11 noise and vibration 11.1 introduction - killoch · ‘ode of practice for noise and vibration...

BARR ENVIRONMENTAL LIMITED Barr Killoch Energy Recovery Park, Ochiltree, East Ayrshire Environmental Statement

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11 NOISE AND VIBRATION

11.1 Introduction

General

11.1.1 This Chapter of the Environmental Statement identifies and assesses the

significance of the likely noise impact of the proposals upon existing sensitive

receptors within the surrounding area. This assessment, prepared in support of the

proposed planning application, fully assesses the potential impacts of the proposed

development. The methodology used in this study conforms to current best

practice and guidance.

11.1.2 Details of the proposed development are described in greater detail in Chapter 4 of

this Environmental Statement.

Consultations

11.1.3 A request for scoping opinion was sent to East Ayrshire Council in March 2015.

Prior to the noise assessment being carried out by Wardell Armstrong LLP, the

proposed scope of works was also sent to the Environmental Health Department at

East Ayrshire Council.

11.1.4 The formal scoping opinion provided by East Ayrshire Council (dated 24 April 2015)

states the following in relation to noise:

11.1.5 “The noise assessment should take full consideration of existing baseline noise

levels within the vicinity of the site, with consideration to existing industrial uses

and operations on adjacent sites as well as highway associated noise. Noise

generation as a result of the operation of the facility, in addition to vehicles

accessing and egressing the site needs to be taken into consideration, with

mitigation measures identified within a formal planning submission. Measures such

as the control of traffic through identified routes, regular maintenance of

machinery, noise and vibration monitoring and enclosure of plant and machinery

should all be fully considered. A site noise monitoring scheme should be included

within a formal application submission, to demonstrate how monitoring would be

implemented on site.”

11.1.6 Therefore the following scope of works has been used based on the scoping

opinion:


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Noise level measurements would be taken at the nearest sensitive receptors over a suitable period in order to identify background levels, during daytime and night-time periods.

The cumulative impact of the noise sources associated with the ERP would be assessed using appropriate current guidance, principally in British Standard 4142: 2014 “Methods for rating and assessing industrial and commercial sound” (BS4142), World Health Organisation (WHO) Guidelines for Community Noise, 1999, and BS8233:2014 Guidance on Sound Insulation and Noise Reduction for Buildings (BS8233) where applicable.

With regards to construction noise, and noise due to development-generated traffic, the methodologies set out in British Standard 5228-1: 2009+A1 2014 ‘Code of Practice for noise and vibration control and open sites – Part 1: Noise’, and the Department of Transport’s ‘Calculation of Road Traffic Noise’ 1988 will be used.

11.2 Methodology

Noise Prediction Calculations and Mitigation Measures

11.2.1 Calculations have been carried out to predict the noise levels likely to be generated

by typical operational activities associated with the proposed Energy Recovery Park

and the resultant noise levels at existing sensitive receptor locations.

11.2.2 The prediction calculations have utilised noise measurement information provided

by the technology providers, information from Wardell Armstrong’s extensive

archive of data relating to waste management infrastructure, as well as noise data

provided in BS5228.

11.2.3 The potential sources of noise associated with the proposed development are

detailed in Section 11.5 of this report. At this stage, octave band frequency data

for the majority of potential sources of operational noise is not available. For the

purpose of this assessment ‘A’ Weighted noise levels have therefore been used.

11.2.4 The calculations have been carried out in accordance with the prediction

methodologies set out in British Standard 5228-1: 2009 ‘Code of Practice for noise

and vibration control on construction and open sites – Part 1: Noise’ and

BS4142:2014.

11.2.5 The calculations for each of the building facades are shown in full in Appendix 11.1

and discussed in Section 11.7 of this report.

11.2.6 To reduce the potential impact of operational noise from the development on

existing receptors, mitigation measures will be implemented. These measures are

discussed in Section 11.9 of this chapter.


