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Proposed Mixed Use Development

Environmental Acoustics Assessment

West Way, Botley, Oxford

On Behalf of Doric

rpsgroup.com


Environmental Acoustics Assessment

West Way, Botley, Oxford

On Behalf of Doric

Prepared by: Peter Barling BSc (Hons) AMIOA

Assistant Acoustic Consultant

Reviewed & checked by:

Susan Hirst BSc (Hons) MIOA

Acoustic Consultant

Authorised by: Phil Evans BSc (Hons) MSc MIOA FGS

Senior Director - Acoustics

Date of issue: 19 December 2013

Revision: 0

Project number JAE7332

Document file path: O:\Jobs_7001-8000\7332e\Rev0\7332e_Report_Rev0_20131219.docx

RPS 6-7 Lovers Walk Brighton BN1 6AH T: +44 (0) 1273 546800 F: +44 (0) 1273 546801 E: [email protected] W: www.rpsgroup.com


JAE7332 19 December 2013/Rev0 rpsgroup.com

Quality Management

Revision History

Rev Date Status Reason for revision Additional comments

0 19/12/2013 Draft - -

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Contents

1 Introduction ............................................................................................................. 1

2 National Policy, Standards, Guidance, Local Policy & Consultation ................. 3

Acoustics: Technical Design Manual Version: 0.3: England DTM (4032:0.3) ............................... 6

3 Baseline Environment .......................................................................................... 12

Site and Area Description................................................................................................................. 12

Noise Monitoring ............................................................................................................................... 12

4 Assessment ........................................................................................................... 14

Suitability of the Site for Noise Sensitive Development ............................................................... 14

Noise Generating Aspects of Development ................................................................................... 17

Noise Transfer between Commercial/Retail and Noise Sensitive Development ........................ 20

5 Summary and Conclusions .................................................................................. 21

Glossary

References



Tables, Figures and Appendices

Tables Table 2.1: BS 8233 Indoor Ambient Noise Levels in Unoccupied Spaces .................................................. 6

Table 2.2: DTM 4032 Criteria for Intrusive Noise from External Sources .................................................... 7

Table 2.3: BS 4142 Rating Descriptions ...................................................................................................... 8

Table 2.4: Semantic Scale for Rating of Noise Impact ............................................................................... 10

Table 3.1: Long Term Baseline Noise Monitoring Summary ...................................................................... 13

Table 4.1 : Calculated Internal Noise Levels with Windows Closed and Partially Open for Facades

Opposite the A34 ........................................................................................................................................ 15


Opposite the B4044 .................................................................................................................................... 15

Figures Figure 3.1: Figure title

Figure 1: Botley, Westway - Noise Monitoring Locations

Figure 2: LT_A Baseline Noise Monitoring Data (5-minute period data)

Figure 3: LT_B Baseline Noise Monitoring Data (5-minute period data)

Figure 4: LT_C Baseline Noise Monitoring Data (5-minute period data)

Appendices Appendix A: Baseline Survey Data

Appendix B: Traffic Assessment


JAE7332 19 December 2013/Rev0 1 rpsgroup.com

1 Introduction

1.1 The Acoustics Team at the Brighton office of RPS Planning and Development (RPS) has been

appointed to provide an environmental acoustics assessment to accompany a planning

application for a mixed use development at West Way, Botley, Oxford. The site is located within

the administrative area of Vale of White Horse District Council (VWHDC).

1.2 The proposed development comprises the demolition of existing buildings, both commercial and

residential, within the site boundary, with the construction of new commercial, student and private

accommodation, and community facilities.

1.3 Significant operational vibration effects are unlikely. On this basis, vibration from the operation of

the project is scoped out and not considered further.

1.4 This report provides:

a description of the standards and guidance upon which the assessment methodology and

criteria are based;

a description of the surveys undertaken to determine the baseline noise climate at noise

sensitive receptors (NSRs) that could potentially be affected by the development and to

help determine suitability of the site for development;

an assessment of noise effects due to the proposal, including noise generated by on site

activities such as deliveries and fixed plant and noise associated with changes in traffic

flows as a result of the proposed development;

an assessment of the suitability of the site for the proposed development, both residential

and commercial, in terms of noise; and

a description of the recommended types of mitigation, if necessary, to meet the adopted

criteria.

1.5 The following documents have been considered in determining suitable noise criteria for the

development (further information is provided in Section 2 of this report):

National Planning Policy Framework (NPPF) [1];

Noise Policy Statement of England (NPSE) [2];

National Planning Practice Guidance (NPPG) [3];

British Standard (BS) 8233: Sound insulation and noise reduction for buildings - Code of

practice [4];

Acoustics: Technical Design Manual Version: 0.3: England DTM (4032:0.3) [5]

BS 4142: Method for Rating industrial noise affecting mixed residential and industrial areas

[6];



Institute of Environmental Assessment. Guidance Notes No. 1. Guidelines for the

Environmental Assessment of Road Traffic. 1993 [7];

Calculation of Road Traffic Noise (CTRN) [8]; and

Vale of White Horse Local Plan 2011 [9]



2 National Policy, Standards, Guidance, Local Policy & Consultation

NPPF

2.1 The NPPF, published in March 2012, sets out the Governments planning policies for England.

The document revokes and replaces Planning Policy Guidance Note 24 ‘Planning and Noise

(PPG 24) [10]. The document does not contain any specific noise policy, or noise limits except in

relation to noise from mineral workings, but it provides a framework for local people and local

authorities to produce their own local and neighbourhood plans, which reflect the needs and

priorities of their communities.

2.2 In Section 11, ‘Conserving and enhancing the natural environment’, paragraph 123 relates to

noise and states:

‘123. Planning policies and decisions should aim to:

avoid noise from giving rise to significant adverse impacts27 on health and quality of life as

a result of new development;

mitigate and reduce to a minimum other adverse impacts27 on health and quality of life

arising from noise from new development, including through the use of conditions;

recognise that development will often create some noise and existing businesses wanting

to develop in continuance of their business should not have unreasonable restrictions put

on them because of changes in nearby land uses since they were established;28 and

identify and protect areas of tranquillity which have remained relatively undisturbed by

noise and are prized for their recreational and amenity value for this reason.’

27 See Explanatory Note to the Noise Policy Statement for England (Department for the Environment, Food and

Rural Affairs).

28 Subject to the provisions of the Environmental Protection Act 1990 and other relevant law.’

2.3 The first bullet point refers to ‘significant adverse impacts’ which relates to the ‘significant

observed adverse effect level’ (SOAEL) in the Noise Policy Statement for England (NPSE),

though the term ‘effect’ is used instead of the term ‘impact’ although these have been deemed to

be interchangeable in this context. Therefore, given the comments above on the NPSE with

regard to assessment methods and criteria, the current content of the NPPF does not require any

change in previously adopted approaches. This is further endorsed by the noise limits provided

for mineral workings which are the same as those contained in the revoked Minerals Policy

Statement 2 on ‘Controlling and Mitigating the Environmental Effects of Minerals Extraction in

England, 2005.



