens Road (A206) / Bexley Road (A220) / Bronze Age Way (A2016) roundabout.

Additional junction improvement works may also be undertaken at four other junctions. The

extent of the highways improvements required and the timescales for implementation will be

established through consultation with LB Bexley. The proposed highway improvement works

will also provide improved pedestrian safety improvements in the area.

In order to promote non-car use, footway / cycle links will be provided within the site,

linking to adjacent footway systems and public transport links near to the site.

OTHER TOPICS

Air Quality

ACCON UK Ltd. has carried out an air quality assessment for the scheme, which is

presented in Appendix 4.1 of Volume 3.

The assessment considers overall levels of key air pollutants at the proposed development

site and at existing locations within close proximity. It covers the effects on local air quality

from the combined heat and power (CHP) unit, which is proposed to help address the

energy demands of the apartment buildings within Phase 2, and vehicle movements

associated with the scheme during the construction and operation phase.

The report concludes that impacts during the construction phase will range from minor to

negligible by undertaking works in accordance with Best Practice, and will be temporary in

nature. Impacts during the operation of the scheme are considered to be negligible, with no

predicted exceedances of National Air Quality Objectives.

CBRE | ERITH QUARRY


Page

23

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

The assessment has also addressed the potential for nitrogen deposition to affect the

retained ecology area. Levels of nitrogen oxides are below the threshold that has been set

to protect vegetation and habitats under the Air Quality Strategy for England, Scotland,

Wales and Northern Ireland.

Noise

A noise assessment of the proposed development has been undertaken by Sharps Redmore.

This is included as Appendix 5.1 of Volume 3.

The assessment considers the development in relation to the existing noise environment,

particularly at noise‐sensitive locations, such as the proposed school site, and residential

units that will be in close proximity to existing roads.

The assessment was informed by noise surveys at the site and subsequent calculations. The

report concludes that the noise environment is such that the site can be developed in a way

which provides an acceptable noise climate for future residents and students, both in terms

of interior and exterior noise levels, in dwellings and teaching/learning spaces. Measures to

achieve this include the use of high specification double-glazing in certain areas and

limiting noise associated with new mechanical and electrical plant at source.

Flood Risk and Drainage

Stomor Ltd. has prepared a Flood Risk Assessment (FRA) and drainage strategy in relation

to the proposed scheme, which is provided in Appendix 6.1 of Volume 3.

The design sets out measures to ensure that the site would not flood, or allow for run-off of

water into neighbours’ properties. The drainage system proposed will have the capacity to

accommodate a 1 in 100 year storm event, plus 30% to make allowance for future climate

change, as required by the Environment Agency.

Key features of the proposed SuDS scheme are:

Rain gardens/planters are to be provided, where appropriate, to provide a form of

source control. Overflows will be required for higher intensity storm events.

Porous paving to be provided, where appropriate, to control runoff at source and treat

surface water runoff within the site.

Provision of a swale/ditch to convey roof runoff between the proposed apartments and

wet pond areas.

Provision of storage pipes and cellular tanks under the internal road network and

parking areas, where appropriate, to provide storage for the 1 in 30 and 1 in 100 year

+ 30% Climate Change storm events.

Wet ponds to provide storage for the 1 in 30 and 1 in 100 year + 30% Climate

Change storm events, providing ecological features in accordance with the ecological

strategy for the site.

The drainage strategy for the development of the site identifies off-site connections to the

public foul and surface water sewers in Riverdale Road and the public foul water sewer in

Fraser Road. A Sewer Impact Study has been issued by Thames Water. It outlines indicative

improvements which would allow for the development to connect while maintaining the

existing level of service. These are as follows:

CBRE | ERITH QUARRY


Page

24

ASSE

SSM

ENT O

F EN

VIRO

NMEN

TAL E

FFEC

TS

Fraser Road. To provide additional capacity within the existing branch sewer it is

recommended that the existing 150mm diameter sewer from manhole TQ50785105 to

TQ50785205 is upgraded to a 225mm diameter sewer. The approximate length of the

sewer is16m at an average depth of 1.8m.

