APPENDIX 5 NOISE ASSESSMENT 77 14/07/2017

Headon Camp Industrial Estate, Headon, Retford, Nottinghamshire.

Planning Statement Appendices.

HC/0738/5

APPENDIX 5

NOISE ASSESSMENT

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www.wyg.com creative minds safe hands

Waste to Energy Assests Ltd

Proposed Drying/Processing of Wood &

Waste Materials to Provide a Range of

Fuel Products at Headon Camp

Industrial Estate, Retford,

Nottinghamshire

Noise Assessment

July 2017

Executive Park, Avalon Way, Anstey, Leicester, LE7 7GR

Tel: +44 (0)116 234 8000

Email: [email protected]

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mailto:[email protected]


Document Control

Project: Proposed Drying/Processing of Wood & Waste Materials to Provide a Range of

Fuel Products at Headon Camp Industrial Estate, Retford, Nottinghamshire

Client: Waste to Energy Assets Ltd

Job Number: A102068

File Origin: O:\Acoustics Air Quality and Noise\Fee Earning Projects\A102068

Document Checking:

Prepared by: Graham Davis AMIOA

Senior Consultant, Environmental Scientist Initials: GD

Contributor: Rebecca Jeffs

Consultant, Environmental Scientist Initials: RJ

Verified by: Nigel Mann MIOA

Director, Environmental Scientist Initials: NM

Issue Date Status

1 26th June 2017 First Issue

2 5th July 2017 Second Issue – Minor Amendments

3

4

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Contents Page

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

2.0 Assessment Criteria ....................................................................................................................... 5

3.0 Assessment Methodology .............................................................................................................. 6

4.0 Noise Survey .............................................................................................................................. 10

5.0 Assessment of Key Effects ........................................................................................................... 13

6.0 Conclusions of Noise Assessment .................................................................................................... 16

Appendix Contents

Appendix A – Acoustic Terminology and Abbreviations

Appendix B – Sketches

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Noise Assessment

Waste to Energy Assets Ltd 2 A102068

Headon Camp, Retford July 2017

1.0 Introduction

1.1 Purpose of this Report

This report presents the findings of a noise assessment undertaken for the industrial drying of imported

wood and waste materials to produce various fuel products, including dried, split logs, woodchip and

woodchip briquettes at Headon Camp Industrial Estate, Retford, Nottinghamshire. The plant associated

with the process provides heating to the log and chip drying facility; the following noise sources have been

included within the assessment:

• 132 No. Angus Orlan Super 130 kW housed within the existing northern building

• 9 No. Angus Orlan Super 60 kW housed within the existing northern building

• 21 No. Angus Orlan Super 130 kW housed within the existing southern building

• 2 No. Angus Orlan Super 500 kW housed within the existing southern building

• 1 No. Wood Shredder (based upon AK 510 K)

• 20 No. Heat Exchange Fans and associated ducting

• 3 No. Aggreko Generators

• Waster sorting and screening

• Deliveries of materials

A description of the existing noise environment in and around the site is provided. Noise surveys have

been undertaken and the results used to verify predictions of the short-term and long-term effects of noise.

The noise levels from the proposed development have been predicted based on noise measurements at

local representative receptors using CADNA noise modelling software which incorporates ISO 9613

methodologies and calculations.

A list of acoustic terminology and abbreviations used in this report is provided in Appendix A and sketches

as visual aids to the assessment are presented in Appendix B.

1.2 Legislative Context (England)

This report is intended to provide information relevant to the local planning authority and their consultees

in support of a planning application for the above proposed development. Policy guidance with respect to

noise is found in National Planning Policy Framework (NPPF). With regard to noise and planning, NPPF

contains the following 4 short statements (section 123):

▪ Avoid noise from giving rise to significant adverse impacts on health and quality of life as a

result of new development;

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▪ 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 established; 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.

In support of the NPPF, Planning Practice Guidance (PPG): Noise was launched in March 2014. The overall

aim of this guidance is tying in with the principles of the NPPF and the Explanatory Note of the Noise Policy

Statement for England (NPSE), which states, 'identify whether the overall effect of noise exposure is, or

would be, above or below the significant observed adverse effect level and the lowest observed adverse

effect level for the given situation.’

