Cadley Hill Mixed-Use
Development
Noise Impact Assessment
August 2012
[Type text]
Notice
This document and its contents have been prepared and are intended solely for St. Modwen’s information
and use in relation to Cadley Hill Residential Development Noise Assessment.
Atkins Ltd assumes no responsibility to any other party in respect of or arising out of or in connection with
this document and/or its contents.
Executive Summary
Atkins was commissioned by St. Modwen to undertake assessments to support an outline planning
application for a mixed-use development on the land south of the Cadley Hill Industrial Estate. This is an
update to a previous Atkins’ assessment which considered the suitability of the site for residential
development only. This report presents a noise assessment of the site to assess its suitability for residential
development with regard to noise from all sources but in particular from the A444 road and Cadley Hill
Industrial Estate.
This report has been prepared to the scope and approach proposed by the Local Authority Environmental
Health Officer and is based on theoretical conditions. These theoretical conditions are not supported by
Atkins. The approach does not reflect the actual conditions present on the site as was demonstrated during
the noise survey. Furthermore the approach does not reflect current planning restrictions which mean that
such theoretical conditions are unlikely to ever occur. Therefore whilst this report shows how the
development can be accommodated on the site, with mitigation for such theoretical noise, it goes beyond
what the assessment would indicate would more reasonably be required given the existing situation at the
industrial estate
Since the original assessment was undertaken there have been changes to national planning guidance due
to the publication of the National Planning Policy Framework in March 2012. The previous assessment
methodology of Planning Policy Guidance 24 has been retained in this assessment to be consistent with the
previously undertaken work and reporting. Other relevant assessments which remain current have also
been undertaken.
The main findings are summarised as follows:
The general ambient noise climate would not present a major constraint for the proposed residential
development. The site would mainly fall into Planning Policy Guidance 24 Noise Exposure Category (NEC) A
or B both during day-time and night-time, where noise issues are not considered to be a significant concern.
However the nearest parts of the development to A444 would fall into NEC C, where mitigation would be
required. In order to ensure that no part of the development is in Noise Exposure Category C, a buffer zone,
approximately 15m wide, is proposed between the A444 Burton Road and the proposed dwellings.
An assessment has been undertaken to determine the likely constraints from the existing Cadley Hill
Industrial Estate. As required by the Local Authority, the assessment has been based on a worst-case
scenario to represent a potential future use of the Cadley Hill Industrial Estate at night.
In order to ensure impacts from typical current operation of Cadley Hill Industrial Estate are kept to a
minimum, an employment buffer zone has been incorporated into the design between Cadley Hill Industrial
Estate and a large proportion of the proposed dwellings. In addition, a 3m high acoustic barrier along the
northern and north-eastern boundary of the site has been considered.
Taking into account these mitigation measures, together with the potential for the detailed design and layout
of the eastern strip of the site, the noise environment should be suitable on the site for the proposed
residential use.
Measures will need to be taken to ensure that noise from the employment area of the development does not
produce adverse noise impacts at residential receptors either directly or via the road network through the
development.
In summary, the site is suitable for residential development provided that noise is considered in the layout
and design of the development.
Table of contents
Chapter
pages
1. Introduction
1 2. Methodology
2 NPPF
PPG 24: 1994 (withdrawn March 2012)
BS 4142: 1997
BS 8233: 1999
World Health Organisation (WHO) Guidelines for Community Noise
2 2 4 4 4 3. Noise Measurements
6 4. Assessment
8 PPG 24 Noise Exposure Categories
Cadley Hill Industrial Estate
8 9 5. 6. Mitigation
15 A444 Burton Road
Cadley Hill Industrial Estate
15 15 Conclusions
16 PPG 24 Noise Exposure Category
Typical Day-time Operations - Cadley Hill Industrial Estate
Night-time Operations - Cadley Hill Industrial Estate
Overall
16 16 17 17 Tables
Table 2-1 – Classification of Noise Exposure Categories (NEC)
Table 2-2 – Quantification of Noise Exposure Categories (NEC)
Table 2-3 – Design Ranges for Noise Levels within Residential Rooms
Table 2-4 – Extract from WHO ‘Guidelines for Community Noise
Table 3-1 – Summary of Measured Noise Levels
Table 4-1 – Noise Exposure Category at Sample Noise Monitoring Sites
Table 4-2 – Assumed source noise levels from units in Cadley Hill Industrial Estate
Table 4-3 – Indicative BS 4142 calculation
Table 6-1 – Measured noise levels at Position 1
Table 6-2- Measured noise levels at Position 2
Table 6-3 - Measured noise levels at Position 3
Table 6-4 – List of Industrial Premises located in the Cadley Hill Industrial Estate
Table 6-6 – Potential noise sources in Cadley Hill Industrial Estate
3
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4
5
7
8
11
12
19
19
20
22
23
Figures
Figure 6-1 – Noise Monitoring Locations
Figure 6-2 - Day-time PPG 24 Noise Exposure Categories
Figure 6-3 – Plan showing Industrial Premises located in the Cadley Hill Industrial Estate
Figure 6-4 – Average noise levels, dB LAeq, for BS 4142 assessment
Figure 6-5 - Average noise levels, dB LAeq for BS 8233 assessment
Figure 6-6 - Maximum noise levels dB LAmax for BS 8233 night-time assessment
Figure 6-7 - Average noise levels, dB LAeq from industrial noise sources with a 3m high noise barrier
Figure 6-8 - Maximum noise levels, dB LAmax with a 3m high noise barrier
18
21
22
24
25
26
27
27
1. Introduction
1.1
Atkins was commissioned by St. Modwen to undertake assessments to support an outline
planning application for a proposed residential development on the land south of the Cadley Hill
Industrial Estate. The results of this assessment were presented in Atkins’ report “Cadley Hill
Residential Development – Noise Impact Assessment” dated September 2011.
1.2
This report provides an update to the information provided in the above mentioned report. It takes
into account updates to the indicative masterplan including an employment area buffer zone
between the Cadley Hill Industrial Estate and proposed residential areas on the development site
and an additional area of residential development to the east of the previously proposed areas.
1.3
This report has been prepared to the scope and approach proposed by the Local Authority
Environmental Health Officer and is based on theoretical conditions. These theoretical conditions
are not supported by Atkins. The approach does not reflect the actual conditions present on the
site as was demonstrated during the noise survey. Furthermore the approach does not reflect
current planning restrictions which mean that such theoretical conditions are unlikely to ever occur.
1.4
There is an existing planning permission to develop the site for industrial use. However, the
current proposal is to develop it as a mixed-use development comprising residential and
employment uses (B1 and B8). This report seeks to quantify noise as it affects the site and
highlight where mitigation may be required to minimise adverse impacts of noise on the proposed
residential areas.
1.5
A noise survey and initial assessment was undertaken between May and September 2011.
Consultation was undertaken with John Mills (Pollution Control Officer) at South Derbyshire
District Council prior to undertaking the survey and assessment to agree approach and
methodology. Further consultation has been undertaken subsequently to assist in determining
appropriate mitigation strategies.
1.6
Since the assessment was undertaken, there have been changes to national planning guidance
which are relevant to this assessment. The National Planning Policy Framework (NPPF) was
produced in March 2012. This guidance revokes and replaces the previous guidance; Planning
Policy Guidance Note 24 “Planning and Noise” (PPG 24). As the original assessment was
undertaken prior to the publication of NPPF, the methodology of of PPG 24 has been retained to
allow a comparison with earlier versions of the report. An outline of the changes to the planning
system and the implications for this assessment is given in Section 0 “Methodology”.
1.7
This report describes:
1.8