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Criteria for Significance of Impact

11.2.7 The potential noise effects associated with the Energy Recovery Park have been

assessed in accordance with the guidance detailed in Section 11.3 to determine

whether statutory objectives are exceeded or whether undesirable/desirable

consequences may arise for the receiving environment. Where potential adverse

impacts are identified, appropriate mitigation measures are proposed to avoid,

reduce or compensate for the adverse effects. The significance of an environmental

impact will be determined not only by the magnitude of the impact but also by the

sensitivity of the receptor, as shown in Tables 11.1 and 11.2 respectively.

Table 11.1 Magnitude of Noise Impact

Sensitivity Description

Large

Impact resulting in a considerable change in baseline environmental conditions

predicted either to cause statutory objectives to be significantly exceeded or to

result in severe undesirable/desirable consequences on the receiving environment.

Medium

Impact resulting in a discernible change in baseline environmental conditions

predicted either to cause statutory objectives to be marginally exceeded or to result

in undesirable/desirable consequences on the receiving environment.

Small Impact resulting in a discernible change in baseline environmental conditions with

undesirable/desirable conditions that can be tolerated

Negligible No discernible change in the baseline environmental conditions, within margins of

error of measurement


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Table 11.2 Sensitivity of Receptor

Sensitivity Receptor Type

High

Receptor/resource has little ability to absorb change without fundamentally altering its

present character, or is of international or national importance. For example hospitals,

residential care homes, and internationally and nationally designated nature

conservation sites which are also known to contain noise sensitive species (i.e. noise

may change breeding habits or threaten species in some other way).

Medium

Receptors/resource has moderate capacity to absorb change without significantly

altering its present character. For example residential dwellings, offices, schools, and

play areas. Locally designated nature conservation sites which are also known to contain

noise sensitive species (i.e. noise may change breeding habits or threaten species in

some other way).

Low Receptor/resource is tolerant of change without detriment to its character or is of low

or local importance. For example industrial estates.

Negligible Receptor/ resource is not sensitive to noise.

11.2.8 The significance of an environmental impact for construction noise, road traffic

noise and on site operational noise is determined by the interaction of magnitude

and sensitivity. The Impact Significance Matrix used in this assessment is shown in

Table 11.3.

Table 11.3 Impact Significance Matrix

Magnitude Sensitivity

High Moderate Low Negligible

Large Very Substantial Substantial Moderate None

Medium Substantial Substantial Moderate None

Small Moderate Moderate Slight None

Negligible / Beneficial None None None None

11.2.9 The threshold between insignificant and significant lies between “Moderate” and

“Substantial”. Moderate impacts might be noticeable and intrusive but may cause

only a small change in behaviour. Substantial impacts might be noticeable and

disruptive, and might cause a material change in behaviour or attitude.

11.3 Planning Policy Context

National

11.3.1 An assessment is required to consider any potentially noise sensitive areas close to

the proposed site, i.e. the existing sensitive receptor areas. The potential effects of


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the existing and future sources of noise on the existing residential area have been

assessed with reference to the following guidance:-

Scottish Planning Policy, 20101;

Planning Advice Note, Planning and Noise 1/20112;

World Health Organisation’s (WHO) Guidelines for Community Noise 19993;

British Standard 8233: 2014 “Sound insulation and noise reduction for buildings – Code of practice” (BS8233)4;

BRE Controlling particles, vapour and noise pollution from construction sites, Parts 1 to 5, 20035;

British Standard 5228 -1:2009 + A1 2014 “Code of Practice for noise and vibration control on construction and open sites – Part 1: Noise” (BS5228-1)6;

British Standard 5228-2:2009 + A1 2014 “Code of Practice for noise and vibration control on construction and open sites – Part 2: Vibration” (BS5228-2)7; and

British Standard 4142:2014 ‘Method for rating and assessing industrial and commercial sound (BS4142)8.

Scottish Planning Policy (SPP):

11.3.2 Scottish Planning Policy states that ‘Planning authorities should support the

development of a diverse range of renewable energy technologies, guide

development to appropriate locations and provide clarity on the issues that will be

taken into account when specific proposals are assessed. Development plans

should support all scales of the development associated with the generation of

energy and heat from renewable sources, ensuring that an area’s renewable energy

potential is realised and optimised in a way that takes account of relevant

economic, social, environmental and transport issues and maximises benefits.’ SPP

goes on to state ‘Factors relevant to the consideration of applications will depend

on the scale of the development and its relationship with the surrounding area, but

are likely to include impact on amenity.’