A summary of the effects of noise exposure associated with both noise generating developments and noise

sensitive developments is presented within the PPG and repeated as follows:

Table 1.1 Noise Exposure Hierarchy

Perception Examples of Outcomes Increasing Effect Level Action

Not noticeable No Effect No Observed Effect No Specific Measures

Required

Noticeable and not intrusive

Noise can be heard, but does not cause any change in behaviour or attitude. Can slightly affect the acoustic character of the area but not such that there is a perceived change in the quality of life.

No Observed Adverse Effect No Specific Measures

Required

Lowest Observed Adverse Effect Level

Noticeable and intrusive

Noise can be heard and causes small changes in behaviour and/or attitude, e.g. turning up volume of television; speaking more loudly; closing windows

for some of the time because of the noise. Potential for non-awakening sleep disturbance. Affects the acoustic character of the area such that there is a

perceived change in the quality of life.

Observed Adverse Effect Mitigate and reduce to

a minimum

Significant Observed Adverse Effect Level

Noticeable and disruptive

The noise causes a material change in behaviour and/or attitude, e.g. having to keep windows closed most of the time, avoiding certain activities during

periods of intrusion. Potential for sleep disturbance resulting in difficulty in getting to sleep, premature awakening and difficulty in getting back to sleep.

Quality of life diminished due to change in acoustic character of the area.

Significant Observed Adverse Effect

Avoid

Noticeable and very disruptive

Extensive and regular changes in behaviour and/or an inability to mitigate effect of noise leading to psychological stress or physiological effects, e.g.

regular sleep deprivation/awakening; loss of appetite, significant, medically definable harm, e.g.

auditory and non-auditory

Unacceptable Observed Adverse Effect

Prevent

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The NPPF, NPSE and PPG: Noise do not, however, present absolute noise level criteria which define SOAEL,

LOAEL and NOEL which is applicable to all sources of noise in all situations. Therefore, within the context

of the Proposed Development, national planning policy and appropriate guidance documents, including the

‘BS 4142 – ‘Methods for rating and assessing industrial and commercial sound’ (2014), Section 2.0 presents

the noise level criteria used as a basis of this assessment.

The PPG: Noise also states that neither the NPSE nor the NPPF (which reflects the Noise Policy Statement)

expects noise to be considered in isolation, separately from the economic, social and other environmental

dimensions of the proposed development.

1.3 Acoustic Consultants’ Qualifications, Professional Membership

The lead project Acoustic Consultant is Graham Davis. The report has been checked and verified by Nigel

Mann. Relevant qualifications, membership and experience are summarised below.

Name Education

Institute of Acoustics

Post Graduate Diploma in

Acoustic and Noise Control (Pass Date)

Experience in Undertaking Noise

Assessments (Start date of

working in noise & acoustics)

Attained Associate Membership of the


(date)

Attained Membership of the


(date)

Rebecca Jeffs

BSc (2016) - May 2016 - -

Graham Davis

BA (2008) Nov 2013 Sep 2011 Jan 2014 -

Nigel Mann Bsc, (1997) Msc (1999)

Nov 2001 Nov 1998 Nov 2001 Jul 2005

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2.0 Assessment Criteria

In order to enable the assessment of the proposed development in terms of LOAEL and SOAEL, Table 2.1

presents equivalent noise levels and associated actions with the target noise level criteria identified. The

noise level criteria detailed below have been derived from standards and design guidance including:

BS 4142:2014, ‘Methods for rating and assessing industrial and commercial sound’

BS 8233:2014 – ‘Guidance on Sound Insulation and Noise Reduction for Buildings’

Table 2.1 Noise Level Criteria and Actions

Effect Level Noise Level Criteria Action / Justification

No Observed Adverse Effect

Noise Rating Level (LAeq,T) is 10 dB below background noise level (LA90,T)

Action: None

Justification: BS 4142 (2014) indication of low impact

Internal noise levels below (with windows open):

Bedrooms (night-time) – 30 dBLAeq,8hours

Living Rooms (daytime) – 35 dBLAeq,16hours

Action: None Justification: Within BS 8233 criteria

Lowest Observed Adverse Effect Level

(LOAEL)

Noise Rating Level (LAeq,T) between 0 – 5 dB above the

background noise level (LA90,T). LOAEL is equivalent to

background noise level.