Baseline noise measurements undertaken at the site

An assessment of Noise Exposure Category of the site in accordance with PPG 24

An assessment of ‘likelihood of complaints’ due to noise from adjacent industrial noise
sources at the Cadley Hill Industrial Estate

An assessment of internal noise levels in accordance with and BS 8223:1999 ‘Sound
Insulation and Noise Reduction for Buildings – Code of Practice’.
In response to the initial findings of the assessment a number of updates have been made to the
masterplan. The latest version of the indicative masterplan is shown in Appendix G. These
changes are not reflected in the noise contour drawings shown in Appendices E and F although
the areas of the site which would be affected can be identified.
1
2.
Methodology
2.1
This section describes the guidance documents used in undertaking the assessments.
NPPF
2.2
The NPPF published in March 2012 postdates the assessment as reported here and therefore the
methodology of PPG 24 has been retained for the applicable parts of the assessment.
2.3
Other guidance on noise effects which is relevant to both PPG 24 and NPPF has also been
followed (as outlined further on).
2.4
The elements of NPPF relevant to noise are outlined below.
Section 109
“The planning system should contribute to and enhance the natural and local environment by:….

preventing both new and existing development from contributing to or being put at
unacceptable risk from, or being adversely affected by unacceptable levels of soil, air, water
or noise pollution or land instability”.
Section 123
2.5
“Planning policies and decisions should aim to:

avoid noise from giving rise to significant adverse impacts on health and quality of life as a
result of new development;

mitigate and reduce to a minimum other adverse impacts 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 established1; 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.”
2.6
The NPPF does not therefore provide absolute limits on noise that are acceptable or
unacceptable in a given situation. It does however, set out the need to use planning decisions,
including through the use of conditions, to avoid or mitigate adverse impacts on health and quality
of life resulting from noise.
2.7
In order to assess whether noise may give rise to significant, or otherwise, adverse impacts on
health and quality of life, the guidance provided in the World Health Organization (WHO)
Guidelines for Community Noise, BS 8233 and BS 4142 may be appropriate. Details of the
guidance set out in these documents are set out further on in this section.
PPG 24: 1994 (withdrawn March 2012)
2.8
Planning Policy Guidance Note 24 issued in September 1994 entitled “Planning and Noise”
(hereinafter cited as PPG 24) is the main source of guidance in England relating to noise for
planning.
2.9
Its aim is to provide advice on how the planning system can be used to minimise the adverse
impact of noise without placing unreasonable restrictions on development or adding unduly to the
costs and administrative burdens of business.
1
The NPPF contains the caveat “Subject to the provisions of the Environmental Protection Act 1990 and
other relevant law”.
2
2.10
Specifically with regard to new residential developments to be affected by existing transportrelated noise levels, PPG24 introduces the concept of Noise Exposure Categories (NECs). The
guidance gives four NECs, from A to D. The classification of each of these NECs and their
relevance within the decision making process is shown in Table 2-1.
Table 2-1 – Classification of Noise Exposure Categories (NEC)
2.11
NEC
Descriptor
A
Noise need not be considered as a determining factor in granting
planning permission, although the noise level at the high end of the
category should not be regarded as a desirable level.
B
Noise should be taken into account when determining planning
applications and, where appropriate, conditions imposed to ensure
an adequate level of protection against noise.
C
Planning permission should not normally be granted. Where it is
considered that permission should be given, for example because
there are no alternative quieter sites available, conditions should be
imposed to ensure a commensurate level of protection against
noise.
D
Planning permission should normally be refused
Annex 1 of PPG 24 quantifies the NECs and applies them to various different sources of noise.
For ease of reference this table is repeated in Table 2-2.
Table 2-2 – Quantification of Noise Exposure Categories (NEC)
NOISE LEVELS CORRESPONDING TO THE NOISE
EXPOSURE CATEGORIES FOR NEW DWELLINGS LAeq,T dB
NOISE EXPOSURE CATEGORY (NEC)
NOISE SOURCE
A
B
C
D
07:00 – 23:00
<55
55 – 63
63 – 72
>72
23:00 – 07:00
<45
45 – 57
57 – 66
>66
07:00 – 23:00
<55
55 – 66
66 – 74
>74
23:00 – 07:00
<45
45 – 59
59 – 66
>66
07:00 – 23:00
<57
57 – 66
66 – 72
>72
23:00 – 07:00
<48
48 – 57
57 – 66
>66
07:00 – 23:00
<55
55 – 63
63 – 72
>72
23:00 – 07:00
<45
45 – 57
57 – 66
>66
Road Traffic
Rail Traffic
Air Traffic
Mixed Sources
2.12
Any sites where individual noise events regularly exceed 82 dB LAmax (S time weighting) several
times in any hour during the night should be treated as being in NEC C, regardless of the LAeq,8hr
(except where the LAeq,8hr already puts the site in NEC D).
3
2.13
However, paragraph 9 states that “…in some cases it may be appropriate for local planning
authorities to determine the range of noise levels which they wish to attribute to any or each of the
NECs. For example, where there is a clear need for new residential development in an already
noisy area some or all NECs might be increased by up to 3 dB(A) above the recommended levels.
In other cases, a reduction of up to 3 dB(A) may be justified.”
2.14
The noise from commercial developments is considered in Annex 3, where reference is made to
BS 4142 for assessing likelihood of complaints from industrial or commercial developments. BS
4142 has been updated since PPG24 was written; the latest version is explained below and has
been used in this assessment.
BS 4142: 1997
2.15
This British Standard, titled “Method for Rating Industrial Noise Affecting Mixed Residential and
Industrial Areas” is the main source of guidance used in the rating of noise of an industrial nature.
2.16
It is based upon the margin by which noise produced by such a source, after being adjusted for
any tonal characteristics, impulsiveness or irregularity, exceeds the background noise level. The
Standard may be used, within limits, to indicate the likelihood of complaints from local residents.
2.17
A difference of around +10dB or more above measured background noise levels indicates that
complaints are likely. A difference of around +5dB is of marginal significance. If the rating level is
more than 10dB below the measured background noise level dB LA90 then this is a positive
indication that complaints are unlikely.
BS 8233: 1999
2.18
This standard, entitled “Sound Insulation and Noise Reduction for Buildings – Code of Practice”
considers, amongst other matters, appropriate noise levels within various rooms under different
conditions. Included within these is reasonable resting or sleeping conditions for living rooms and
bedrooms. For these two spaces, the following noise levels are recommended:
Table 2-3 – Design Ranges for Noise Levels within Residential Rooms
Room Type
Design Range LAeq,T dB
Good
Reasonable
Living Rooms
30
40
Bedrooms
30
35
2.19
It is also stated that for a reasonable standard in bedrooms at night, individual noise events
should not normally exceed 45 dB LAmax,fast.
2.20
For gardens and balconies, it is desirable that the steady noise levels do not exceed 50 dB LAeq,T
and 55 dB LAeq,T should be regarded as the upper limit.
World Health Organisation (WHO) Guidelines for Community
Noise
2.21
Published by the World Health Organisation (WHO) in 2000, this document has been prepared as
a response to a need for action together with a generic need for improvements in legislation at a
national level.
2.22
Within the document are guideline noise values for noise levels in specific human environments.
The part of the table considered to be relevant in this case is reproduced in Table 2-4 for
reference:
4
Table 2-4 – Extract from WHO ‘Guidelines for Community Noise
dB LAeq
Time
base
[hours]
Serious annoyance, daytime and
evening
55
16
-
Moderate annoyance, daytime
and evening
50
6
-
Dwelling, indoors
Speech intelligibility and
moderate annoyance, daytime
and evening
35
16
-
Inside bedrooms
Sleep disturbance, night-time
30
8
45
Outside bedrooms
Sleep disturbance, window open
(outdoor values)
45
8
60
Specific
Environment
Critical health effect(s)
dB LAmax,
fast
Outdoor Living Area
5
3.
Noise Measurements
3.1
The main source of existing noise affecting the proposed development site at Cadley Hill is
industrial/ commercial noise from the Cadley Hill Industrial Estate. The A444 Burton Road along
the western site boundary affects only the nearest parts of the site to the road.
3.2
The baseline noise environment of the area was determined through a number of attended
sample noise measurements between 5th May and 9th May 2011, to cover different time periods
within a typical weekday and on a Sunday. The noise survey methodology and site-specific
constraints were discussed with the local authority prior to attending the site.
3.3
The site is an open site and the normal practice of using an un-manned continuous noise logger
was not possible, due to security concerns. One of the industrial units on the industrial estate is a
lintel manufacturer, and another a steel stockist. These units store materials outside and, on some
days, activity can be expected in the early hours of the morning during the loading of vehicles for
deliveries. The local authority indicated that one complaint by a neighbouring resident was
regarding noisy activities taking place between 6am and 8am regularly, and noise abatement
action had to be taken against the responsible premises. However it is not known if the abatement
action satisfactorily dealt with this problem.
3.4
The noise monitoring periods were selected to cover both relatively quiet and noisy times of the
day. Noise measurements were taken at 3 measurement locations equally spread across the
proposed development site as shown in Appendix A. The monitoring covered the following
selected periods and comprised non-consecutive 15-minute measurements on a weekday and a
Sunday at each location.