11.3.3 In addition to SPP 6, PAN 1/2011, Planning and Noise is the key Scottish guidance

for planners with regard to planning and noise.

1 Scottish Planning Policy, 2010 2 Planning Advice Note, Planning and Noise 1/2011) 3 World Health Organisation’s (WHO) Guidelines for Community Noise 1999 4 British Standard 8233: 2014 “Sound insulation and noise reduction for buildings – Code of practice” (BS8233) 5 BRE Controlling particles, vapour and noise pollution from construction sites, Parts 1 to 5, 2003 6 British Standard 5228 -1:2009+A1 2014 “Code of Practice for noise and vibration control on construction and open sites – Part 1: Noise”

(BS5228-1) 7 British Standard 5228-2:2009+A1 2014 “Code of Practice for noise and vibration control on construction and open sites – Part 2:

Vibration” (BS5228-2) 8 British Standard 4142:2014 ‘Method for rating and assessing industrial and commercial sound (BS4142)


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PAN 1/2011, Planning and Noise

11.3.4 The guidance within PAN 1/2011 comments on industrial sources in paragraph 31,

it states that ‘Due to its variable character industrial noise is generally difficult to

assess. Since background noise levels vary throughout a 24 hour period it will

usually be necessary for Noise Impact Assessments to assess the acceptability of

noise levels for separate periods (e.g. day, evening night and weekends) chosen to

suit the hours of operation of the proposed development. Noise that may result

from traffic generated by new industrial developments is likely to be a relevant

consideration.’

11.3.5 The recently updated British Standard 4142:2014 ‘Method for rating and assessing

industrial and commercial sound’ deals with the assessment of industrial sources of

noise and take into consideration the character and context of the sound when

assessing noise impact at sensitive receptor locations.

Noise from Construction Phase Activities Assessment

11.3.6 Activities associated with the construction of the building and installation of the

plant will have the potential to generate noise and create an impact on the

surrounding area.

11.3.7 Guidance on the prediction and assessment of noise from development sites is

given in British Standard 5228 -1:2009 “Code of Practice for noise and vibration

control on construction and open sites – Part 1: Noise” (BS5228-1).

11.3.8 Construction noise can have disturbing effects on the surrounding neighbourhood.

The effects are varied and are complicated further by the nature of site works,

which will be characterised by noise sources which may change location

throughout the construction period. The duration of site operations is also an

important consideration. Higher noise levels may be acceptable if it is known that

the levels will occur for a limited period.

11.3.9 Local authorities may also have their own procedures for control of construction

activities that are proposed in their catchment area. East Ayrshire Council

recommend that construction works are only carried out between the following

hours:

Monday - Friday: 0700 – 1900 hours.

Saturday: 0800 – 1300 hours.

Sunday / Bank Holidays: No work at these times.


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11.3.10 In addition to the permitted hours of operation outlined by East Ayrshire Council,

the Control of Pollution Act 1974 (COPA 1974) gives the local authority power to

serve a notice under Section 60 imposing requirements as to the way in which

works are to be carried out. This could specify times of operation, maximum levels

of noise which should be emitted and the type of plant which should or should not

be used.

11.3.11 However it might be preferable for the chosen contractor to obtain prior consent

under Section 61 of COPA 1974. Section 61, enables anyone who intends to carry

out works to apply to the local authority for consent. Under Section 61 the local

authorities and those responsible for construction work, have an opportunity to

settle any problems, relating to potential noise, before work starts.

11.3.12 In addition to COPA 1974, BS5228-1 provides guidance on significance criteria for

assessing the potential noise impacts associated with the construction phase of

large projects. For the purposes of this noise assessment, the noise likely to be

generated by the earthworks and construction phase, have been assessed against

significance criteria established, using the BS5228-1 ABC Method.

11.3.13 The ABC method for determining significance criteria requires the ambient noise

levels at existing sensitive receptors to be determined. The ambient noise levels at

each existing receptor location are then rounded to the nearest 5dB(A) to

determine the appropriate threshold value in accordance with the category value,

A B or C, as detailed in Table 11.4.