NPSE

2.4 The NPSE, published in March 2010 by Defra, aims to provide clarity regarding current policies

and practices to enable noise management decisions to be made within the wider context, at the

most appropriate level, in a cost-effective manner and in a timely fashion.

2.5 Paragraph 1.6 of the NPSE sets out the long-term vision and aims of Government noise policy:

“Noise Policy Vision

Promote good health and a good quality of life through the effective management of noise within

the context of Government policy on sustainable development.”

“Noise Policy Aims

Through the effective management and control of environmental, neighbour and neighbourhood

noise within the context of Government policy on sustainable development:

avoid significant adverse impacts on health and quality of life;

mitigate and minimise adverse impacts on health and quality of life; and

where possible, contribute to the improvement of health and quality of life.”

2.6 The aims require that all reasonable steps should be taken to avoid, mitigate and minimise

adverse effects on health and quality of life whilst also taking into account the guiding principles

of sustainable development, which include social, economic, environmental and health

considerations.

2.7 With regard to the terms ‘significant adverse’ and ‘adverse’ included in the ‘Noise Policy Aims’,

these are explained further in the ‘Explanatory Note’ as relating to established concepts from

toxicology that are currently being applied to noise impacts, for example, by the World Health

Organisation which are:

‘NOEL – No Observed Effect Level

This is the level below which no effect can be detected. In simple terms, below this level, there is

no detectable effect on human health and quality of life due to noise.

LOAEL – Lowest Observed Adverse Effect Level

This is the level above which adverse effects on health and quality of life can be detected.’

2.8 Defra has then extended these concepts for the purpose of the NPSE to introduce the concept of:

‘SOAEL – Significant Observed Adverse Effect Level

This is the level above which significant adverse effects on health and quality of life occur.’



2.9 The accompanying explanation states:

‘It is not possible to have a single objective noise-based measure that defines SOAEL that is

applicable to all sources of noise in all situations. Consequently, the SOAEL is likely to be

different for different noise sources, for different receptors and at different times. It is

acknowledged that further research is required to increase our understanding of what may

constitute a significant adverse impact on health and quality of life from noise. However, not

having specific SOAEL values in the NPSE provides the necessary policy flexibility until further

evidence and suitable guidance is available’.

2.10 With regard to ‘further evidence’, Defra has commissioned research to try and identify the levels

at which the above effects occur but this is not yet in the public domain. However, early

indications are that this research has been largely inconclusive. On this basis, and until further

guidance becomes available, and given that there is no specific guidance in the NPPF on noise

except with regard to minerals, there is no justification to vary assessment methods and criteria

from those previously adopted from British Standards (BSs) etc.

NPPG

2.11 The Government has published draft revised NPPG to support the NPPF. The guidance is

intended to complement the NPPF and provide advice on how to deliver its policies. The draft

NPPG reiterates general guidance on noise policy and assessment methods provided in the

NPPF, NPSE and BSs and contains examples of acoustic environments commensurate with

various effect levels.

2.12 The NPPG describes noise that is not noticeable to be at levels below the NOEL. It describes a

range of noise exposure that is noticeable but not to the extent there is a perceived change in

quality of life. Noise exposures in this range are below the LOAEL and need no mitigation. On

this basis, the audibility of noise from a development is not, in itself, a criterion to judge noise

effects that is commensurate with national planning policy.

2.13 The NPPG suggests that noise exposures above the LOAEL cause small changes in behaviour.

An example of noise exposures above the LOAEL provided in the NPPG is having to turn up the

volume on the television or needing to speak more loudly to be heard. In line with the NPPF and

NPSE, the NPPG states that consideration needs to be given to mitigating and minimising effects

above the LOAEL but taking account of the economic and social benefits being derived from the

activity causing the noise.

2.14 The NPPG suggests that noise exposures above the SOAEL cause material changes in

behaviour. An example of noise exposures above the SOAEL provided in the NPPG is keeping

windows closed for most of the time or avoiding certain activities during periods when the noise is

present. In line with the NPPF and NPSE, the NPPG states that effects above the SOAEL should

be avoided and that whilst the economic and social benefits being derived from the activity

causing the noise must be taken into account, such exposures are undesirable.



British Standard 8233 ‘Sound insulation and noise reduction for buildings – Code of Practice’, 1999

2.15 BS 8233 ‘Sound insulation and noise reduction for buildings – Code of practice’ draws on the

results of research and experience to provide information on the design of buildings to provide

internal acoustic environments appropriate to their functions. It deals with control of noise from

outside the building, noise from plant and services within it, and room acoustics in non-critical

situations.

2.16 BS 8233 defines a range of indoor ambient noise levels for spaces when they are unoccupied,

below which ‘good’ or ‘reasonable’ conditions are achieved. A summary of the levels

recommended in BS 8233 Table 5 for rooms used for resting and sleeping is provided in

Table 2.1 below – the levels are for anonymous noise only.

2.17 The noise levels defined within BS 8233 are based on guidance published by the World Health

Organisation (WHO).

Table 2.1: BS 8233 Indoor Ambient Noise Levels in Unoccupied Spaces

Criterion Typical Situation Design Range LAeq,T dB

Good Reasonable

Reasonable resting/sleeping conditions Living Rooms

Bedrooms1

30

30

40

35

1 For a reasonable standard in bedrooms at night, individual noise events (measured with F time-weighting) should not normally exceed 45 dB LAmax.

2.18 In addition, the second paragraph of 7.6.1.2 states that:

‘As well as protection for the building, barriers or bunds should be considered to protect the

gardens. In gardens and balconies etc. it is desirable that the steady noise level does not exceed

50 LAeq,T dB and 55 LAeq,T dB should be regarded as the upper limit.’

Acoustics: Technical Design Manual Version: 0.3: England DTM (4032:0.3)

2.19 Acoustics: Technical Design Manual Version 0.3 (DTM 4032) has been written for healthcare

professionals to understand acoustic requirements and to help those involved in the development

of healthcare facilities. This replaces the former guidance in Health Technical Memorandum 08-

01: Acoustics [11] (HTM 08-01). The document recommends acoustic criteria for noise levels in

rooms from external sources.

2.20 The acoustic criteria for noise affecting the facility take into account the required use of the room,

for example, resting, sleeping, treatment, consultation and concentration. The criteria for intrusive

noise from external sources are provided in terms of LAeq,1hr and LAmax,F and are provided in Table

2.2.