6am and 9am – early morning deliveries and morning peak period

10am and 1pm – off-peak period

1am and 4am – quiet night-time period
3.5
Calibration of the sound level meters, microphones and calibrators used for the survey is
traceable to UKAS accredited laboratories and are within their respective calibration dates.
Furthermore the sound level meters and microphones were calibrated prior to and after the
measurements. No significant drift in calibration was observed.
3.6
All measurements were taken under free-field conditions at a height of 1.5m above ground level.
Windshields were used throughout the noise surveys to minimise turbulence at the microphone.
During the majority of measurements the weather was clear and dry, with some light precipitation
around 6am on the Sunday. The average wind speeds were less than 2 m/s.
6
3.8
A summary of measured noise level data is shown in Table 3-1, which gives an average of the
measured sample noise levels. Full details are given in Appendix B.
Table 3-1 – Summary of Measured Noise Levels
Date
Week-day,
Night
(07:00 – 23:00)
(07:00-23:00)
dB LAeq
dB LA90
dB LAeq
dB LA90
Position 1
50
46
45
33
Position 2
50
45
46
32
Position 3
51
48
43
42
dB LAeq
dB LA90
dB LAeq
dB LA90
Position 1
52
44
43
28
Position 2
50
44
41
28
Position 3
47
43
39
28
5th/6th May 2011
Week-end (Sunday)
8th/9th May 2011
3.9
Day
The site visit and the noise measurements indicated that the proposed development site is in a
reasonably quiet setting, even though it is located adjacent to the Cadley Hill Industrial Estate.
The assessments in the following section are based on the findings of noise measurements
described above.
7
4.
Assessment
4.1
In order to determine the potential impacts on the proposed dwellings, this section describes the
following assessments

PPG 24 assessment to determine the Noise Exposure Category of the site

BS 4142 assessment to determine the ‘likelihood of complaints’ from noise sources of
industrial nature at Cadley Hill Industrial Estate