Table 11.4: Thresholds of Significant Impact from Construction Noise at Residential Receptors in accordance

with the ABC Method of BS5228-1

Assessment Category and Threshold

Value Period (LAeq)

Threshold Value, in decibels (dB)

Category A 1 Category B 2 Category C 3

Daytime (0700 to 1900 hours) and

Saturdays (0700 to 1300 hours) 65 70 75

1 Category A: Threshold values to use when ambient noise levels (when rounded to the nearest 5dB) are less

than this value.

2 Category B: Threshold values to use when ambient noise levels (when rounded to the nearest 5dB) are the

same as Category A values.

3 Category C: Threshold values to use when ambient noise levels (when rounded to the nearest 5dB) are higher

than Category A values.

11.3.14 The noise level likely to be generated at the receptor during the construction

phase, i.e. the ambient noise level plus construction noise, is then compared to the


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appropriate category value. If the noise level is greater than the appropriate

category value, a significant noise impact may be registered.

11.3.15 For the purposes of this chapter it is possible to estimate the degree of impact from

the site works, according to the suggested standards, by reference to the time

periods during which noise levels may occur in excess of the quoted values. These

levels can be seen in Table 11.5.

Table 11.5: Construction Noise Assessment Significance Criteria

Magnitude of Impact Criteria for assessing Construction Noise Impact

Large Noise levels exceed the Assessment Category threshold level for the duration of

the construction works.

Medium

Noise levels exceed the Assessment Category threshold level for periods of more

than one month, but for significantly less than the whole duration of the

construction works.

Small Noise levels exceed the Assessment Category threshold level for periods of less

than one month.

Negligible Noise levels do not exceed the Assessment Category threshold level during any

period.

11.3.16 The construction phase assessment will be carried out for existing sensitive

receptors ESR1 to ESR5. A noise impact at all other existing sensitive receptors may

be felt, but will be less than the assessed locations.

11.3.17 The noise assessment for the construction phase details baseline daytime noise

levels measured at sensitive receptor locations and outlines the main construction

activities that could give rise to noise impacts at receptors in the vicinity of the

proposed development. It also sets out details of ‘best practice’ management and

control measures to ensure that impacts are minimised as far as possible.

Vibration from Earthworks and Construction Phase Activities

11.3.18 Work involving heavy plant on an open site has the potential to generate vibration,

which may, in certain circumstances, propagate beyond the boundary of the site. In

situations where particularly heavy plant, vibrating compaction equipment or piling

rigs are being used close to the site boundary, nearby properties may experience

ground-borne vibration.

11.3.19 Guidance on the assessment of vibration from development sites is given in British

Standard 5228-2:2009 ‘’Code of Practice for noise and vibration control on

construction and open sites – Part 2: Vibration’’ (BS5228-2).


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11.3.20 The sensitive receptors most likely to be affected by vibration generated by the

construction phase of the development are those located closest to the site, and

are detailed in Table 11.7 of this chapter.

11.3.21 The likelihood of vibration induced damage or nuisance will depend upon the

nature of the source, the characteristics of the intervening solid and drift geology

and the response pattern of the structures around the site.

11.3.22 Given the temporary nature of any construction works, and the distance of the

sensitive receptors from those activities (i.e. 40m away or greater) it is not

anticipated that vibration will have any significant adverse impact at receptors in

the vicinity of the site, and is not considered further in this assessment.

Road Traffic Noise at Existing Sensitive Receptors

11.3.23 The site is located at the head office of Barr Environmental Limited which currently

incorporates a number of office and storage buildings, asphalt plant (operated by

Breedon Aggregates) and ancillary infrastructure, an area used for training

purposes and general lay-down area for equipment, with access gained directly

from the A70. The proposals for the development indicate that the site will

generate an extra 31 staff trips over a 3 hour morning period, with a similar

number in the evening. In addition it is predicted that the operation of the facility

will generate an additional 8-9 movements per hour associated with the import of

waste and export of products and waste materials. It is considered that the vehicle

movements to and from the site will not significantly change road traffic noise

levels on the A70 and therefore no further assessment of road traffic noise has

been undertaken.