Table 2.2: DTM 4032 Criteria for Intrusive Noise from External Sources

Location Recommended Internal Noise Level

LAeq,1hr (dB) LAmax,F (dB)2

Ward – single person 40 (daytime)

35 (night-time1) 45 (night-time1)

Ward – multi-bed 45 (daytime)

35 (night-time1) 45 (night-time1)

Small office-type spaces (including consulting rooms and small treatment rooms) 40 -

Open clinical areas (including A&E) 45 -

Circulation spaces 55 -

Public areas 50 -

Personal hygiene (en-suite)

Personal hygiene (public and staff ) 55 -

Small food-preparation areas 50 -

Large food-preparation areas 55 -

Large meeting rooms (>35 m2 floor area) 35 -

Small meeting rooms (≤35 m2 floor area) 40 -

Operating theatres 40 50

Laboratories 45 -

1 Night-time is defined as the hours between 23.00 and 07.00 hours

2 A LAmax,F limit for short-term events is included for sleeping areas and operating theatres. The intention is that this should apply to events that occur several times during the night (for example passing trains) rather than sporadic events

3 Where windows have trickle vents, the criteria would normally apply with the windows closed but trickle vents open. If natural ventilation is provided by means other than trickle vents, the acoustic criteria are to be achieved while the required amount of ventilation is supplied.

4 To achieve the acoustic criteria on noisy sites, acoustically treated trickle vents or mechanical ventilation may be required. Sealed façades may be necessary for the noisiest sites. The acoustic adviser should liaise with the services designer to establish what constitutes the required amount of ventilation, the size of trickle vents, and the acoustic implications of natural ventilation.

5 Noise from a service yard and other similar activities should be designed not to disturb noise-sensitive accommodation or noise-sensitive receptors outside the site. Where possible, the service yard should be kept away from accommodation, and canopies and other acoustic screening methods should be considered. Without these, it is unlikely that noise-sensitive rooms overlooking a service yard can use trickle vents or openable windows for ventilation. A sealed façade and mechanical ventilation are therefore likely to be required in these locations.

6 The intrusive noise criteria do not include plant noise from adjacent hospital buildings. This should be considered as mechanical service noise



BS 4142 ‘Method for Rating industrial noise affecting mixed residential and industrial areas’, 1997

2.21 BS 4142 ‘Method for Rating industrial noise affecting mixed residential and industrial areas’ is

used to assess noise from industrial and commercial developments. The Standard provides a

method for rating industrial noise affecting mixed residential and industrial areas and has been

extensively used by local authorities and consultants to rate noise from fixed installations, such

as plant noise.

2.22 The Standard advocates the use of LAeq, a level that is directly measurable. The LAeq is either

measured or calculated at a receptor location and this is termed the ‘specific noise level’. The

specific noise level may then be corrected for the character of the noise, if appropriate, and it is

then termed the ‘rating level’, whether or not a correction is applied. A correction of +5 dB is

made if the noise contains distinguishable, discrete and continuous tones (e.g. hums, whistles or

whines); distinct impulses (e.g. bangs, clicks, clatters or thumps) or if the noise is irregular

enough in character to attract attention.

2.23 When used to rate the likelihood of complaints, the rating level is determined and the LA90

background noise level is subtracted from it. Where positive differences occur, the greater the

difference between the two levels, the greater the likelihood of complaints. Where negative

differences occur, the greater the difference between the two levels, the lesser the likelihood of

complaints. A difference of around +10 dB or higher indicates that complaints are likely; a

difference of around +5 dB is of marginal significance; and a difference of -10 dB is a positive

indication that complaints are unlikely. These descriptions are summarised in Table 2.3.

Table 2.3: BS 4142 Rating Descriptions

BS 4142 Assessment Level dB(A)

(Rating level relative to background level)

BS 4142 Semantic

(as described in BS 4142)

< - 10 ‘If the rating level is more than 10 dB below the measured background level then this is a positive indication that complaints are unlikely’

- 10 to + 5 No BS 4142 description but the more negative the difference, the less the likelihood of complaints.

+ 5 ‘A difference of aroundi +5 dB is of marginal significance’

+ 5 to + 10 No BS 4142 description but the more positive the difference, the greater the likelihood of complaints.

> + 10 ‘A difference of aroundii 10 dB or more indicates that complaints are likely’

i‘around +5 dB’ is taken as between 3 dB and 7 dB

ii‘around 10 dB’ is taken as 8 dB or greater

2.24 BS 4142 states that measurement positions should be outside buildings in free-field conditions,

where the microphone is at least 3.5 m from any reflecting surfaces other than the ground and at



a preferred height of between 1.2 m and 1.5 m above ground level. However, where it is

necessary to make measurements above ground floor level, the measurement position, height

and distance from reflecting surfaces should be reported, ideally measurements should be made

at a position 1 m from the façade of the relevant floor.

2.25 BS 4142 states that the night period should cover the times when the general adult population

are preparing for sleep or are actually sleeping. When assessing the noise from night-time

operations, the period of 23:00 to 07:00 hours, is commonly adopted. Whilst BS 4142 may be

used to assess the likelihood of night-time noise complaints, it is generally accepted that other

appropriate criteria should be adopted for assessing sleep disturbance during night-time periods,

such as BS 8233 [12].

2.26 BS 4142 requires a ‘representative background noise level’ to be adopted for the assessment.

There is no Government or BS guidance that states what is considered to constitute

‘representative’ and the night-time period is particularly difficult as it can be subject to a wide

variation in noise level between the shoulder night periods.

2.27 In situations where the LA90 background and the rating noise levels are both ‘very low’ (less than

30 dB(A) and 35 dB(A), respectively) the Standard states that the rating method of BS 4142 is not

suitable. In these circumstances, for the night-time period (i.e. it is rare for this situation to occur

during the day), it is usually more appropriate to assess the noise impact by considering sleep

disturbance criteria and other aspects such as noise change. It should be noted that this is not a

BS 4142 or British Standards Institution (BSi) recommendation, as there is no advice given as to

an acceptable approach in these circumstances but it is accepted practice for situations of this

type.

Noise Change for Permanent Sources and Road Traffic

2.28 A change of 3 dB is the minimum perceptible under normal conditions [13] and a change of 10 dB

corresponds roughly to a halving or doubling of a sound. It is generally accepted that an increase

of 3 dB(A) or more is the threshold at which a permanent noise effect becomes significant.

2.29 It is also standard practice to categorise the degree of effect according to the extent of the

predicted noise change. This is frequently implemented by the use of semantic descriptors

associated with noise change bands. The approach has been used in the UK over the last 10

years in the assessment of road traffic schemes and is based on the premise that subjective

response to noise from a new source is proportional to the change in overall noise level. Hence,

the semantic scale provided in Table 2.4 has been adopted to describe noise change.



Table 2.3: Semantic Scale for Rating of Noise Impact

Predicted Change In LAeq,T or LA10,T Significant

Yes/No?