Action: None Justification: BS 4142 (2014) indication of low impact, depending on the context in which it

occurs.

Internal noise levels achieve (with windows open):



Action: None Justification: Within BS 8233 criteria

Significant Observed Adverse Effect Level

(SOAEL)

Noise Rating Level (LAeq,T) 10 dB or greater above the background noise level (LA90,T).

Action: Reduce as far as practicable depending

on context

Justification: BS 4142 (2014) indication of an adverse impact depending on the context in

which it occurs.

Internal noise levels exceed (with windows closed):



Action: Mitigate Justification: Exceeds BS 8233 criteria

Unacceptable Observed Adverse

Effect Level (UOAEL)

Noise Rating Level (LAeq,T) 15 dB or greater above the background noise level (LA90,T).

Action: Reduce as far as practicable depending

on context

Justification: BS 4142 (2014) indication of significant adverse impact is 10 dB above

background depending on the context in which it occurs.

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3.0 Assessment Methodology

3.1 Noise Modelling Methodology

Three-dimensional noise modelling was undertaken which was based on the monitoring data to predict

source noise levels at a large number of locations both horizontally and vertically. CADNA noise modelling

software has been used. This model is based on ISO 9613 noise propagation methodology. The modelling

software calculates noise levels based on the emission parameters and spatial settings that are entered.

Input data, assumptions and model settings as given in the table below have been used.

Table 3.1 Modelling Parameters Sources and Assumptions

Parameter Source Details

Horizontal distances – around site

Ordnance Survey Ordnance Survey

Ground levels Site Observations and Ordnance Survey

OS panorama contours.

Building heights – around site WYG Observations 8 m height for two storey properties and 4 m for one storey

Barrier heights WYG Observations None included within model.

Receptor positions WYG 1 m from façade, height of 1.5m (day) and 4 m (Night). 4 m height for model grid.

Absorbent Ground CADNA Frequency dependant ground absorption has been applied based on values specified in VDI 2714/16 clause 6.3.

Proposed Plans Hughes Craven Drawing Name: Site Layout. Drawing No. 0738-5-8. Revision: F Date: 28/06/2017

It is acknowledged that a number of these assumptions will affect the overall noise levels presented in this

report. However, it should be noted that certain assumptions made, as identified above, are worst case.

3.2 Model Input Data

3.2.1 Internal Plant Noise Data

In order to represent noise from internally located boilers, reverberant noise levels have been calculated

using the following manufacturer’s data:

Northern Building

• 132 No. Angus Orlan Super 130 kW housed within the existing building - 60 dBA at 1m


Southern Building


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Vertical area sources have been defined in the model to represent noise break-out from within the

processing areas. The acoustic performance of the housing of the boilers and processing areas is not

known, however a conservative reduction of Rw 20 dB has been included within the model to account for

the single-skin enclosure and acoustic weaknesses such as vents and door seals. For the purposes of this

worst-case assessment, all sources are considered to be operating at full capacity at all times.

Table 3.2 Northern Building: Processing Areas Noise Input Data

BSP Unit Ecoangus Wood Burners (130 kw) Ecoangus Wood Burners (60 kw)

Length 86.0 86.0

Width 33.0 33.0

Height 8.0 8.0

RT 4.8 4.8

r distance from source to nearest internal facade

5.0 5.0

Q Directivity 4.0 4.0

Lw 65.0 65.0

Volume of Space 22704.0 22704.0

Surface Areas 7580.0 7580.0

A Total Absorption 758.0 758.0

Alpha bar 0.1 0.1

Rc Room Constant 842.2 842.2

SPL 47.0 47.0

Calculated Reverberant SPL Based on Number of Sources

68.1 57.4

Total Internal Reverberant Noise Level 68.7 dBA

Table 3.3 Southern Building: Processing Areas Noise Input Data


Length 86.0 86.0

Width 33.0 33.0

Height 8.0 8.0

RT 4.8 4.8

r distance from source to nearest internal facade

5.0 5.0

Q Directivity 4.0 4.0

Lw 65.0 65.0

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Volume of Space 22704.0 22704.0

Surface Areas 7580.0 7580.0

A Total Absorption 758.0 758.0

Alpha bar 0.1 0.1

Rc Room Constant 842.2 842.2

SPL 47.0 47.0

Calculated Reverberant SPL Based on Number of Sources

60.2 50.0

Total Internal Reverberant Noise Level 60.6 dBA

3.2.2 External Plant Noise Data

The following model input data has been used to represent externally located items of plant, including

generators and heat exchanger fans.