Industrial Noise Impact Assessment

11.3.24 The potential impact of the predicted noise levels at existing residential receptors

has been assessed using British Standard 4142:2014. BS4142 is used to rate and

assess sound of an industrial and/or commercial nature including:

sound from industrial and manufacturing processes;

sound from fixed installations which comprise mechanical and electrical plant and equipment;

sound from the loading and unloading of goods and materials at industrial and/or commercial premises; and

sound from mobile plant and vehicles that is an intrinsic part of the overall sound emanating from premises or processes, such as that from forklift trucks,


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or that from train or ship movements on or around an industrial and/or commercial site.

11.3.25 The standard is applicable to the determination of the following levels at outdoor

locations:

rating levels for sources of sound of an industrial and/or commercial nature; and

ambient, background and residual sound levels, for the purposes of:

1) Investigating complaints;

2) Assessing sound from proposed, new, modified or additional source(s)

of sound of an industrial and/or commercial nature; and

3) Assessing sound at proposed new dwellings or premises used for

residential purposes.

11.3.26 The purpose of the BS4142 assessment procedure is to assess the significance of

sound of an industrial and/or commercial nature.

11.3.27 BS4142 refers to noise from the industrial source as the ‘specific noise’ and this is

the term used in this report to refer to noise which is predicted to occur due to

activities associated with the proposed Energy Recovery Park. The ‘specific noise’

levels, of the proposed premises, are detailed in Section 11.5 of this chapter.

11.3.28 BS4142 assesses the significance of impacts by comparing the specific noise level to

the background noise level (LA90). Section 11.4 provides details of the background

noise survey undertaken.

11.3.29 Certain acoustic features can increase the significance of impacts over that

expected from a simple comparison between the specific noise level and the

background noise level. In particular BS4142 identifies that the absolute level of

sound, the character, and the residual sound and the sensitivity of receptor should

all be taken into consideration. BS4142 includes allowances for a rating penalty to

be added if it is found that the specific noise source contains a tone, impulse

and/or other characteristic, or is expected to be present. The specific noise level

along with any applicable correction is referred to as the ‘rating level’.

11.3.30 The greater the difference between the rating level and the background noise level,

the greater the magnitude of the impact. The assessment criteria given by BS4142

are as follows:


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A difference of around +10dB or more is likely to be an indication of a significant adverse impact, depending on the context.

A difference of around +5dB is likely to be an indication of an adverse impact, depending on the context.

The lower the rating level is relative to the measured background sound level, the less likely it is that the specific sound source will have an adverse impact or a significant adverse impact. Where the rating level does not exceed the background sound level, this is an indication of the specific sound source having a low impact, depending on the context.

11.3.31 During the daytime, BS4142 requires that noise levels are assessed over 1-hour

periods. However, during the night-time, noise levels are required to be assessed

over 15-minute periods.

11.3.32 Where the initial estimate of the impact needs to be modified due to context,

BS4142 states that all pertinent factors should be taken into consideration,

including:

The absolute level of sound;

The character and level of the residual sound compared to the character and level of the specific sound; and

The sensitivity of the receptor and whether dwellings or other premises used for residential purposes already incorporate design measures that secure good internal and/or outdoor acoustic conditions.

11.3.33 The assessment of the potential impact of the predicted noise levels of the

operational phase of the Site at residential receptors has been based on BS4142

procedures. The predicted noise levels have been assessed against the typical

daytime and night-time background noise levels, measured at each of the

monitoring locations during the noise survey.

11.3.34 In order to assess the effects of the sound at the sensitive receptors, within the

context of the local noise environment, the predicted noise levels have been added

to the measured, average ambient noise level at the existing sensitive receptor

locations, The ambient levels currently include all existing industrial operations

within the vicinity of the site, which Wardell Armstrong LLP understand will remain

unchanged.

11.3.35 The noise impact assessment for existing residential receptors is discussed in

greater detail in Section 11.7 of this chapter.