Semantic

Scale Rating Significance Rating

Decrease of more than 10 dB Yes Substantial Decrease Major Beneficial

Decrease of 6 - 10 dB Yes Moderate Decrease Moderate Beneficial

Decrease of 3 - 5 dB Yes Minor Decrease Minor Beneficial

Decrease of less than 3 dB No No significant change Negligible ~

Increase of less than 3 dB No No significant change Negligible ~

Increase of 3 - 5 dB Yes Minor Increase Minor Adverse

Increase of 6 - 10 dB Yes Moderate Increase Moderate Adverse

Increase of more than 10 dB Yes Substantial Increase Major Adverse

Calculation of Road Traffic Noise, 1988

2.30 The Department of Transport document, Calculation of Road Traffic Noise (CRTN), describes the

procedures for measuring and calculating noise from road traffic. These procedures are

necessary to enable entitlement under The Noise Insulation Regulations [14] to be determined

but they also provide guidance appropriate to the calculation of traffic noise for more general

applications e.g. environmental appraisal of road schemes, highway design and land use

planning. The document can also be used to generate scaling factors for expected increases in

road traffic and expected levels of attenuation from barriers.

Vale of White Horse District Council

2.31 The Vale of White Horse Local Plan is the current adopted local plan for VWHDC. Policy DC9,

section iii, of the plan relates to noise & vibration and specifically states.

“Policy DC9

Development will not be permitted if it would unacceptably harm the Amenities of neighbouring

properties and the wider environment in terms of: […]

iii) noise or vibration;”

2.32 Further to this, Section 4.23 states:



“Noise from road traffic, trains, aircraft, commercial and entertainment premises can have serious

effects on people’s lives and it is important that these effects are minimised. The planning

process can assist by ensuring that as far as possible ’noise sensitive’ developments, such as

dwellings, schools, hospitals and nursing homes, are located away from existing sources of noise

and that potentially noisy developments are located in areas where noise will not be such an

important consideration. In accordance with Planning Policy Guidance Note 24: Planning and

Noise (PPG24), the Council will ensure that new development does not cause an unacceptable

degree of disturbance. An environmental impact assessment may be sought for certain types of

project (see section on this below). Measures can be required to control the exposure to noise

through planning conditions. For example, developers may be required to insulate buildings, erect

screens or natural barriers, ensure adequate distances between the noise and the noise sensitive

land use or limit the operating times of a potentially noisy activity. Early consultation with the

Council is desirable.”

2.33 It should be noted that PPG 24 was revoked by the NPPF in March 2012 and hence is no longer

an applicable national policy relating to noise but the principles suggested in the above still apply.

2.34 An Environmental Health Officer (EHO)1 from VWHDC was consulted regarding the approach

that will be used to undertake the assessment and to agree baseline noise monitoring locations

and timings.

1 Alick Natton, July 2013



3 Baseline Environment

Site and Area Description

3.1 The proposed development consists of the redevelopment of land in Botley, Oxford for mixed

uses including a large food store; a number of smaller retail units; student accommodation; a

hotel; a gym and a medical centre. The site is bounded by the A34 dual carriageway road to the

east of the site and the B4044, West Way, to the north. The nearest NSRs are residential

properties directly to the south of the proposed site on Arthray Road and residential properties on

West Way, directly adjacent to the west and across the road to the north. St Paul’s Church is

located just off West Way to the north of the site.

3.2 The main existing sources of noise on site are considered to be road traffic on the A34 dual

carriageway and road traffic on the A420.

Noise Monitoring

3.3 Three seven day unattended baseline noise surveys were undertaken between Thursday 25th

July 2013 at 14.20 hours and Friday 2nd August at 23.00 hours, with data logged in 100 ms

periods. The baseline noise monitoring locations are shown on the plan provided in Figure 1. A

summary of the measured noise levels is provided in Table 3.1, with further details provided in

Appendix A and graphical representations in Figures 2, 3 and 4. Noise levels have been

determined for common noise indices for each 16-hour daytime (07:00 to 23:00 hours) and 8-

hour night-time (23:00 to 07:00 hours) within the survey period directly from the 100-ms data.

3.4 Survey LT_A was located on the roof of the existing Grant Thornton building at a distance of

approximately 20 m from the carriageway edge of the A34. The microphone was installed in

free-field conditions (i.e. at least 3.5 m from any reflecting surfaces, excluding the ground),

mounted on pole approximately 1.5 m above roof level. During the setting up and collection of the

survey, the following noise sources were audible: road traffic on the A34.

3.5 Survey LT_B was located at the front of the St Peter and St Paul Church approximately 15 m

from the edge of the B4044. The microphone was installed in free-field conditions (i.e. at least 3.5

m from any reflecting surfaces, excluding the ground), mounted on a tripod approximately 1.5 m

high. During the setting up and collection of the survey, the following noise sources were audible:

road traffic on the B4044, car doors being closed in the church car park, pedestrians walking by,

and a slight wind rustle of nearby trees.

3.6 Survey LT_C was located in the rear garden of the St Peter and St Paul Church. The microphone

was installed in free-field conditions (i.e. at least 3.5 m from any reflecting surfaces, excluding the

ground), mounted on pole approximately 2.5 m high. During the setting up and collection of the

survey, the following noise sources were audible: road traffic on the B4044, vehicle movements

on the adjacent car park, and aircraft passing overhead.



3.7 All instrumentation used during the survey was checked for calibration prior to and immediately

following each set of survey measurements and no significant deviation was found.

3.8 Meteorological conditions during the survey period have been obtained from a local weather

station2 located approximately 6 km north-west of the site and have been considered as suitable

for the period of noise monitoring (wind speeds generally below 5 m/s and only light periods of

rainfall recorded) and as such no data has been discarded.

Table 3.1: Long Term Baseline Noise Monitoring Summary

Survey Period Duration, T

(Hours) LAeq,T dB LAmax,T dB* LA10,T dB LA90,T dB

LT_A 07:00 – 23:00 hours 16 71 75 - 93 73 66

23:00 – 07:00 hours 8 67 74 - 83 71 50

LT_B 07:00 – 23:00 hours 16 62 72 - 96 65 49

23:00 – 07:00 hours 8 54 69 - 78 57 34

LT_C 07:00 – 23:00 hours 16 53 61 - 91 53 44

23:00 – 07:00 hours 8 45 50 - 82 46 36

*Expressed as a range of highest LAmax,1hr levels

2 http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=IOXFORDS46

http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=IOXFORDS46



4 Assessment

Suitability of the Site for Noise Sensitive Development

Student Accommodation

4.1 Student accommodation is located on the northern side of the development at third floor level and

above. The north-east façade of the proposed accommodation is at a similar distance from the

A34 as the existing Grant Thornton building. The north-west façade of the building is

approximately 10 m from the edge of the West Way (B4044).

4.2 The student accommodation within the development will be designed to provide a suitable

environment for sleeping and resting and has therefore been assessed using the criteria in

BS 8233 described in Section 2 of this report.

4.3 Noise levels monitored at NML_A are representative of facades of the student accommodation

building that have line-of-sight to the A34. From Table 3.1, the average daytime noise levels

experienced at LT_A are 71 dB LAeq,16hr and the average night-time noise levels are 67 dB LAeq,8hr.

Hourly maximum noise levels are between 74 and 83 dB LAmax during the night-time period.