Table 3.4 External Plant Noise Data

Description

Octave Band Centre Frequency (Hz) Single Figure (dBA) @1m

31.5 63 125 250 500 1000 2000 4000 8000

Aggreko Silent

Generator 84.7 77.9 81.6 73.5 70.3 67.6 62.7 54.8 49.8 73.3

Heat Exchanger

Fan 99.4 91.2 83.5 74.6 72.8 63.7 58.4 55.9 49.8 73.6

Shredder & Screening Equipment

70.4 69.6 66.8 67.7 69.3 60.5 57.6 51.8 41.1 70.6

@10m

3.2.3 Delivery Noise Data

The following model input data has been used to represent HGVs delivering materials to the site, noise

from vehicle arrivals and departures have been modelled as a line source along the site access road, whilst

noise from the unloading process has been modelled adjacent to the waste wood sorting and screening

area as a point source.

LAeq,1hr Noise Level:

1 Minute Lp 72.7 dB (Vehicle Unloading)

= 54.9 dB at 3 m distance (Point Source)

= 50.1 dB at 3m distance (Line Source; 2 No. Vehicle Pass-bys)

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3.3 Sensitive Receptors

Table 3.3 below summarises receptor locations that have been selected to represent worst-case residential

receptors with respect to direct noise from the site. Ground and first floor facades (adjacent and facing the

proposed development) of nearest properties have been represented. The locations of the receptors are

shown on SK02 in Appendix B.

Table 3.5 Existing Receptor Locations

Ref. Description Approximate

Distance to Source (m)

Height (m)

R1 Damson Croft, Ladywell Rise 16 1.5

R2 Cae Coch, Headon 80 1.5

R3 Ladywell Bungalow, Ladywell Rise 109 1.5

R4 Bottom Woodbeck Farm, Grove Road 926 4.0

R5 Hillcrest, Headon 815 4.0

R6 Mill Hill Farm, Headon 366 4.0

R7 Brickyard Farm, Greenspotts Lane 299 4.0

3.4 Tranquillity Rating

An assessment of the existing tranquillity level of the site has been based on the mapping data published

by Campaign to Protect Rural England (CPRE). This uses a colour coded system and a 500m assessment

grid for the whole of England, and a tranquillity rating of between 1 and 10 is assigned (1 being least

tranquil and 10 being most). By reference to these maps the development is assessed as falling into

Zone 5.

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4.0 Noise Survey

4.1 Noise Survey Methodology

A monitoring survey was undertaken to characterise baseline ambient noise levels currently experienced on

the site and to establish the relative local background and traffic noise levels. Equipment used during the

survey included:

Rion NL-52 Environmental Noise Analyser (WYG15) s/n 620858

Rion NL-52 Environmental Noise Analyser (WYG20) s/n 253702

Rion NC-74 Sound Calibrator s/n 35046823

The measurement equipment was checked against the appropriate calibrator at the beginning and end of

the measurements, in accordance with recommended practice and no drift was observed. The accuracy of

the calibrators can be traced to National Physical Laboratory Standards, calibration certificates for which

are available on request.

A baseline monitoring survey was undertaken at six locations (as specified in the following table and shown

in SK01 of Appendix B) from Friday 3rd February 2017 to Wednesday 8th February 2017. Attended short

term measurements were undertaken at five locations during the day, evening and night-time periods with

one additional location being measured unattended over a 121 hour period. The raw data collected from

the long term monitoring is available upon request.

Measurements were taken in general accordance with BS 7445-1:2003 The Description and Measurement

of Environmental Noise: Guide to quantities and procedures.