11.3.36 For the purposes of this chapter it is possible to estimate the degree of impact from

the Energy Recovery Park, according to the suggested standards, by reference to


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the sound impact when taking context into consideration, which noise levels may

occur in excess of the quoted values. These levels can be seen in Table 11.6.

Table 11.6 Operational Noise Assessment Significance Criteria

Magnitude of Impact Criteria for assessing Operational Noise Impact

Large

Significant adverse impact predicted in accordance with BS4142 taking into

account the context of the site and the difference between existing background

and the rating level of the industrial source.

Medium

Adverse impact predicted in accordance with BS4142 taking into account the

context of the site and the difference between existing background and the rating

level of the industrial source.

Small Impact predicted in accordance with BS4142 which is not considered significant

taking the context into account.

Negligible

The rating Level including allowances for rating penalty (LAeq) is below the existing

background range (LA90) for the majority of the assessment period and the noise

levels are not considered significant the context into account.

11.4 Noise Survey

Existing Noise Sensitive Receptor Locations

11.4.1 Details of the nearest existing residential receptor locations, including distances

from the site application boundary, are set out in Table 11.7. The locations of the

receptors are also shown on Figure 11.1.

Table 11.7 - Existing Noise Sensitive Receptor Locations and Monitoring Location

Existing Sensitive

Receptors (ESR) and

Monitoring Location

(ML)

Description

Direction

from the

Site

Distance from

the Site Red

Line

Boundary

Approximate Grid

Reference

x y

ESR 1

(Monitoring Location 1)

Killoch Farm, Ochiltree,

Cumnock KA18 2RN South 22 247912 620250

ESR 2


Creoch Farm Ochiltree,

Cumnock KA18 2QH North 561 247621 620983

ESR 3


Provost Mount, Ochiltree,

Cumnock KA18 2RR South 348 247699 619863

ESR 4


Killochside, Ochiltree,

Cumnock KA18 2RP West 310 247373 620178

ESR 5


Laigh Tarbeg Farm,

Ochiltree, Cumnock KA18

2RL

East 467 248758 620479


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Baseline Noise Survey

11.4.2 As part of this assessment, Wardell Armstrong LLP has carried out a noise survey to

assess the current ambient and background noise levels at the five nearest existing

residential receptor locations, as shown on Figure 11.2.

11.4.3 To provide information representative of the operational periods of the

development, attended noise monitoring was undertaken during the daytime hours

of 12:40 to 16:00 hours, evening hours between 19:00 and 23:00 and night-time

hours between 23:00 and 04:30, from the 18th March to 20th March 2015.

11.4.4 Attended noise measurements were taken at three monitoring locations, which are

considered to be representative of existing sensitive receptors nearest to the

dominant noise sources. The monitoring locations are as follows:

Monitoring Location 1: To the south of the site, approximately 10m from the A70. This location is considered representative of the existing sensitive receptor of Killoch Farm.

Monitoring Location 2: To the north of the site, approximately 270m from the site. This location is considered representative of the existing sensitive receptor of Creoch Farm.

Monitoring Location 3: To the south of the site, approximately 330m from the A70. This location is considered representative of the existing sensitive receptor of Provost Mount.

11.4.5 Unattended noise monitoring was undertaken at a further two locations for a full

24 hour period between the 18th and 19th March 2015.

Monitoring Location 4: To the north of the site, approximately 90m from the A70. This location is considered representative of the existing sensitive receptor of Killochside.

Monitoring Location 5: To the west of the site, approximately 60m from the A70. This location is considered representative of the existing sensitive receptor of Laigh Tarberg Farm.

11.4.6 During the monitoring periods, subjective observations were made in relation to

existing noise sources in the area.

11.4.7 The noise measurements were made using Class 1, integrating sound level meters.

In accordance with guidance the sound level meters were mounted vertically on a

tripod 1.5m above the ground. Monitoring locations were also more than 3.5

metres from any other reflecting surfaces.

11.4.8 The sound level meter was calibrated to a reference level of 94dB at 1kHz both

before, and on completion of, the noise survey. No drift of more than 0.5 dB was


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measured between monitoring periods. BS4142 states; ‘Where the difference

between the initial calibration check on completion of measurements exceeds 0.5

dB, treat with caution the results of measurements obtained for any period to

which this relates.’ The measured drift over the monitoring periods is therefore

considered to be insignificant.