4.4 Noise levels monitored at NML_B are representative of facades of the student accommodation

building that have line-of-sight to the B4044. Table 3.1, the average daytime noise levels

experienced at LT_A are 62 dB LAeq,16hr and the average night-time noise levels are 54 dB LAeq,8hr.

Hourly maximum noise levels are between 69 and 78 dB LAmax during the night-time period.

4.5 As far as sound insulation is concerned, Approved Document E of the Building Regulations [15]

is primarily concerned with the transmission of sound between dwellings, or from adjoining

spaces where there is likely to be noisy activity, rather than from transmission through the

building envelope from external noise sources. It is generally accepted that the windows of any

dwelling are the weakest point of the building fabric with regards to sound transmission,

especially when the resident opens windows to provide natural, rapid ventilation.

4.6 In accordance with The Building Regulations 2000 Approved Document L 'The Conservation of

Fuel and Power in Buildings' [16], all new dwellings must be constructed with appropriate thermal

double glazed window units. Table 10 of BS 8233 contains values for the difference between

internal and external free-field dB(A) levels for a façade with thermal double-glazed units. The

attenuation of a double glazed window is 33 - 35 dB(A). This reduces to 10 – 15 dB(A) for a

partially open window.

4.7 Tables 4.1 and 4.2 summarise the predicted internal noise levels based on the free-field daytime

and night-time noise levels, for rooms with façades opposite the A34 and the B4044 respectively.




Opposite the A34

Façades opposite the A34

Daytime Noise Levels (07:00 –

23:00 hours)

Night time Noise Levels

(23:00 – 07:00 hours)

LAeq,T dB LAeq,T dB LAFmax dB

Free-field Level 71 67 74 - 83

Insulation of façade with Thermal Double Glazing 1 33 - 35 33 - 35 33 – 35

Calculated Internal Level with Thermal Double Glazing (Window Closed) 36 - 38 32 - 34 39 - 50

BS 8233:1999 Rating (Residential) Reasonable Reasonable Reasonable

Insulation provided by window partially open 10 – 15 10 - 15 10 -15

Calculated Internal Level with Partially Open Windows 56 - 61 52 - 57 59 - 73

BS 8233:1999 Rating (Residential) Above Reasonable Design Rating

Above Reasonable Design Rating


*1 Obtained from BS 8233 Table 10

Table 4.2 : Calculated Internal Noise Levels with Windows Closed and Partially Open for Facades Opposite the B4044

Façades opposite the B4044


23:00 hours)


(23:00 – 07:00 hours)

LAeq,T dB LAeq,T dB LAFmax,T dB

Free-field Level 62 54 69 - 78

Insulation of façade with Thermal Double Glazing 1 33 - 35 33 - 35 33 – 35

Calculated Internal Level with Thermal Double Glazing (Window Closed) 27 – 29 19 - 21 34 – 45

BS 8233:1999 Rating (Residential) Good Good Reasonable

Insulation provided by window partially open 10 – 15 10 - 15 10 - 15

Calculated Internal Level with Partially Open Windows 47 – 52 39 – 44 54 – 68



Façades opposite the B4044


23:00 hours)


(23:00 – 07:00 hours)

LAeq,T dB LAeq,T dB LAFmax,T dB

BS 8233:1999 Rating (Residential) Above Reasonable Design Rating



*1 Obtained from BS 8233 Table 10

4.8 From Table 4.1, with closed standard thermal double glazed windows, internal noise levels within

student accommodation that has line-of-sight to the A34 would be around 36 to 38 dB LAeq,16hr

during the daytime and 32 to 34 dB LAeq,8hr during the night-time. These levels lie within the

‘reasonable’ design range of BS 8233. With closed standard thermal double glazed windows

internal maximum noise levels would be between 39 and 50 dB LAmax. Therefore levels would, on

occasion exceed 45 dB LAmax but this is likely to be infrequent (i.e. less than 10 times per night),

and the internal noise environment would be ‘reasonable’ with respect to maximum noise levels.

4.9 From Table 4.2, with closed standard thermal double glazed windows internal noise levels within

student accommodation that has line-of-sight to the B4044 would be around 27 to 29 dB LAeq,16hr

during the daytime and 19 to 21 dB LAeq,8hr during the night-time. These levels lie within the ‘good’

design range of BS 8233. With closed standard thermal double glazed windows internal

maximum noise levels would be between 34 and 45 dB LAmax. Therefore levels would generally

be below 45 dB LAmax, and therefore the internal noise environment would be ‘reasonable’ with

respect to maximum noise levels.

4.10 Predictions indicate that the ‘good’ to 'reasonable' criteria can only be achieved with reference to

BS 8233 in habitable rooms, with windows open, where the external free-field noise level is 50 dB

LAeq or below, which is unlikely to be achieved on this site. Therefore an alternative means of

ventilation will be required for student accommodation. The ventilation specification should meet

the Building Requirements Approved Document F 'Ventilation' [17].

4.11 As good to reasonable environments can be achieved with standard thermal double glazing, it is

recommended that ventilation be provided that does not compromise the attenuation of the

facade. Furthermore, this will be in compliance with the requirements of the Building Regulations.

4.12 The use of trickle ventilators should provide adequate sound insulation on residential facades that

have sight to the A34 and the B4044. The exact acoustic specification will be established once

room volumes and window areas are finalised.

4.13 The above analysis demonstrates that with good design suitable internal environments can be

provided in student accommodation.



Hotel

4.14 The hotel is located to the north-west of the site opposite the A34. It is recommended that hotel

rooms also achieve the ‘reasonable’ design range of BS 8233. From Table 4.1 above, this can be

achieved through the use of standard thermal double glazing and ventilation units. It is likely that

hotels will require mechanical ventilation to meet current building regulations. Therefore, through

good design, suitable internal noise levels should be achieved within the hotel.

Medical Centre

4.15 The medical centre is located to the west of the site with access from West Way (B 4044). From

Table 2.2, the majority of rooms within the medical centre are likely to be ‘Small office-type

spaces (including consulting rooms and small treatment rooms)’, for which DTM 4032 states an

internal noise level criteria of 40 dB LAeq.

4.16 As there will be retail units to the north of the medical centre, it is unlikely that there will be direct

line-of-sight to the B4044 and surveys at LT_C are taken to be indicative of the noise levels to be

experienced at the medical centre. From Table 3.1, daytime noise levels are 53 dB LAeq,16hr at

LT_C. Any standard cladding and glazing system will provide the required sound insulation

performance of 13 dB Rw and from above an open window will provide a sound insulation of 10 –

15 dB Rw. Therefore natural ventilation will be a suitable ventilation strategy for the medical

centre.

4.17 On the basis of the above, there are no specific constraints on the medical centre with respect to

noise and the site can be considered suitable for this purpose.

Noise Generating Aspects of Development

Road Traffic

4.18 An assessment of noise from traffic associated with the development has been carried out based

upon traffic data provided by RPS for four different scenarios:

the opening year without the proposed development;

the opening year with the proposed development;

the opening year +15 without the proposed development; and

the opening year +15 with the proposed development.