Table 4.1 Noise Monitoring Locations

Ref Description

LT1 West of Damson Croft by Industrial estate entrance road

ST1 West of Ladywell Bungalow

ST2 North of Bottom Woodbeck Farm

ST3 West of Brickyard Farm

ST4 East of Greenspotts Lane

ST5 On public footpath north of Hillcrest

4.2 Noise Survey Results

Existing ambient noise levels around the site are dominated by road traffic noise on Lady Well Lane,

Hazelwood Lane and Greenspotts Lane.

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Ambient and background noise levels are usually described using the LAeq index (a form of energy average)

and the LA90 index (i.e. the level exceeded for 90% of the measurement period) respectively. Road traffic

noise is generally described using the LA10 index (i.e. the level exceeded for 10% of the measurement

period).

Table 4.2. Meteorological Conditions during the Survey

Survey Location/

Date & Time Temperature Wind Speed

Wind Direction

Cloud Cover

(Oktas) Dominant Noise Source

Day ST1 08/02/2017

12:39 4.0 ºC 0-2 m/s NE 6

Road traffic noise on Lady Well Lane, bird scarers in field, distant drilling from site.

Day ST2 08/02/2017

09:53 4.0 ºC 0-2 m/s NE 7

Road traffic noise on Hazelwood Lane, birds.

Day ST3 08/02/2017

11:44 4.0 ºC 0-2 m/s NE 6

Road traffic noise on Lady Well Lane.

Day ST4 08/02/2017

10:39 4.0 ºC 0-1 m/s NE 7

Occasional car passes on Greenspotts Lane, occasional

distant traffic noise, birds, distant bangs.

Day ST5 08/02/2017

10:17 4.0 ºC 0-1 m/s NE 7

Occasional distant road traffic noise, birds.

Evening ST1 07/02/2017

21:55 3.0 ºC 0-1 m/s NE 7

Road traffic noise on Lady Well Lane, occasional car enters

industrial estate.


20:38 3.0 ºC 0-1 m/s NE 7

Road traffic noise Hazelwood Lane, aircraft, wildlife.


22:40 3.0 ºC 0-1 m/s NE 7

Road traffic noise on Lady Well Lane.


21:26 3.0 ºC 0-1 m/s NE 7

Occasional distant road traffic noise, wildlife, airplanes.


21:05 3.0 ºC 0-1 m/s NE 7

Occasional distant road traffic noise, wildlife.

Night ST1 07/02/2017

23:25 3.0 ºC 0-1 m/s NE 7

Occasional car pass on Lady Well Lane.

Night ST2 07/02/2017

23:04 3.0 ºC 0-1 m/s NE 7

Occasional car pass on Hazelwood Lane, wildlife.

Night ST3 08/02/2017

00:26 3.0 ºC 0-1 m/s NE 7


Night ST4 08/02/2017

00:06 3.0 ºC 0-1 m/s NE 7


Night ST5 07/02/2017

23:47 3.0 ºC 0-1 m/s NE 7


The results of the statistical measurements and frequency measurements conducted during the survey are

summarised in the following table. All values are sound pressure levels in dB (re: 2 x 10-5 Pa). For the long-

term (LT) location, the presented LAeq,T and LA10,T are average noise levels whilst the LA90 is the modal noise

level of each 5 minute measurement over the stated survey period.

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Table 4.3 Results of Baseline Noise Monitoring Survey

Period Duration

(T) Monitoring Date and Times Location

LAeq,T (dB)

LAmax,T (dB)

LAmin,T (dB)

LA10,T (dB)

LA90,T (dB)