BS 8233 assessment to determine the suitability of internal noise levels at noise-sensitive
rooms such as bedrooms and living rooms
PPG 24 Noise Exposure Categories
4.2
The overall Noise Exposure Category (NEC) of a site would be governed by the highest of the
day-time and night-time ratings. The NEC categories for mixed noise sources have been used,
since road, air and industrial noise sources contribute to the overall noise level.
Day-time Sample Noise Levels
4.3
Day-time ambient noise levels across the site were measured as 50 to 51 dB LAeq,T during the
week-day and 47 to 52 dB LAeq,T during the week-end. The day-time ambient noise levels during
week-end were observed to be generally similar to the week-day noise levels.
Night-time Sample Noise Levels
4.4
At night, ambient noise levels across the site were measured as 43 to 46 dB LAeq,T during the
week-day and 39 to 43 dB LAeq,T during the week-end. The night-time ambient noise levels dB
LAeq,T during the week-end were 2 to 5 dB(A) lower than the week-day levels.
4.5
Based on average of measured noise levels, the Noise Exposure Categories (NEC) are shown in
Table 4-1
Table 4-1 – Noise Exposure Category at Sample Noise Monitoring Sites
4.6
Sample Monitoring
Site
Day-time Noise
Expose Category
Night-time Noise
Expose Category
Position 1
A
B
Position 2
A
B
Position 3
A
A
The maximum noise levels would not be expected to affect this evaluation since night-time
maximum noise levels were found to be substantially less than 82 dB LAmax.
A444 Burton Road
4.7
It is expected that the parts of the site nearest to A444 Burton Road would be subjected to higher
noise levels.
4.8
The noise levels from the road were calculated using Calculation of Road Traffic Noise, CRTN,
1988 methodology, assuming an annual average week-day 18 hour traffic flow of 15,000, HGV
composition of 16%, and a traffic speed of 40mph. The traffic information was derived from the
Department of Transport database. The calculations were undertaken using NoiseMap SE
software, which implements the calculation procedures described in CRTN. The resulting
calculated noise levels are shown in Appendix C expressed as dB LA10,18hr. These noise levels
can be approximated to dB LAeq,16hr by subtracting 2dB as per the guidance in PPG 24.
8
4.9
It is shown that approximately a 15m wide strip of land facing A444 could be expected to fall into
NEC C, where adequate level of protection against noise would be required by the local authority.
Summary
4.10
The general ambient noise climate would not present a major constraint for the proposed
residential development. The site would mainly fall into NEC A or B both during day-time and
night-time, where noise issues are not considered to be a significant concern. However the
nearest parts of the development to A444 would fall into NEC C where noise issues would need to
be taken into account as part of detailed design. Potential mitigation measures are highlighted
later in this report.
Cadley Hill Industrial Estate
4.11
This section identifies the potential impacts of Cadley Hill Industrial Estate on the proposed
residential development.
4.12
The discussions with the Local Authority indicated that they had concerns with regard to this site
and potential noise issues owing to its proximity to an industrial estate. The Local Authority
advised that both current and any reasonable potential future uses of the industrial estate should
be considered in the noise assessment. The Local Authority recommended assessing/modelling a
worst-case noise scenario from the site, and designing any mitigation measures accordingly. The
assessment would need to consider 24 hour outdoor HGV movements as well as loading and
unloading activities.
Background
4.13
The industrial units within the estate are understood to have various B1 (light industry), B2
(general) and B8 (warehouse) planning consents. The locations and details of various businesses
are shown in Appendix D.
4.14
KH Packaging and Disposables Ltd (ID 1), Empire Process Engineering Ltd (ID 5), Central Joinery
(ID6), PD logistics (ID 7) and Keystone Lintels (ID 8) all have their loading/unloading areas and
yards backing onto the proposed development site. There could be general truck movements at
CRS Trucks (ID 3) and bus movements at Protours Buses (ID 4). In addition a continuously
running extraction system elevated above ground was noted at Central Joinery (ID6) which
dominates the noise levels on the eastern side of the development site.
4.15
Research into past planning permissions at Cadley Hill Industrial Estate has indicated that several
businesses have been granted planning permission with limitations on their hours for deliveries
and/or operation of machinery in recent years. A summary of these is provided below:

Ref: 00/0603 – Erection of factory and offices. Applicant: K&H Packaging and Distribution.
Condition 9 of this permission states that; ‘No machinery to be operated, no process or
deliveries outside of the following hours, and at no times on a Sunday or Bank / Public
Holiday, Monday – Friday 0730 – 1730’.

Ref: 00/1067 – Substitution of plans in permission 00/0603. Condition 10 repeats Condition 9
of permission 00/0603.

Ref: 01/0686 – Erection of two storey office and single storey workshop, ancillary plant.
Applicant: Central Joinery. Condition 9 of this permission states that ‘No operation, process
or delivery it to take place outside of the following hours, and at no time on Sundays or
Bank/Public Holidays, 0730 – 1700 weekdays and Saturdays’.

Ref: 03/0078 – Variation of Condition 9 of permission 01/0686. Applicant: Central Joinery
(Granted 19/03/03). Condition 1 of the permission states that ‘No operation, process or
delivery is to take place outside of the following hours; 0600 to 2200 on weekdays, 0600 to
1730 Saturdays and 0800 to 1600 on Sundays or Bank/Public Holidays’. Condition 2 states
9
that: ‘Permission is for a limited period only, expiring on 31st March 2004, on or before which
date the operating hours shall be restricted to those set out in Condition 9 of 01/0686 unless,
prior to that date, an application has been made and permission granted for an extended
period’.

Ref: 05/0341 - Land adjoining Keystone Lintels, Ryder Close – Erection of a distribution
warehouse and marshalling yard and access – Condition 8 states - ‘No machinery shall be
operated, no process shall be carried out and no deliveries taken at or dispatched from the
site outside the following times nor at any time on Sundays, Bank or Public Holidays: 8am to
6pm Monday to Friday and 8am to 1pm Saturdays

Ref: 05/0637 – Appleby Glade Industrial Estate, Ryder Close - Erection of two storage units
and distribution units. Condition 4 states ‘The building, access and hardstanding shall be
used only between the hours of 0700 and 1800 on Mondays to Fridays and not at all on
weekends or Bank Holidays’

Ref: 06/1126 – UKR Ltd, Ryder Close – Erection of industrial unit. Condition 4 states - No
machinery shall be operated, no process shall be carried out and no deliveries taken at or
dispatched from the site outside the following times nor at any time on Sundays, Bank or
Public Holidays: 07.00 to 18.00 Monday to Saturday.

Ref: 07/1259 – Appleby Glade, Ryder Close – Erection of a block of two industrial units.
Condition 4 states – ‘No deliveries shall be taken or despatched from the site except between
0900 hours and 1800 hours Monday to Saturday. No deliveries shall be taken or despatched
from the site on Sundays or Bank Holidays.

Ref: 07/0708 – UKR Ltd, Ryder Close – Erection of an industrial unit. Condition 4 states - No
machinery shall be operated, no process shall be carried out and no deliveries taken at or
dispatched from the site outside the following times nor at any time on Sundays, Bank or
Public Holidays: 07.00 to 18.00 Monday to Saturday.

Ref: 08/0624 – Central Joinery Ltd, Ryder Close – Erection of four light industrial units.
Condition 4 states – ‘No machinery shall be operated, no process shall be carried out and no
deliveries taken at or dispatched from the site outside the following times nor at any time on
Sundays, Bank or Public Holidays: 08.00 to 18.00 Monday to Friday and 08.00 to 14.00
Saturday.

Ref: 11/0685 – Keystone Lintels Ltd, Ryder Close. Change of use of approx 2.5 ha of
grassland into hard standing for use as a stock yard. Condition 1 states ‘The use of the site
shall not be used for the movement of Lintels or any other product or materials outside the
following times, nor at any time on Sunday, Bank or Public Holidays: 7am to 9pm Monday Friday and 8am to 4pm Saturday. This hours of use restriction shall be for a temporary period
of 24 months only (from the date of this permission), unless otherwise agreed in writing by
the Local Planning Authority. In the absence of any further written agreement prior to the
expiry of the 24 months, the site shall not be used for the movement of Lintels or any other
product or materials outside of the following times: Monday to Friday 8am to 6pm (excluding
public holidays) and Saturday 8am to 1pm.’