4.19 The quoted levels are the change in noise levels arising along each road-link; these reflect the

maximum noise change that might be experienced by the NSRs for which that link is the

dominant noise source. Data has been produced for each scenario for a total of eleven different

road-links.

4.1 Traffic data have been generated for the daytime period in terms of AAWT 06:00 to 24:00 as this

is commensurate with the CRTN calculation procedure and the night-time period in terms of



AADT 23:00 to 07:00 as this is commensurate with the periods used in the Design Manual for

Roads and Bridges Volume 11 Section 3 Part 7: ‘Noise and Vibration’ [18] (DMRB) for the

assessment of road traffic noise.

4.2 A calculation of noise change has been carried out based upon the calculation method in the

CRTN for the following three situations:

the opening year with the proposed development minus the opening year without the

proposed development;

the opening year +15 with the proposed development minus the opening year +15 without

the proposed development; and

the opening year +15 with the proposed development minus the opening year without the

proposed development.

4.3 The results of the traffic noise change assessment are provided in Appendix B. These have been

assessed according to the noise change criteria adopted for this assessment and provided in

Table 2.4.

18-Hour Daytime AAWT Flows (06:00 – 24:00 hours)

4.4 The calculations indicate that the noise change for each of the eleven links for the first two

situations described above range from 0.0 dB to +2.5 dB, all being below +3 dB which is

considered to be a level of ‘no significant change’ in the DMRB with negligible significance.

4.5 The calculations for the third situation indicate that for link four, ‘Westminster Way’, the noise

change will be +3.1 dB, which is considered to be a level of ‘minor increase’ in the DMRB with

minor adverse significance. However there are no NSRs close to Westminster Way and

additionally the busy A34 dual carriage way runs directly adjacent, approximately 10 m to the

east, which will be the dominant noise source in the area. Therefore an increase in noise level

from this link will not cause any direct increase in noise levels experienced at existing residential

properties within this area.

4.6 The calculations of the remaining ten links indicate the noise change will all be below +3 dB

which is considered to be a level of ‘no significant change’ in the DMRB with negligible

significance.

8-Hour Night-time AADT Flows (23:00 – 07:00 hours)

4.7 The calculations indicate that the noise change for all eleven links for each of the three situations

described above range from 0.0 dB to +1.4 dB, all being below +3 dB which is considered to be a

level of ‘no significant change’ in the DMRB with negligible significance.

4.8 On the basis of the above, it is not expected that there will be any adverse effects from the

development, during both the daytime and night-time periods, with respect to road traffic

generated by the development.



4.9 With respect to the NPSE, the results of the Noise Change assessment show a negligible

significance and therefore any effects arising from additional vehicle movements can be

considered to be at a level below SOAEL.

Delivery Vehicles and Service Yard Areas

4.10 A service yard and access area is located at first floor level to the south-east of the large retail

building adjacent to the boundaries with Westminster Way and residential properties on Arthray

Road. Noise generating activities in the service yard area are likely to include movements from

large HGVs; forklift trucks loading and unloading goods and wheeled cages. A service area is

also located at first floor level further to the west on the south-east boundary of the site at a

location adjacent to the retail units around that area.

4.11 Noise from deliveries and service yard activity areas may cause noise disturbance at residential

properties on Arthray Road, particularly if deliveries are to be made in the early morning. In order

to minimise disturbance a plan should be put into place as to how operations will carried out.

Scheduled delivery hours should be submitted to and agreed in writing with VWDC. It is

recommended that deliveries only take place between 07:00 and 19:00 on Monday to Friday and

between 07:00 to 13:00 on Saturdays.

4.12 Within the detailed design of the schemes, service areas should be designed such that they

include mitigation for noise. A solid wall or boundary fencing between the site and residential

properties on Anthray Road should be included with a minimum height of 2 m to provide

mitigation for any noise from service yard areas. The following noise reduction methods could

also be employed: Provision of enclosed loading bays with the majority of loading and unloading

activities taking place inside; utilising white noise reversing alarms as opposed to bleepers for all

delivery vehicles; ensuring service yard gates are closed outside scheduled delivery hours to

disable early vehicles from accessing the site.

4.13 Further details and assessments may be required at a later stage when detailed plans for service

yard areas and planned delivery schedules are in place. This information could be requested

within a suitably worded planning condition.

Fixed Mechanical Plant

4.14 All mechanical plant associated with the proposed development, including the HVAC, plant rooms

and externally mounted plant, will be specified and operated in such a manner as to ensure that

rating levels (LAeq) are no more than +5 dB(A), on a cumulative basis, above the typical

background noise level (LA90) during the time of plant operation at 1 m from any NSR.

4.15 Background noise levels used in the following assessment have been taken from survey LT_C,

as this is considered the most representative location for both the existing and proposed NSRs.

Daytime and night-time levels used are therefore 44 dB LA90 and 36 dB LA90 respectively.

Therefore:



a rating level of 49 LAeq dB should not be exceeded at 1 m from NSRs during the daytime

period (07:00 - 23:00 hours); and

a rating level of 41 dB LAeq should not be exceeded at 1 m from NSRs during the night-time

period (23:00 - 07:00 hours).

4.16 If the noise contains ‘distinguishable, discrete and continuous tones (e.g. hums, whistles or

whines); distinct impulses (e.g. bangs, clicks, clatters or thumps) or if the noise is irregular

enough in character to attract attention’ then the following criteria should be applied:

a rating level of 44 LAeq dB should not be exceeded at 1 m from NSRs during the daytime

period (07:00 - 23:00 hours); and

a rating level of 36 dB LAeq should not be exceeded at 1 m from NSRs during the night-time

period (23:00 - 07:00 hours).

4.17 With an appropriate design specification, noise from mechanical plant associated with the

proposed development can be controlled to achieve the above criteria. Further details and

assessments may be required at a later stage when detailed plans and specifications for fixed

mechanical installations are in place. This information could be requested within a suitably

worded planning condition.

Noise Transfer between Commercial/Retail and Noise Sensitive Development

4.18 Noise transfer between the commercial and retail units and noise sensitive development including

the student accommodation, hotel and medical centre will be controlled through appropriate

sound insulation and buildings design to ensure that residents are not unduly disturbed. The

walls and floors that separate noise sensitive areas should be designed to exceed the

requirements of Building Regulations Approved Document Part E for airborne sound insulation by

5 dB.

4.19 Noise levels from commercial/retail units should be designed to achieve NR20 or better in

adjacent student accommodation, hotel rooms or medical treatment rooms. Noise levels from

commercial/retail units should be designed to achieve NR30 or better in adjacent

commercial/retail units. The Noise Rating (NR) method has been used since it takes into account

the frequency content of the noise and is generally regarded as a means of rating internal

environments where a quiet environment is required. In this situation, NR20 and NR30 have

been specified to remove the risk that residents/occupants will be disturbed by commercial/retail

activities.