Weekday Daytime

07:00 - 23:00 49 Hours

03/02/2017 – 08/02/2017 07:00 - 23:00

LT1

56.7 84.9 21.4 57.4 39.0

Weekday Night-time

23:00 – 07:00 24 Hours

03/02/2017 – 08/02/2017 23:00 - 07:00

47.1 79.2 18.1 37.1 23.0

Weekday Daytime

07:00 - 23:00 32 Hours

03/02/2017 – 08/02/2017 07:00 - 23:00

55.4 93.4 19.7 53.7 39.0

Weekday Night-time

23:00 – 07:00 16 Hours

03/02/2017 – 08/02/2017 23:00 - 07:00

47.0 79.8 20.6 39.9 29.0

Daytime 07:00 - 19:00

15 Mins 08/02/2017 12:39 ST1 65.3 82.1 26.1 68.2 32.4

15 Mins 08/02/2017 09:53 ST2 61.6 80.9 29.2 60.0 34.1

15 Mins 08/02/2017 11:44 ST3 56.8 81.9 27.0 60.0 30.1

15 Mins 08/02/2017 10:39 ST4 56.2 81.1 30.4 47.6 36.7

15 Mins 08/02/2017 10:17 ST5 38.2 58.9 28.7 40.6 33.6

Evening 19:00 - 23:00

15 Mins 07/02/2017 21:55 ST1 60.7 83.4 24.1 58.7 26.1

15 Mins 07/02/2017 20:38 ST2 61.8 78.6 26.1 62.2 34.8

15 Mins 07/02/2017 22:40 ST3 51.8 70.5 25.0 52.1 26.4

15 Mins 07/02/201721:26 ST4 49.5 84.8 29.9 44.1 34.0

15 Mins 07/02/2017 21:05 ST5 39.6 52.3 24.3 43.1 30.1

Night-time 23:00 - 07:00

15 Mins 07/02/2017 23:25 ST1 51.1 75.1 21.5 39.3 22.6

15 Mins 07/02/2017 23:04 ST2 29.0 58.0 23.7 29.9 25.6

15 Mins 08/02/2017 00:26 ST3 43.4 68.5 22.5 29.7 23.7

15 Mins 08/02/2017 00:06 ST4 31.0 53.8 17.5 31.7 19.6

15 Mins 07/02/2017 23:47 ST5 28.1 52.2 19.1 30.4 22.1

All values are sound pressure levels in dB re: 2x 10-5 Pa

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5.0 Assessment of Key Effects

5.1 Noise Intrusion Assessment

Internal LAeq noise levels, at nearby sensitive receptors from the site have been assessed both with

windows open, where a reduction from a partially open window of 15 dB has been used, and with windows

closed where an assumption of single glazing with a sound reduction of 30 dB has been used. For the

purposes of this worst-case assessment, deliveries and sorting and screening and all plant are considered

to be operational during the daytime, during the night time period it is understood that only the drying

plant will be fully operational (i.e. no deliveries or use of sorting plant).

Table 5.1 Noise Intrusion Levels Daytime LAeq,T

Location External Façade LAeq

at a 1m Distance

Internal LAeq with windows open

Internal LAeq with windows closed

Criteria Internal LAeq

Daytime/Night-time

R1 41.2 31.2 11.2 35

R2 33.6 23.6 3.6 35

R3 32.5 22.5 2.5 35

R4 19.0 9.0 0.0 35

R5 24.8 14.8 0.0 35

R6 37.3 27.3 7.3 35

R7 26.7 16.7 0.0 35

All values are sound pressure levels in dB re: 2x 10-5 Pa.

Table 5.2 Noise Intrusion Levels Night-time LAeq,T

Location External Façade LAeq

at a 1m Distance

Internal LAeq with windows open

Internal LAeq with windows closed

Criteria Internal LAeq

Daytime/Night-time

R1 29.9 19.9 0.0 30

R2 30.3 20.3 0.3 30

R3 27.0 17.0 0.0 30

R4 15.8 5.8 0.0 30

R5 17.3 7.3 0.0 30

R6 28.1 18.1 0.0 30

R7 24.1 14.1 0.0 30

All values are sound pressure levels in dB re: 2x 10-5 Pa.

The assessment presented in the table above shows that worst-case internal LAeq noise levels from the

proposed site are predicted to be below the BS 8233 noise intrusion criteria and therefore below the

Lowest Observed Adverse Effect Level at all existing residential receptors with windows open or closed

during both daytime and night-time periods.

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5.2 BS 4142 Noise Assessment

The assessment compares the predicted noise levels from the facility with the existing measured

background noise LA90 at the surrounding existing residential receptors. The representative existing

measured background noise level for each receptor has been established from a statistical analysis of the

long-term noise survey data and a review of the short-term noise survey data.

Table 5.3 below presents the difference between the background noise level and noise rating level

associated with the proposed plant. Given the very low absolute noise levels, in line with the guidance

provided within with BS 4142, of +2 dB has been included to account for tonal elements of the noise

associated with the plant which may be just perceptible at the surrounding receptor locations. For the

purposes of this worst-case assessment, the plant is considered to be operating at full capacity during both

the daytime and night-time periods.