Ref: 11/0365 – Ryder Close. Erection of a steel framed industrial unit. Condition 3 states
‘No machinery shall be operated, no process shall be carried out and no deliveries taken or
despatched from the site outside the following times nor at any times on Sundays, Bank or
Public holidays:Monday – Saturday 07:00hrs – 18:00hrs’. Condition 4 states ‘ There shall be
no compressors, generators or other machinery or equipment used within or outside the
building, unless measures for noise attenuation have been implemented in accordance with a
scheme previously submitted to and agreed in writing with the Local Planning Authority. The
approved measures shall thereafter be kept in plcae at all times when any such compressors,
generators or other machinery or equipment are in use’.
10
4.16
This is not an exhaustive list but covers those businesses to the southern boundary of the
industrial estate.
4.17
During the site visits and noise surveys, the level of activity in the estate was observed to be
minimal on a Sunday and no activities were noted during night-time.
Noise Calculations
4.18
The noise levels from Cadley Hill Industrial Estate were calculated using BS 5228-1:2009 ‘Code of
practice for noise and vibration control on construction and open sites’. A 3D noise model was
prepared using the NoiseMap SE software, which implements the calculation procedures
described in the Standard.
4.19
All 8 industrial units adjacent to the proposed development site, including the currently vacant unit
(ID 2), were considered in the assessment. The following source noise levels were assumed at
various industrial units.
Table 4-2 – Assumed source noise levels from units in Cadley Hill Industrial Estate
Source
Unit
Assumed activity
noise level, dB
LAeq,5min at 10m
away
Assumed
maximum noise
level, dB LAFmax
at 10m away
Note
Central
Joinery (ID6)
65
n/a
Based on
measured noise
level at Position 3.
General lorry/
bus movements
All units
65
n/a
Based on data
from previous
similar schemes.
Other noise
events
All units
55
77
Based on
measured noise
level at Position 3
and data from
previous similar
schemes.
Extraction
system
4.20
Some of the activities such as continuously operating fixed plant and general lorry/ bus
movements (start-up, drive past, manoeuvre, engines idling, pulling away) can affect the average
noise levels, dB LAeq. Other activities such as door-closes, reversing bleepers, air brakes, loading
and unloading activities could result in irregular and shorter duration but higher intensity noise
events, which could dominate the maximum noise levels, dB LAFmax. However these are not
expected to contribute to the average noise levels significantly.
4.21
In this assessment, the extraction system at Central Joinery (ID6), potential bangs and clatters
from activities associated with loading activities and reversing bleepers are assumed to represent
‘sources of an industrial nature’ and their impacts are assessed in accordance with BS 4142: 1997.
The impacts of general lorry/ bus movements are assessed as part of BS 8233: 1999. These can
be a source of higher average noise levels, even though they are not typically classified as
‘sources of an industrial nature’.
4.22
The assessed noise levels are without the benefit of any specific mitigation or inherent mitigation
that will be provided by the introduction of buildings onto the site. In particular noise levels at
residential properties screened by employment buildings or other residential properties would be
expected to be lower.
4.23
The results are illustrated in Appendix E as follows, together with a description of the noise
sources assumed in each calculation.
11
4.24

Figure 7-4 – Average noise levels, dB LAeq for BS 4142 assessment

Figure 7-5 – Average noise levels, dB LAeq for BS 8233 assessment

Figure 7-6 – Maximum noise levels dB LAmax for BS 8233 night-time assessment
It should be noted that the calculations represent a worst case scenario, when all 8 industrial units
adjacent to the proposed development site would generate a similar level of activity at the same
time as each other. It is assumed that the same level of activity could occur during both day-time
and night-time. The site visit and measured noise levels indicated that the level of activity and the
generated noise levels are likely to be less in practice. Furthermore for this situation to occur at
night, the employment uses would be operating outside of the current planning controls on
existing permissions.
BS 4142 Assessment
4.25
The following is an assessment, in accordance with BS4142 methodology, which involves the
comparison of the commercial/ industrial noise, appropriately corrected for any distinct character,
with the existing background level.
4.26
The acoustic characteristics of the fixed mechanical plant, bangs and clutters from activities
associated with loading activities, reversing bleepers are expected to contain clearly audible tonal
elements which could be significantly different from that of the existing ambient noise. Therefore a
+5dB distinct character correction is assumed as part of this assessment in determining rating
noise levels.
4.27
The lowest background noise levels during day-time were measured as 45 dB LA90 during the
week-day and 43 dB LA90 during week-end. The lowest background noise levels during night-time
were measured as 32 dB LA90 during the week-day and 28 dB LA90 during week-end.
4.28
Using the information described above, an indicative BS 4142 assessment is shown in Table 4-3
for day and night. The assessment is based on the range of calculated noise levels (see
Appendix E, Figure 7-4) which would affect the proposed residential areas of the site as shown
on the indicative masterplan in Appendix G. Areas that would be employment use have not been
considered.
Table 4-3 – Indicative BS 4142 calculation – No Mitigation
BS 4142 calculation step
Noise level or correction
Week-day
‘Specific noise level’, dB LAeq,T at
proposed dwellings
‘Acoustic feature correction’, dB(A)
‘Rating level’, dB LAr,Tr at the
nearest residential property
Measured background noise level,
dB LA90,T in study area
‘Excess of rating level over
background noise level’, dB(A)
4.29
Week-end
Day-time
Night
Day-time
Night
35 - 45
35 - 45
35 - 45
35 - 45
+5
+5
+5
+5
40 - 50
40 - 50
40 - 50
40 - 50
45
32
43
28
-5 to +5
+8 to +18
-3 to +7
+12 to + 22
As part of a BS 4142 assessment, where the ‘excess of rating level over background noise level’
is shown as -10 dB, this is ‘a positive indication that complaints are unlikely’. Where ‘excess of
rating level over background noise level’ is shown as +5, this is a ‘marginal significance’ and a
difference of around +10dB or more indicates that ‘complaints are likely’.
12
4.30
The lower end of the predicted range of noise levels (35 dB LAeq) is applicable, as a maximum, to
the vast majority of the site proposed for residential development as shown on the indicative
masterplan in Appendix G. The highest levels of 45 dB LAeq,T are only predicted to affect a small
number of proposed properties shown in the north-eastern corner of the indicative masterplan
which are most exposed to noise from the extraction fan at Central Joinery (ID 6). A larger part of
this area is exposed to noise levels of up to 40 dB LAeq,T.
4.31
The BS 4142 assessment shows that, based on a worst case assessment where all of the units at
Cadley Hill Industrial Estate are in operation during the night, complaints would be likely. During
the day-time, the impacts would range from less than of ‘marginal significance’ to more than of
‘marginal significance’ on a week-end day-time. As stated, this assessment is based on worst
case impacts. The site visits and noise surveys indicated that currently there are no significant
activities during night-time. During the day, it is unlikely that all 8 units, including the vacant unit,
would have the assumed level of activity at the same time.
4.32
The assessment above is based on the currently measured noise levels in absence of the
development. The background noise levels with the development could be higher, due to
increased noise from road traffic sources on local roads. This may have an effect of limiting the
potential impacts.
BS 8223
4.33
The potential impacts of lorry movements within the loading/ unloading areas and yards backing
onto the proposed development site are also assessed using BS 8223. The calculated noise
levels are shown in Appendix E, Figure 7-5 and Figure 7-6.