4.20 The tenants of the commercial/retail units will be responsible for ensuring that their operational

activities do not cause disturbance. This would normally be enforced by conditions within the

lease.



5 Summary and Conclusions

5.1 The Acoustics Team at the Brighton office of RPS Planning and Development has been

commissioned to provide a noise assessment to accompany a planning application for the mixed

use development at West Way, Botley, Oxford. The site of the proposed development is located

within the administrative area of VWHDC.

5.2 The suitability of the noise sensitive aspects of the site for development have been assessed.

Internal noise levels for the student accommodation and hotel, assessments have been carried

out following the guidance in BS 8233. It has been determined that good to reasonable

environments can be achieved with closed standard thermal double glazed windows and

mechanical or attenuated natural ventilation systems.

5.3 Internal noise levels within the medical centre have been assessed following the guidance in

DTM 4032. It has been determined that suitable internal environments can be achieved with any

standard cladding or glazing system and natural ventilation.

5.4 Noise change from traffic from traffic generated by the site has been assessed. It has been

determined that increases in noise levels due to traffic will not be significant. Therefore any

effects arising from additional vehicle movements can be considered to be at a level below

SOAEL.

5.5 Noise levels from the service areas will need to be controlled to ensure that residents within the

area will not be disturbed by noise from delivery vehicles and associated activities. Control

measures for noise from service areas have been provided, which will need to be considered

within the detailed design proposals.

5.6 Noise levels from fixed mechanical installations will need to be controlled such that noise levels at

residential locations are below a level of marginal significance with respect to BS 4142. Design

criteria based upon measured background noise levels have been provided.

5.7 In order to ensure adequate protection of noise sensitive aspects of the site from noise

generating aspects of the site, noise control measures between commercial and noise sensitive

development have been specified.

5.8 The assessments indicate that, with suitable design, the noise sensitive aspects of the

development can be protected from existing and proposed noise generating development. With

suitable design and control measures, existing NSRs can be protected from noise from the site.

With respect to NPSE, noise generated by the site will be controlled to be at a level below the

SOAEL. On this basis, there is no reason with respect to noise why planning permission should

not be granted for the development.



Glossary

Noise is defined as ‘sound which is undesired by the recipient’. The range of audible sound is from 0 dB

to 140 dB. The frequency response of the ear is usually taken to be about 18 Hz (number of oscillations

per second) to 18000 Hz. The ear does not respond equally to different frequencies at the same level. It

is more sensitive in the mid-frequency range than the lower and higher frequencies and because of this,

the low and high frequency components of a sound are reduced in importance by applying a weighting

(filtering) circuit to the noise measuring instrument. The weighting which is most widely used and which

correlates best with subjective response to noise is the dB(A) weighting. This is an internationally

accepted standard for noise measurements.

For variable noise sources such as traffic, a difference of 3 dB(A) is just distinguishable. In addition, a

doubling of a noise source would increase the overall noise by 3 dB(A). For example, if one item of

machinery results in noise levels of 30 dB(A) at 10 m, then two identical items of machinery adjacent to

one another would result in noise levels of 33 dB(A) at 10 m. The ‘loudness’ of a noise is a purely

subjective parameter but it is generally accepted that an increase/decrease of 10 dB(A) corresponds to a

doubling/halving in perceived loudness.

External noise levels are rarely steady but rise and fall according to activities within an area. In an

attempt to produce a figure that relates this variable noise level to subjective response, a number of noise

indices have been developed. These include:

LAmax noise level: This is the maximum noise level recorded over the measurement period.

LAeq noise level: This is the ‘equivalent continuous A-weighted sound pressure level, in decibels’

and is defined in British Standard 7445 (BS 7445) [19] as the ‘value of the A-weighted sound

pressure level of a continuous, steady sound that, within a specified time interval, T, has the

same mean square sound pressure as a sound under consideration whose level varies with time’.

It is a unit commonly used to describe construction noise and noise from industrial premises and

is the most suitable unit for the description of other forms of environmental noise. In more

straightforward terms, it is a measure of energy within the varying noise. It is also the unit best

suited to assessing community response.

LA10 noise level: This is the noise level that is exceeded for 10% of the measurement period and

gives an indication of the noisier levels. It is a unit that has been used over many years for the

measurement and assessment of road traffic noise.

LA90 noise level: This is the noise level that is exceeded for 90% of the measurement period and

gives an indication of the noise level during quieter periods. It is often referred to as the

background noise level and is used in the assessment of disturbance from industrial noise.


JAE7332 19 December 2013/Rev0

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References

1 Department for Communities and Local Government. National Planning Policy Framework:

HMSO. 2012.

2 Department for Environment, Food and Rural Affairs. Noise Policy Statement for England. Defra.

2010. British Standards Institution.

3 Department for Communities & Local Government. National Planning Practice Guidance

[http://planningguidance.planningportal.gov.uk/]. Accessed 07 October 2013.

4 British Standards Institution. British Standard 8233: Sound insulation and noise reduction for

buildings - Code of practice. BSI. 1999.

5 Department of Health. Acoustics: Technical Design Manual. The Stationery Office. 2011.

6 British Standards Institution. British Standard 4142: Method for Rating industrial noise affecting

mixed residential and industrial areas. BSI. 1997.

7 Institute of Environmental Assessment. Guidance Notes No. 1. Guidelines for the Environmental

Assessment of Road Traffic. 1993

8 Department of Transport. Calculation of Road Traffic Noise. HMSO. 1988.

9 Vale of White Horse District Council. Vale of White Horse Local Plan. 2011.

10 Reference Department of the Environment. Planning Policy Guidance: Planning and Noise (PPG 24). HMSO. 1994.

11 Department of Health Gateway Review, Estates & Facilities Division. Health Technical

Memorandum 08-01: Acoustics. The Stationery Office. 2008.

12 British Standards Institution. British Standard 8233: Sound insulation and noise reduction for buildings - Code of practice. 1999.

13 Department of the Environment. Planning Policy Guidance: Planning and Noise (PPG 24).

HMSO 1994.

14 Statutory Instrument No. 1763. The Noise Insulation Regulations 1975. Statutory Instrument No.

2000. The Noise Insulation (Amendment) Regulations 1988. HMSO. 1975 Amended 1988.



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15 The Building Regulations 2010. Approved Document L: Conservation of Fuel and Power. Office

of the Deputy Prime Minster. 2010.

16 Statutory Instrument No. 1763. The Noise Insulation Regulations 1975. Statutory Instrument No.

2000. The Noise Insulation (Amendment) Regulations 1988. HMSO. 1975 Amended 1988.

17 The Building Regulations 2010. Approved Document F: Ventilation. Office of the Deputy Prime

Minster. 2010.

18 Highways Agency. Design Manual for Roads and Bridges. Volume 11. Section 3. Part 7: Noise

and Vibration. August 2008.

19 British Standards Institution. British Standard 7445: Description and measurement of

environmental noise. Part 1: Guide to environmental quantities and procedures. 2003.