11.4.9 Weather conditions during the survey were as follows:

11.4.10 18th to 19th March 2015;

No wind;

No fog;

Dry ground;

No frozen ground or snow coverage;

Temperature throughout the monitoring periods ranged from 1-10˚C; and

Cloud cover varied from approximately 20 to 100%.

11.4.11

11.4.12 20th March 2014;

Light winds of speeds below 5m/s;

Occasional slight drizzle;

No fog;

Damp ground;

No frozen ground or snow coverage;

Temperature throughout the monitoring periods around 8˚C; and

Cloud cover varied from approximately 80 to 100%.

11.4.13 The A-weighted9 L90s10 were recorded for each monitoring period, to comply with

the requirements of BS4142. The A-weighted Leqs11 together with the maximum

and minimum sound pressure levels were also recorded to provide additional

information.

11.4.14 For the purpose of this assessment background noise levels have been presented

between the daytime hours of 0700 to 2300 hours, and night-time hours of 2300 to

0700 hours.

11.4.15 A summary of the range of background noise levels, for the above periods is

presented in Table 11.8.

9 ‘A’ Weighting: An electronic filter in a sound level meter which mimics the human ear’s response to sounds at different frequencies under defined conditions 10 L90: The noise level which is exceeded for 90% of the measurement period. 11 Leqs: Equivalent continuous noise level; the steady sound pressure which contains an equivalent quantity of sound energy as the time-varying sound pressure levels.


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Table 11.8: Summary of the Measured Background Noise Levels over Various Periods (Figures in dB LA90)

Monitoring

Location

Existing Sensitive Receptor

Location

Range of Measured Background Noise Levels

0700 to 2300 Hours 2300 to 0700 Hours

ML1 ESR 1 – Killoch Farm 25-47 21-41

ML2 ESR 2 – Creoch Farm 28-32 19-28

ML3 ESR 3 – Provost Mount 40-45 25-30

ML4 ESR 4 – Killochside 35-54 24-53

ML5 ESR 5 – Laigh Tarburg Farm 41-57 31-55

11.4.16 Attended noise monitoring allows observations and detailed notes to be made of

the significant noise sources which contribute to each of the measured levels. The

observations identified the following:

Road Traffic Noise: Road traffic on the A70 was audible at all monitoring locations

throughout the noise survey.

Industrial Noise: Noise from existing farm operations was audible at monitoring

locations 3 and 5.

Aircraft: Noise from aircraft flying to and from Glasgow Prestwick airport was

occasionally audible at all monitoring locations throughout the noise survey.

Other Sources: Bird song and rustling foliage was occasionally audible at all locations

throughout the noise survey.

11.5 Potential Sources of Noise

Introduction

11.5.1 Barr Environmental Ltd is proposing to install and operate an Energy Recovery Park

(ERP) incorporating a Material Recovery Facility (MRF), a refuse derived fuel

preparation plant (RDF), and an Energy from Waste Plant (EfW). It is understood

that waste will be received between the hours of 0730 and 1800 Monday to Friday


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and 0700-1200 on a Saturday. The EfW will operate 24 hours per day, 7 days per

week, 365 days per year.

11.5.2 The proposed ERP has the potential to create noise through a variety of sources.

These sources include the Waste Reception Area (WRA), RDF, EfW and associated

stack. Vehicle deliveries and collections will also contribute to the noise climate.

However, vehicle movements to and from the site are not considered to

significantly impact on road traffic noise levels. Each potential source of

operational noise is identified below.

Waste Reception Area (WRA)

11.5.3 Non-hazardous commercial, construction and industrial waste will be received

between the hours of 0730 and 1800 Monday to Friday and 0700-1200 on a

Saturday.

11.5.4 The Waste Reception Area has been designed to allow ease of access and the most

efficient delivery of waste to the facility, which will see waste being delivered via

bulk articulated vehicles, compactors, skips tippers and the like.