Fraser Road. A 1500mm diameter offline storage tank sewer is suggested between

existing manholes TQ50787005 and TQ50785104, located within Fraser Road. The

approximate length of the offline tank sewer is 181m at an average depth of

approximately 4.0m. A number of 450mm high level overflow pipes connect the

existing surface water sewer to the off-line tank sewer. Flows discharging from the tank

sewer are restricted through a 300mm diameter continuation pipe.

Holly Hill Road. Reinforcement in Holly Hill Road to comprise the construction of a

bifurcation chamber at manhole TQ49789205 and approximately 184m of 300mm

diameter sewer connecting existing manholes TQ49789205 and TQ50781303 at an

average depth of 2.5m.

Pembroke Road. Network reinforcement is required within Pembroke Road and

comprises the construction of a bifurcation chamber at existing manhole TQ50785508

and approximately 58m of 300mm diameter sewer connecting existing manholes

TQ50785508 and TQ50786607 at an average depth of 2.25m.

Further consultations are underway and the final works package is to be agreed with

Thames Water.

CBRE | ERITH QUARRY

4.0 Summary & Conclusions

Page

25

SUM

MAR

Y &

CONC

LUSI

ONS

SUMMARY OF RESIDUAL EFFECTS

Table NTS8 summarises the residual effects of the proposed development (i.e. those effects

that remain after the implementation of the mitigation measures detailed within the ES).

Table NTS8

Summary of residual effects

TOPIC IMPACT

PRE-MITIGATION

SIGNIFICANCE

MITIGATION

PROPOSED

POST-MITIGATION

SIGNIFICANCE

Socio-economics

Temporary economic

impacts

Total new (net additional)

employment arising from

construction expenditure

Minor beneficial

significance within the

Study Area

Minor to negligible

beneficial significance

within Bexley Borough

No mitigation is required Minor beneficial


Study Area

Minor to negligible



Temporary social

impacts

Community disturbance

during construction phase

Minor to moderate

adverse significance

for nearby properties

Construction Environmental

Management Plan

Minor to negligible

adverse significance for

nearby properties

Long-term social

impacts

Impacts on education

facilities

Moderate to minor


within the Study Area

A three-form entry primary

school will be delivered as

part of the Erith Quarry

development

Major beneficial

significance within Study

Area. Moderate


within Bexley Borough.

Long-term social

impacts

Impacts on health care

facilities

Minor to moderate


within the Study Area

Engagement with Bexley CCG

to increase GP and dentist

care provision towards the

completion of the scheme

Minor to moderate


within the Study Area†

Long-term social

impacts

Impacts on community

facilities

Moderate beneficial


Study Area.

No significance with

respect to community

facilities alone.

Provision of open space

above required standards

Moderate beneficial


Study Area

Long-term economic

impacts

Employment and GVA

arising from expenditure by

new residents and from

new employment space

provision

Moderate beneficial


Study Area

Minor to negligible



No mitigation is required Moderate beneficial


Study Area

Minor to negligible



Ecology & Biodiversity

Designated Sites Loss of existing habitat within Erith Quarry SBG1INC.

Moderate adverse significance at the borough level.

Instigation of a suitable management regime.

Retention of most ecologically valuable habitats.

New habitat creation

Minor positive significance at the Borough level.


CBRE | ERITH QUARRY


Page

26

SUM

MAR

Y &

CONC

LUSI

ONS

including opportunities for notable faunal groups.

Designated Sites Indirect interference through noise / dust deposition and recreational disturbance on nearby non-statutory sites.

Minor adverse significance at the Borough level.

Implementation of best practice construction measures in regard to noise, dust deposition and recreation impacts.

Negligible significance at the Borough level.

Habitats Loss of scrub Minor adverse significance at the site level.

Retention of areas of scrub within ecology area.

New scrub planting adjacent within ecology corridor.

Moderate positive significance at the site level.