Table 5.3 Noise Assessment for Proposed Plant

Ref

Measured Average Pre-Installation Background

LA90 Predicted Noise Level LAeq Noise Rating Level BS 4142 Score

Daytime Night-time Daytime Night-time Daytime Night-time Daytime Night-time

R1 39 23 41 30 43 32 4 9

R2 32 23 34 30 36 32 4 9

R3 32 23 33 27 35 29 3 6

R4 34 24 19 16 21 18 -13 -6

R5 34 22 25 17 27 19 -7 -3

R6 37 24 37 28 39 30 3 6

R7 37 24 27 24 29 26 -8 2

All values are sound pressure levels in dBA re: 2x 10-5 Pa.

All calculations used to derive the above table (including averaging of background noise levels and predicted source noise levels) have

been undertaken to 1 decimal place to avoid perpetuation of rounding errors. However, in accordance with BS4142 para 8.6 the

levels are expressed as integers (with 0.5 dB being rounded up). This may mean that the arithmetics in the above table may appear

to be up to 1 dB incorrect due to this rounding.

As presented in Table 5.3, worst-case noise rating levels are predicted to be no more than 4 dB above

background levels at all selected sensitive receptors during daytime periods and is therefore expected to

have a low impact. During the night-time period noise from the proposed plant is expected to be above

background noise levels at surrounding receptor locations, however it should be noted that as BS 4142

considers noise levels externally, greater emphasis should be given to the noise intrusion assessment in

section 5.1 above which demonstrates that noise levels within nearby dwellings are predicted to be very

low and are expected to be well within the relevant noise intrusion criteria (that relate to sleep disturbance

and internal resting conditions). Therefore noise from the site is expected to have a low impact.

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5.3 Tranquillity Assessment

An assessment of the existing tranquillity level of the site has been based on the mapping data published

by Campaign to Protect Rural England (CPRE). This uses a colour coded system and a 500m assessment

grid for the whole of England, and a tranquillity rating of between 1 and 10 is assigned (1 being least

tranquil and 10 being most). By reference to these maps the development is assessed as falling into Zone 5

and is of some tranquillity value. The site is located within an existing industrial estate and there are no

public rights of way within the site itself with the nearest public footpaths and access routes located to the

west of the development site. As the proposed development will not disrupt current public rights of way

and is located on the site of an existing commercial premises, the development is considered to have a

negligible effect on local access to areas of greater tranquillity.

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6.0 Conclusions of Noise Assessment

This report presents the findings of a noise assessment for the industrial drying of imported wood and

waste materials to produce various fuel products, including dried, split logs, woodchip and woodchip

briquettes at Headon Camp Industrial Estate, Retford. Section 123 of the NPPF gives four test points

against which the proposed development has been assessed. Considering each of these points, the

following conclusions can be drawn:

NPPF 123 A & B

In considering the NPPF test in section 123, points A & B, as it has been demonstrated that the BS 8233

criteria will be achieved at the closest receptors during both daytime and night-time periods with windows

open or closed when the plant will be in operation. Therefore, the proposals will not have a ‘significant

adverse impact’ on health or quality of life.

NPPF 123 C & D

No nearby business will have unreasonable restrictions put on them as a result of the proposals. In

addition, it is considered that the continued use of the site for industrial purposes will have a negligible

effect on the tranquillity of the area or local access to areas of greater tranquillity.

Planning Practice Guidance: Noise

Based on the assessment undertaken predicted noise levels even when the plant is operating at full

capacity at existing receptors are predicted to fall below the Significant Observed Adverse Effect Level

(SOAEL).

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Waste to Energy Assets Ltd A102068


Appendices

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Appendix A – Acoustic Terminology and Abbreviations

An explanation of the specific acoustic terminology referred to within this report is provided below.

dB Sound levels from any source can be measured in frequency bands in order to provide detailed

information about the spectral content of the noise, i.e. whether it is high-pitched, low-pitched, or

with no distinct tonal character. These measurements are usually undertaken in octave or third

octave frequency bands. If these values are summed logarithmically, a single dB figure is

obtained. This is usually not very helpful as it simply describes the total amount of acoustic

energy measured and does not take any account of the ear’s ability to hear certain frequencies

more readily than others.

dB(A) Instead, the dBA figure is used, as this is found to relate better to the loudness of the sound

heard. The dBA figure is obtained by subtracting an appropriate correction, which represents the

variation in the ear’s ability to hear different frequencies, from the individual octave or third

octave band values, before summing them logarithmically. As a result the single dBA value

provides a good representation of how loud a sound is.