4.34
the noise levels in gardens and balconies would meet the BS 8223 requirements of 50 to 55
dB LAeq.
If all 8 industrial units at Cadley Hill Industrial Estate adjacent to the proposed development site,
including the currently vacant unit (ID 2), were operational at night (this is an unlikely situation and
would be contrary to existing conditions and would breach existing planning restrictions).

the noise levels inside the bedrooms of properties facing Cadley Hill Industrial Estate would
meet the BS 8223 requirements of 30 to 35 dB LAeq with the windows open.

the noise levels inside the living rooms of properties facing Cadley Hill Industrial Estate would
meet the BS 8223 requirements of 30 to 40 dB LAeq with the windows open.

the individual noise events in bedrooms at night are not predicted to exceed the BS 8223
internal criteria of 45 dB LAmax, or an equivalent 60 dB LAmax outside at the vast majority of the
area of the site proposed for residential development. Exceedances of up to 5dB are
predicted, however, in the north-eastern part of the site nearest to Central Joinery (ID6) and
PD Logistics (ID7).
Summary
4.35
The assessment showed that;

During day-time, the impacts in accordance with BS 4142 would be less than of ‘marginal
significance’ at the vast majority of proposed locations for residential development as shown
on the indicative masterplan in Appendix G.

If all units at Cadley Hill Industrial Estate were in operation during the night, complaints would
be likely, when assessed in accordance with BS 4142.

The average internal noise levels dB LAeq due to lorry/bus movements would meet the design
ranges set out in BS 8233 for bedrooms and living rooms with the windows open.
13

4.36
At all but a few of the residential properties as shown on the indicative masterplan, the
maximum internal noise levels dB LAmax would not exceed the design range set out in BS
8233 for bedrooms at night. At a few properties nearest to the site boundary, the BS 8233
design target for maximum noise levels is predicted to be exceeded by up to 5 dB(A).
This is a worst-case assessment since it was assumed that;

the industrial units could be operational at night, even though currently there are no
significant activities at night and such activities would be contrary to current planning
condition restrictions.

all 8 units adjacent to the site, including the vacant unit, would have the same assumed level
of activity and could operate at the same time which is again an unlikely scenario.
4.37
The site visit, measured noise levels and current planning restrictions indicate that the level of
activity and the generated noise levels are significantly less in practice.
4.38
Potential mitigation measures are identified in the next section.
14
5.
Mitigation
5.1
The main impacts at the proposed development site would be from Cadley Hill Industrial Estate
and A444 Burton Road.
5.2
The following strategies have been included in the indicative masterplan to minimise the noise
impacts from these sources:
A444 Burton Road
5.3
In order to ensure that no part of the development is in Noise Exposure Category C, a buffer zone
of around 15m has been included between the A444 Burton Road and the proposed dwellings.
5.4
The extent of the site which is in NEC C is shown in Appendix C. This corresponds to noise
levels of 63 dB LAeq,16hr (equivalent of 65 dB LA10,18hr) or higher i.e. yellow or higher noise bands in
noise contour map.
Cadley Hill Industrial Estate
5.5
During the day-time, the average internal noise levels dB LAeq would meet the design ranges set
out in BS 8233 for bedrooms and living rooms with the windows open. The impacts in accordance
with BS 4142 would be less than of ‘marginal significance’ at all but a small area of proposed
residential development close to the site boundary near Central Joinery (ID6).
5.6
In order to ensure impacts from the extraction system at Central Joinery (ID6) and noise from
general lorry movements are kept to a minimum at residential receptors, an employment buffer
zone has been incorporated into the indicative masterplan. The employment zone is proposed for
employment units of B1 and B8 class. The noise sensitivity of these proposed uses would be low;
although any offices should be designed to provide a suitable internal acoustic environment taking
into account the external noise levels and the façade glazing and ventilation strategy.
5.7
Furthermore a 3m high noise barrier is proposed along the northern and north eastern edge of the
site, between Cadley Hill Industrial Estate and the residential development (predominantly to
mitigate night-time noise impacts).
5.8
Calculated noise levels with a 3m high barrier are shown in Appendix F; Figure 7-7 and Figure
7-8.
5.9
Figure 7-7 shows the average noise levels in dB LAeq from industrial noise sources (for BS 4142
assessment).
5.10
Figure 7-8 shows the predicted maximum noise levels (dB LAmax) in order to assess the likelihood
of a regular exceedance of the BS 8233 maximum noise level criterion of 45 dB LAmax in
bedrooms at night.
5.11
With a 3m high noise barrier, no noise levels are predicted to exceed 40 dB LAeq,T at the locations
of the proposed residential areas of the site which will ensure that all day-time noise impacts are
predicted to be of less than ‘marginal significance’ as per BS 4142.
5.12
The noise barrier will also ensure that the LAmax noise levels at night will be below 60 dB LAmax at
all locations, thus meaning that the BS 8233 criterion of 45 dB LAmax will not be exceeded inside
bedrooms at night.
5.13
At night-time, noise levels of 40 dB LAeq,T which are predicted at the properties in the eastern strip
of the site nearest to Central Joinery (ID 6) would still result in a BS 4142 impact assessment of
+13 dB (weeknight) or +17 dB (weekend night-time) indicating that complaints are likely. This is
based on a worst-case assessment assuming that all of the industrial units are fully operational at
15
night which has already been explained to be contrary to existing planning restrictions and is
unlikely to occur.
5.14
The primary cause of the higher noise levels predicted in the eastern area of the site is the
extraction vent at Central Joinery which is elevated at some height above the ground and hence is
not effectively attenuated by the proposed noise barrier.
5.15
It should be noted that planning permissions Refs 01/0686, 03/0078 and 08/0624, as referred to
above in paragraph 4.15, would indicate that Central Joinery do not currently have permission to
operate machinery during night-time hours.
5.16
Alternative mitigation strategies could also be considered to minimise impacts from the vent if
these were deemed necessary, even given consideration to the Central Joinery planning condition
restrictions. This could include careful orientation and layout of the proposed dwellings and
suitable specification of ventilation to avoid the need for opening windows where necessary.
When built, the proposed development itself would act as a noise barrier between Cadley Hill
Industrial Estate and the existing residential properties adjacent to the A444. This would minimise
potential impacts from Cadley Hill Industrial Estate.
6.
Other Considerations
6.1
It is intended that the employment zone will comprise of non-noise producing uses in order to
provide a buffer between noise producers at Cadley Hill Industrial Estate and the proposed
residential areas. Conditions will therefore need to be imposed to ensure that noise from this area
of the development does not constitute a nuisance at the neighbouring residential area.
6.2
Attention should also be paid to access routes through the development site to the employment
areas to minimize noise impacts at residential receptors.
7.
Conclusions
7.1
Appropriate noise assessments have been undertaken, to identify any constraints on the land
south of the Cadley Hill Industrial Estate for residential land use.
7.2
The Local Authority advised that both current and any reasonable potential future uses of the
industrial estate should be considered in the noise assessment. The Local Authority
recommended assessing/modelling a worst-case noise scenario from the site, and designing any
mitigation measures accordingly. The assessment would need to consider 24 hour outdoor HGV
movements as well as loading and unloading activities.
7.3
The findings are summarised below:
PPG 24 Noise Exposure Category
7.4
The general ambient noise climate would not present a major constraint for the proposed
residential development. The site would mainly fall into NEC A or B both during day-time and
night-time, where noise issues are not considered to be a significant concern. However the
nearest parts of the development to A444 would fall into NEC C.
7.5
In order to ensure that no part of the development is in Noise Exposure Category C, a buffer zone,
approximately 15m wide, is proposed between A444 Burton Road and the proposed dwellings.
Typical Day-time Operations - Cadley Hill Industrial Estate
7.6
This assessment represents a typical current operation of the Cadley Hill Industrial Estate,
including the early morning deliveries during the week.
16
7.7
During day-time, the average internal noise levels dB LAeq in residential properties would meet the
design ranges set out in BS 8233 for bedrooms and living rooms with the windows open. The
impacts in accordance with BS 4142 would be less than of ‘marginal significance’ when assessed
with the benefit of a 3m high noise barrier around the northern and north-eastern site boundary.
Night-time Operations - Cadley Hill Industrial Estate
7.8
This assessment follows Local Authority recommendation that the assessment should be based
on worst-case scenario. It is intended to represent a potential future use of the Cadley Hill
Industrial Estate and assumes that;