Figures



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Figure 1: Botley, Westway - Noise Monitoring Locations

LT_B

LT_C LT_A

Key

Noise Monitoring

Location



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Figure 2: LT_A Baseline Noise Monitoring Data (5-minute period data)



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Figure 3: LT_B Baseline Noise Monitoring Data (5-minute period data)



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Figure 4: LT_C Baseline Noise Monitoring Data (5-minute period data)



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Appendices



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Appendix A: Baseline Survey Data

Appendix A: Baseline Noise Survey ResultsAuthor: PBQMS:

Long Term Unattended Survey Results

Job Number: JAE 7332

Site ID: LT_ASite Description: Roof of Grant Thornton Building

Date: Thursday 25th July 2013 to Friday 02nd August 2013

Setting: A frequency-weighting, Fast time-weightingFaçade/Free-field: Free-fieldMicrophone Height: 1.5 m

Meter ID: RPS#19 Rion NL-32 s/n:Calibrator ID: RPS#33 Rion NC-74 s/n: 34472822Calibration at Start: 94.0 dBCalibration at End: 93.7 dB

Weather at time of setup: Sunny/ Light Wind

Notes: Traffic on A34

Daytime Baseline Noise Survey Results

LAeq LA10 LA90

26/07/2013 07:00 16 70 75 93 73 6627/07/2013 07:00 16 70 76 84 73 6628/07/2013 07:00 16 70 76 88 73 6629/07/2013 07:00 16 72 76 86 74 6730/07/2013 07:00 16 72 77 84 74 6731/07/2013 07:00 16 72 77 84 74 6701/08/2013 07:00 16 71 76 88 74 67

Night-time Baseline Noise Survey Results

LAeq LA10 LA90

25/07/2013 23:00 8 67 75 80 72 5226/07/2013 23:00 8 66 75 83 70 5227/07/2013 23:00 8 64 74 78 68 4828/07/2013 23:00 8 67 75 79 72 4729/07/2013 23:00 8 67 75 81 72 4730/07/2013 23:00 8 67 76 79 72 5131/07/2013 23:00 8 67 76 81 72 5001/08/2013 23:00 8 67 76 83 72 51

Noise Metric (dB)Range of hourly

LAmax

Range of hourly LAmax

Noise Metric (dB)

LT_A

Time (hours)

Time (hours)

Location Period (Date Time)

LT_A


7332E_Survey_Data_20130814 Page 1 of 3 18/12/2013




Site ID: LT_BSite Description: Front of St Pauls Church





Notes: Traffic on West WaySlight Wind Noise


LAeq LA10 LA90

26/07/2013 07:00 16 62 73 92 65 5027/07/2013 07:00 16 62 72 84 65 4928/07/2013 07:00 16 60 72 88 64 4629/07/2013 07:00 16 63 73 92 66 5030/07/2013 07:00 16 63 73 84 67 5131/07/2013 07:00 16 62 73 96 66 5001/08/2013 07:00 16 61 73 87 64 49


LAeq LA10 LA90

25/07/2013 23:00 8 54 71 76 58 3526/07/2013 23:00 8 54 72 77 58 3827/07/2013 23:00 8 56 70 76 59 3628/07/2013 23:00 8 54 72 89 56 3429/07/2013 23:00 8 53 71 75 56 3430/07/2013 23:00 8 53 69 74 55 3331/07/2013 23:00 8 53 70 73 56 3201/08/2013 23:00 8 53 71 78 57 34



Noise Metric (dB)

Noise Metric (dB)Location Period

(Date Time)Time

(hours)

LT_B


Time (hours)

LT_B





Site ID: LT_CSite Description: Rear of St Pauls Church





Notes: Traffic on West WayTraffic in Car ParkAircraft Overhead


LAeq LA10 LA90

26/07/2013 07:00 16 51 69 86 53 4427/07/2013 07:00 16 51 62 82 53 4428/07/2013 07:00 16 52 62 83 52 4429/07/2013 07:00 16 55 67 87 55 4530/07/2013 07:00 16 52 61 83 55 4531/07/2013 07:00 16 52 65 77 54 4501/08/2013 07:00 16 52 64 91 53 44


LAeq LA10 LA90

25/07/2013 23:00 8 45 56 74 46 3626/07/2013 23:00 8 43 55 64 45 3727/07/2013 23:00 8 43 54 82 45 3728/07/2013 23:00 8 45 51 80 47 3629/07/2013 23:00 8 44 50 69 47 3630/07/2013 23:00 8 44 55 71 46 3531/07/2013 23:00 8 45 50 79 46 3601/08/2013 23:00 8 47 50 81 46 36


Noise Metric (dB)

Noise Metric (dB)Range of hourly

LAmax


Time (hours)

LT_C


Time (hours)

LT_C




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Appendix B: Traffic Assessment

APPENDIX: B Road Traffic Noise Change Assessment

Job No: JAE7332

Date: 16/12/13

CRTN CALCULATIONS FOR NOISE CHANGE - 18-hour Flows (06:00 - 24:00 hours)

Opening Year with Development

Opening Year +15 with Development


minus minus minus

No Road Section

Opening Year without

Development

Opening Year +15 without

Development


Development1 B4044 Eynsham Road 0.5 0.4 1.32 Cumnor Hill 0.3 0.2 1.23 West Way (adjacent to Church) 0.5 0.4 1.44 Westminster Way 2.5 2.1 3.15 West Way (west of Seacourt retail park) 1.3 1.1 2.06 West Way (east of Seacourt retail park 1.2 1.0 2.07 West Way (east of A420 slip road) 0.3 0.2 1.28 A420 / A34 slip road 0.6 0.5 1.49 A420 west of A34 0.1 0.0 1.010 A34 south of A420 junction 0.0 0.0 0.011 A34 north of A420 junction 0.0 0.0 1.0

CRTN CALCULATIONS FOR NOISE CHANGE - 8-hour Flows (23:00 - 07:00 hours)

Opening Year with Development



minus minus minus

No Road Section


Development

Opening Year +15 without

Development


Development1 B4044 Eynsham Road 0.1 0.1 1.02 Cumnor Hill 0.1 0.1 1.03 West Way (adjacent to Church) 0.1 0.1 1.14 Westminster Way 0.6 0.5 1.45 West Way (west of Seacourt retail park) 0.3 0.2 1.26 West Way (east of Seacourt retail park 0.3 0.2 1.27 West Way (east of A420 slip road) 0.1 0.0 1.08 A420 / A34 slip road 0.2 0.1 1.19 A420 west of A34 0.0 0.0 1.0

10 A34 south of A420 junction 0.0 0.0 0.011 A34 north of A420 junction 0.0 0.0 1.0

7332e_Traffic_Assessment_rev0_20131216 1 18/12/2013

7893

-66

Contact

Susan Hirst RPS Planning & Development 6-7 Lovers Walk Brighton East Sussex BN1 6AH

T: +44 (0) 1273 546 800 E: [email protected]

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