LAeq Since almost all sounds vary or fluctuate with time it is helpful, instead of having an

instantaneous value to describe the noise event, to have an average of the total acoustic energy

experienced over its duration. The LAeq, 07:00 – 23:00 for example, describes the equivalent

continuous noise level over the 12 hour period between 7 am and 11 pm. During this time period

the LpA at any particular time is likely to have been either greater or lower that the LAeq, 07:00 – 23:00.

LAmin The LAmin is the quietest instantaneous noise level. This is usually the quietest 125 milliseconds

measured during any given period of time.

LAmax The LAmax is the loudest instantaneous noise level. This is usually the loudest 125 milliseconds

measured during any given period of time.

Ln Another method of describing, with a single value, a noise level which varies over a given time

period is, instead of considering the average amount of acoustic energy, to consider the length of

time for which a particular noise level is exceeded. If a level of x dBA is exceeded for say. 6

minutes within one hour, then that level can be described as being exceeded for 10% of the total

measurement period. This is denoted as the LA10, 1 hr = x dB.

The LA10 index is often used in the description of road traffic noise, whilst the LA90, the noise level

exceeded for 90% of the measurement period, is the usual descriptor for underlying background

noise. LA1 and LAmax are common descriptors of construction noise.

Rw The weighted sound reduction index determined using the above measurement procedure, but

weighted in accordance with the procedures set down in BS EN ISO 717-1. Partitioning and

building board manufacturers commonly use this index to describe the inherent sound insulation

performance of their products.

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An explanation of abbreviations used within this report is provided below.

CADNA – Computer Aided Noise Abatement

DMRB – Design Manual for Roads and Bridges

HGV – Heavy Goods Vehicle

UDP – Unitary Development Plan

UKAS – United Kingdom Accreditation Service

WYGE – WYG Environment

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Appendix B – Sketches

SK01 Noise Monitoring Locations

SK02 Receptor Locations

SK03 Worst-case Daytime LAeq Noise Levels

SK04 Worst-case Night-time LAeq Noise Levels

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LT1ST1

ST2

ST3

ST4

ST5

ST6Ladywell Lane

474100

474100

474200

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474300

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76

90

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Client:

Waste to EnergyAssets Ltd

Project:

Headon Camp, Retford

Drawing Title / Scenario:

Noise Monitoring Locations

Drawing Number:

SK01

Key:

Scale : Not to scale

WYGE Leicester 29.06.17

This map is based upon Ordnance Survey material reproducedby WYG on behalf of Her Majesty's Stationery Office, © Crown Copyright. Unauthorised reproduction infringesCrown copyright and may lead to civil proceedings.

Licence Number AL 553611

Executive ParkAvalon WayAnsteyLeicestershireLE7 7GRTel 0116 234 8000

© WYG Environment

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R1

R3

R2

R4

R5

R6

R7

474100

474100

474200

474200

474300

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474400

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Client:


Project:



Sensitive ReceptorLocation

Drawing Number:

SK02

Key:






© WYG Environment

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474900

474900

474920

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474960

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475000

475000

475020

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475100

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Project:



Worst-Case DaytimeLAeq Noise Levels

Drawing Number:

SK03

Key:

0.0 - 50.0 dB 50.0 - 55.0 dB 55.0 - 60.0 dB >60.0 dB






© WYG Environment

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474900

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Client:


Project:



Worst-Case Night-time LAeq Noise Levels

Drawing Number:

SK04

Key:

0.0 - 50.0 dB 50.0 - 55.0 dB 55.0 - 60.0 dB >60.0 dB






© WYG Environment

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APPENDIX 5 NOISE ASSESSMENT 77 14/07/2017

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Transcript of APPENDIX 5 NOISE ASSESSMENT 77 14/07/2017