the industrial units could be operational at night, even though currently there are no
significant activities at night and existing planning conditions restrict hours of operation;

all 8 units adjacent to the site, including the vacant unit, would have the same assumed level
of activity and could operate at the same time. The site visit, measured noise levels indicated
and planning restrictions that the level of activity and the generated noise levels are
significantly less in practice.
7.9
If all units at Cadley Hill Industrial Estate were in operation during the night, complaints would be
likely, when assessed in accordance with BS 4142.
7.10
Taking into account the benefit provided by a 3m high noise barrier, the individual noise events in
bedrooms at night are not predicted to exceed the BS 8223 night-time criterion of 45 dB LAmaxor
an equivalent 60 dB LAmax outside.
Overall
7.11
The site is suitable for residential development even against the local authority’s unrealistic worst
case scenario provided that:

the identified buffer zones and noise barriers to provide protection from the A444 and the
Cadley Hill Industrial Estate are incorporated into the detailed design of the development;
and;

consideration is given to the design and layout of the development, if deemed necessary, in
respect of the eastern strip of the site currently shown to experience noise levels of up to 40
dB LAeq,T in Figure 6.7 of Appendix F.
17
Appendices
A.
Measurement Positions
Figure 7-1 – Noise Monitoring Locations
18
B.
Measured Noise Levels
Table 7-1 – Measured noise levels at Position 1
Date/ Time
(2011/05/05 06:06:54.00)
(2011/05/05 07:06:06.00)
(2011/05/05 08:10:01.00)
(2011/05/05 10:11:02.00)
(2011/05/05 11:08:37.00)
(2011/05/05 12:05:46.00)
(2011/05/06 01:02:42.00)
(2011/05/06 02:02:59.00)
(2011/05/06 03:03:34.00)
(2011/05/08 06:02:38.00)
(2011/05/08 06:59:02.00)
(2011/05/08 07:54:31.00)
(2011/05/08 10:00:01.00)
(2011/05/08 10:54:54.00)
(2011/05/08 11:50:12.00)
(2011/05/09 00:00:10.00)
(2011/05/09 00:59:11.00)
(2011/05/09 02:03:50.00)
dB LAeq
dB LAF(max)
dB LA1
dB LA10
dB LA90
48.6
50.3
51.1
50.4
50.3
49.3
38.5
43.4
44.1
46.1
46.7
49.1
52.6
53.9
54.0
44.1
38.2
37.4
58.1
61.0
67.4
67.6
65.1
63.7
54.9
60.4
63.2
64.5
60.8
63.8
63.0
65.3
69.1
66.8
60.2
66.3
53.6
56.3
55.8
56.5
57.9
55.1
48.4
55.3
54.6
56.1
54.9
58.5
59.0
59.9
60.1
55.2
50.3
48.8
51.3
52.8
53.2
53.2
52.5
52.0
42.5
46.9
47.2
50.3
50.6
52.5
55.9
56.9
56.6
47.4
40.2
39.1
44.4
46.0
47.4
45.2
46.3
44.0
27.1
28.7
30.2
35.0
37.2
39.3
45.6
48.2
49.1
30.1
24.2
23.2
Table 7-2- Measured noise levels at Position 2
Date/ Time
(2011/05/05 06:25:11.00)
(2011/05/05 07:25:05.00)
(2011/05/05 08:27:52.00)
(2011/05/05 10:29:14.00)
(2011/05/05 11:26:28.00)
(2011/05/05 12:23:42.00)
(2011/05/06 01:21:44.00)
(2011/05/06 02:21:33.00)
(2011/05/06 03:22:45.00)
(2011/05/08 06:20:30.00)
(2011/05/08 07:16:31.00)
(2011/05/08 08:15:26.00)
(2011/05/08 10:17:20.00)
(2011/05/08 11:12:15.00)
(2011/05/08 12:07:54.00)
(2011/05/09 00:18:38.00)
(2011/05/09 01:17:11.00)
(2011/05/09 02:21:20.00)
dB LAeq
dB LAF(max)
dB LA1
dB LA10
dB LA90
45.4
47.4
48.5
54.1
48.4
48.0
36.4
49.8
40.9
44.8
43.3
46.4
51.3
52.3
49.8
36.6
40.7
34.3
56.6
58.5
66.9
73.4
65.0
61.5
52.4
70.3
58.4
59.1
64.4
59.5
68.2
69.0
68.6
53.5
56.4
50.9
52.0
52.2
54.8
67.9
56.0
56.2
45.5
65.1
53.6
54.0
51.3
53.7
58.2
59.3
56.8
45.9
48.5
44.9
47.5
48.9
50.5
52.5
50.2
51.1
40.0
46.4
42.3
48.5
45.9
49.3
53.5
54.7
52.1
40.5
46.2
37.5
42.2
45.2
45.6
45.8
45.2
43.4
29.2
29.1
29.1
36.1
37.2
40.8
47.3
47.0
46.1
26.1
24.3
24.7
19
Table 7-3 - Measured noise levels at Position 3
Date/ Time
(2011/05/05 06:44:20.00)
(2011/05/05 07:44:53.00)
(2011/05/05 08:46:33.00)
(2011/05/05 10:48:31.00)
(2011/05/05 11:44:51.00)
(2011/05/05 12:42:16.00)
(2011/05/06 01:41:09.00)
(2011/05/06 02:40:28.00)
(2011/05/06 03:41:36.00)
(2011/05/08 06:39:06.00)
(2011/05/08 07:34:47.00)
(2011/05/08 08:33:13.00)
(2011/05/08 10:35:12.00)
(2011/05/08 11:30:01.00)
(2011/05/08 12:25:51.00)
(2011/05/09 00:37:52.00)
(2011/05/09 01:37:12.00)
(2011/05/09 02:39:24.00)
dB LAeq
dB LAF(max)
dB LA1
dB LA10
dB LA90
48.8
50.1
51.7
51.5
50.7
52.4
36.4
34.7
35.7
43.7
42.8
45.0
49.7
48.0
48.0
33.6
33.0
30.9
53.1
64.6
71.1
67.0
62.5
69.2
54.3
54.2
54.9
62.2
59.9
64.7
62.8
64.3
62.4
55.8
53.5
50.0
51.6
54.9
57.6
60.4
54.7
65.1
45.7
44.5
44.6
53.7
49.3
51.5
55.1
53.3
53.2
44.9
43.7
42.7
49.9
51.5
52.5
52.3
52.0
51.0
40.3
37.5
39.5
46.1
45.5
47.6
51.4
49.5
49.6
35.7
34.8
33.7
47.5
48.1
49.4
48.7
49.1
43.7
27.7
26.9
26.6
37.1
38.2
40.2
46.7
45.8
45.4
24.7
25.7
22.6
20
C.
PPG 24 Noise Exposure Categories for
the site
The following noise contour map represents the day-time Noise Exposure Category for the
proposed development site. Areas shown in;