Habitats Loss of rough grassland and ruderal

Moderate adverse significance at the Borough level.

Retention of most ecologically diverse areas of grassland within a dedicated ecology area.

Implementation of suitable long-term management in regard to encroachment of scrub and aggressive grassland species.

Provision of new grass and ruderal habitat such as within the ecology corridor and in public open space.

Moderate positive significance at the Borough level.

Habitats Loss of individual trees Minor adverse significance at the Borough level.

Protection of retained trees in accordance with BS 5837:2012.

New native tree planting to produce more contiguous area of woodland.

Long term management regime to remove non-native species and maintain a woodland edge.

Moderate beneficial significance at the Borough level.

Habitats Contamination of stream Negligible at the site level.

Protection of stream corridor with fencing.

Removal of overshading scrub.

Works to the stream channel to provide a series of pools to enhance structural diversity.

Major beneficial significance at the site level.

Bats Potential loss or damage to roosting habitat. Loss of foraging habitat.

Minor adverse significance.

Works impacting any trees that have potential to support roosting bats to be proceeded by detailed surveys to confirm the presence / absence of roosts.

Implementation of a sensitive lighting regime.

Provision of 20 new bat roosting boxes.

Minor positive significance at the international level.

CBRE | ERITH QUARRY


Page

27

SUM

MAR

Y &

CONC

LUSI

ONS

Retention and enhancements of woodland belt and woodland edge.

Birds Loss of foraging and nesting habitat.

Minor adverse significance at the Borough level.

Provision of 60 new bird nesting boxes.

Enhancements to retained habitats such as new woodland planting.

Negligible at site level.

Invertebrates Loss of habitat Major adverse significance at the Borough level.

Ecology area to be managed in perpetuity such that the most valuable invertebrate habitat is retained and enhanced (e.g. scrub and grassland edge habitat and early successional ruderal).

Provision of dedicated invertebrate plateaus in ecology corridor.

Management of woodland to retain deadwood and woodland edge habitat.

Provision of new wet habitats.

Minor positive significance at the Borough level.

Reptiles Loss of habitat Minor adverse significance

Completion of a reptile translocation exercise to include a destructive search exercise.

Implementation of scrub management to retain areas of suitable breeding and foraging habitat.

Provision of new water features to provide optimal foraging habitat for Grass Snake.

Moderate positive significance at the site level.

Ground Conditions

Population Health problems for occupiers due to contact with contaminated soil, asbestos containing materials or soil gases/vapours.

Major Adverse Removal of contamination sources

Provision of engineered capping layer above residual contamination

Installation of gas protection measures

Negligible

Health problems for maintenance workers due to contact with contaminated soil, water, asbestos containing materials or soil gases/vapours.

Minor Adverse Personal Protective Equipment (PPE)

Safe Working Practices

Residual ground conditions to be recorded in the Health & Safety File (maintained under CDM)

Negligible

Resources Reduction in groundwater Moderate Adverse Removal of Negligible

CBRE | ERITH QUARRY


Page

28

SUM

MAR

Y &

CONC

LUSI

ONS

quality due to contaminant migration from landfilled materials to the aquifers

contamination sources

Use of impermeable or low permeability capping

Appropriate siting and design of site drainage

Reduction in surface water quality due to contaminant migration from the aquifers to the River Thames

Minor Adverse Removal of contamination sources

Use of impermeable or low permeability capping

Appropriate siting and design of site drainage

Negligible

Structures

Deterioration of buried structures due to aggressive ground conditions

Minor to Moderate Adverse

Appropriate design of services and buried concrete

Negligible

Vegetation Difficulty establishing healthy vegetation due to phytotoxic ground conditions

Moderate Adverse Provision of capping layer/growth medium

Negligible

Landscape & Visual Effects

Landscape Direct short-term effects

during construction on

landscape features in the

Erith former quarry TCA

Moderate/major

adverse

None Moderate/major adverse

Landscape Indirect effects on

surrounding TCAs during

construction

Moderate adverse None Moderate adverse

Landscape Direct landscape character

effects on the Erith former

quarry TCA

On completion:

Moderate/major

neutral

By design Long-term:

Moderate beneficial

Landscape Indirect landscape

character effects on

surrounding TCAs

On completion:

Minor neutral


Minor beneficial

Visual Visual effects during

construction on residents of

Athol Road, Riverdale

Road, Silver Spring Close,

Carlton Road, Kempton

Close, Holmhurst Road,

Erith Road (near Trinity

School), the Holly Hill

Estate, and Hawthorn Place

Moderate/major

adverse

None Moderate/major adverse

Visual Visual effects on

completion and in the

long-term on residents of

Athol Road, Riverdale

Road, Silver Spring Close,

Carlton Road, Kempton

Close, Holmhurst Road,

Erith Road (near Trinity

On completion:

Moderate/major

adverse

By design Long-term: Moderate

neutral

CBRE | ERITH QUARRY


Page

29

SUM

MAR

Y &

CONC

LUSI

ONS

School), the Holly Hill

Estate, and Hawthorn Place


construction on users of

Birch Walk footpath




long-term on users of Birch

Walk footpath

On completion:

Moderate adverse


Minor neutral


construction on users of

Holly Hill open space




long-term on users of Holly

Hill open space

On completion:

Moderate adverse


Minor neutral


construction on road users

on Erith Road (northern site

entrance)




long-term on road users on

Erith Road (northern site

entrance)

On completion:

Moderate adverse


Minor neutral

Transportation

Pedestrian Amenity A206 Fraser Road Minor adverse More defined pedestrian

routes

Neutral

Driver Delay A206 Erith Rd / Brook St

Junction

Moderate adverse Conversion of junction to

mini-roundabout

Minor beneficial

Driver Delay A206 Fraser Rd / A220

Bexley Rd Junction

Moderate adverse Enlarging roundabout Minor beneficial

Driver Delay Erith Roundabout Moderate adverse Widening on Bexley Rd

approach

Major beneficial

Driver Delay A220 Bexley Rd / Brook St

/ Colyers Ln Junction

Moderate adverse Kerb realignment Neutral

Driver Delay A220 Bexley Rd / Park Cres

/ Carlton Rd Junction

Minor adverse Kerb realignment Minor beneficial

Source: Zeta Economics, Ecology Solutions, LandscapeVisual, GB Card, Stomor

SECURING MITIGATION MEASURES

Table NTS9 summarises the specific measures put forward to mitigate the effects of the

development and also identifies the proposed mechanism for securing them. This will

ensure that, should the development be granted planning consent, it would proceed in line

with the assessments made within the ES that have informed the decision of the local

planning authority.

CBRE | ERITH QUARRY


Page

30

SUM

MAR

Y &

CONC

LUSI

ONS

Table NTS9

Mechanisms for securing mitigation measures

MITIGATION MEASURE MECHANISM

Construction Environmental Management Plan Planning Condition

Ecological Management & Mitigation Plan Planning Condition

Supplementary intrusive investigation Planning Condition

Remediation strategy & validation of works Planning Condition

Provision of Primary School S106 Legal Agreement

Management Company (Highways, Drainage, Landscape & Ecology) S106 Legal Agreement

Upgrades to off-site junctions Planning Conditions, S38 & S278 Legal Agreement

DETERMINING THE PLANNING APPLICATION

In contrast to normal planning applications, which should be decided upon within either 8

or 13 weeks of submission, those applications accompanied by an ES are to be decided

within 16 weeks of submission.

Further details on the deadlines for making comments on the ES and the planning

application as well as the date on which a decision will be made will be available on LB

Bexley’s website (www.bexley.gov.uk).

http://www.bexley.gov.uk/

Date post:	21-May-2020
Category:	Documents
Upload:	others
View:	9 times
Download:	0 times

Environmental Statement - IEMA Quarry Redevelopme… · Environmental Impact Assessment (EIA) ......

Documents