dark-blue are in NEC A

light-blue are in NEC B

yellow are in NEC C

red are in NEC D
Figure 7-2 - Day-time PPG 24 Noise Exposure Categories
21
D.
Businesses in Cadley Industrial Estate
Figure 7-3 – Plan showing Industrial Premises located in the Cadley Hill Industrial Estate
Table 7-4 – List of Industrial Premises located in the Cadley Hill Industrial Estate
No.
1
2
3
4
5
6
7
8
9
10
11
12
Company
KH Packaging & Disposables Ltd
For Sale
CRS Trucks
Protours Buses
Empire Process Engineering Ltd
Central Joinery
PD Logistics
Keystone Lintels (keylife roof windows)
Various Units
Colomber Wine
Trelleborg Sealing Solutions
A.W. Allen Steelstock
22
Table 7-5 – Potential noise sources in Cadley Hill Industrial Estate
No.
Company
Sources of Noise
1
KH Packaging & Disposables Ltd
Trucks in loading/unloading area
2
3
Unoccupied and for sale
CRS Trucks
Large yard area so maybe forklift trucks and loading/unloading activities
Sales yard - Truck movements
4
Protours Buses
Bus movements, bus washing facility and maintenance building
5
Empire Process Engineering Ltd
6
Central Joinery
7
8
9
10
11
12
PD Logistics
Keystone Lintels (keylife roof windows)
Various Units
Colomber Wine
Trelleborg Sealing Solutions
A.W. Allen Steelstock
None observed though likely to be loading/unloading area
Very noisy and distinctive plant – possibly an extraction system.
Loading/unloading & storage area
Truck Movements
Large yard area with several forklift trucks
Vehicles movements, banging from some units
No noisy activities observed
Lots of fans, outlets on roof but couldn't hear anything particular
Truck and forklift movements
23
E.
Impacts from Cadley Hill Industrial
Estate
Figure 7-4 shows the calculated average noise levels, in dB LAeq, from the extraction system at
Central Joinery (ID6), potential bangs and clutters from activities associated with loading
activities and reversing bleepers. The calculated noise levels are used in the assessments
carried out in accordance with BS 4142. No part of the development should be exposed to noise
levels greater than 40 dB LAeq (i.e. dark green or higher noise bands in noise contour map).
Figure 7-4 – Average noise levels, dB LAeq, for BS 4142 assessment
24
Figure 7-5 shows the calculated average noise levels, in dB LAeq, from general lorry/ bus
movements. The calculated noise levels are used in the assessments carried out in accordance
with BS 8233. No part of development should be exposed to noise levels greater than 45 dB
LAeq (i.e. yellow or higher noise bands in noise contour map).
Figure 7-5 - Average noise levels, dB LAeq for BS 8233 assessment
25
Figure 7-6 shows the calculated maximum noise levels, in dB LAmax, from potential bangs and
clatters from activities associated with loading activities and reversing bleepers. The calculated
noise levels are used in the night-time assessments carried out in accordance with BS 8233.
LAmax
Figure 7-6 - Maximum noise levels dB LAmax for BS 8233 night-time assessment
26
F.
Noise levels with mitigation measures
The outline location of the proposed 3m high noise barrier to the north and north-east of the site
perimeter is shown as a thick black line.
Figure 7-7 - Average noise levels, dB LAeq from industrial noise sources with a 3m high
noise barrier
LAmax
Figure 7-8 - Maximum noise levels, dB LAmax with a 3m high noise barrier
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G.
Indicative Masterplan
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Atkins Acoustics Noise and Vibration
6th Floor West
The Axis
Birmingham
B1 1TF
Telephone: 0121 483 5000
Direct telephone: 0121 483 5833
Fax: 0121 483 5858
© Atkins Ltd except where stated otherwise.
The Atkins logo, ‘Carbon Critical Design’ and the strapline
‘Plan Design Enable’ are trademarks of Atkins Ltd.
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