11.5.5 Fast acting roller shutter doors will allow multiple delivery vehicles to enter the

tipping hall simultaneously. On entering the reception hall vehicles will discharge

their payload onto a flat impermeable reception slab. Front end loaders will be

employed to manage the incoming waste and used to load the feed hoppers.

11.5.6 A summary of the noise information associated with the WRA, together with the

sound power levels of plant associated with activities within the waste reception

area, is detailed in Table 11.9.


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Table 11.9: Noise Level Information of Plant associated with the WRA

Facility Associated Plant Data Source Percentage On-

time

Noise Level,

Sound Power

per unit (dB(A))

unless stated

Waste Reception

Area

Wheeled Loader 1 BS5228-1,

Table C.2 Ref

No 27

100% 108

Wheeled Loader 2 100% 108

Tipper Lorry 1 (Waste

Delivery) BS5228-1,

Table C.8 Ref

No 20

50% 106

Tipper Lorry 2 (Waste

Delivery)

50% 106

MRF Loading Technology

Supplier

100% 74

11.6 Material Recovery Facility (MRF)

11.6.1 Incoming waste will pass along one of two lines through a Shredder, Trommel,

Density Separator, Eddy Current Separator, Flip Flow Screen and a further

Shredder. These items of plant will shred the waste and remove recyclables and

other residual waste not suitable for thermal treatment.

11.6.2 The remaining material will be transferred to the EfW facility as RDF for thermal

treatment.

11.6.3 A summary of the noise information associated with the MRF area, together with

the noise level data of plant associated with activities, is detailed in Table 11.10.

Table 11.10: Noise Level Information of Plant associated with the RDF Facility Associated Plant Data Source Percentage

On-time

Noise Level, Sound

Power per unit

(dB(A)) unless

stated

Pre-treatment

/ RDF

DF307 Shredder x2

Technology Supplier

100% 98

Trommel x2 100% 88

Density Separator x2 100% 93

Flip Flow Screen 100% 87

DW306 Ceron Shredder x2 100% 98


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Eddy Current Separator x2 100% 85

Conveyors 100% 110

Energy from Waste Plant (EfW)

11.6.4 The EfW facility will use gasification technology to thermally treat the RDF to

produce electricity and heat. Gasification technology heats materials in an

environment with a controlled amount of oxygen, and the reaction that occurs

releases a ‘syngas’ which is then transferred to a secondary chamber where it is

combusted to produce heat. This heat passes to a boiler to produce superheated

steam, which is used to drive a turbine, producing electricity.

11.6.5 A summary of noise level data of plant associated with the EfW Facility is given in

Table 11.11.

Table 11.11: Noise Level Information of Plant associated with the EfW Facility Associated Plant Data Source Percentage On-

time

Noise Level, Sound

Power per

unit(dB(A)) unless

stated

Energy from Waste

Plant (EfW)

Stack

Equipment

Supplier

100% 84.7

Flue Gas Fan 100% 83

Re-circulated Flue

Gas Fan 100% 73

Combustion Air

Fan 100% 89

Filter Dust Silo

Cleaning (Bottom

of Silo)

20% 95.3

Ventilation Fan (on

top of Filter Dust

Silo)

100% 82.5

Flue Gas Filter

Cleaning 20% 80.4

Air Cooled Heat

Exchanger (on top

of roof)

100% 75

Turbine 100% 96

Generator 100% 85

Air Cooled

Condenser

100% 80

Hydraulic Skid,

Furnace

100% 83


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Air Compressor 100% 69

Thermal Oil Skid 100% 75

Cooling Medium

Pump

100% 75

Steam silencer (on

top of roof)

100% 85

Feed Water Pumps 100% 75

Circulation Pumps 100% 71

Emergency Power

Generator

100% 95

On-Site Vehicle Movements

11.6.6 Vehicle movements on the site have the potential to increase the ambient noise

levels at existing receptors located in the immediate vicinity of the site. These

vehicle movements include the arrival of waste and collection of recyclates and

process rejects/residues.

11.6.7 Information provided by the transport consultant for the project indicates that

there will be an average of 8 vehicle movements per hour delivering residual waste

to the facility and 1 vehicle movement per hour exporting recyclates and process

rejects/residues.

11.6.8 Access to the site is gained directly from the A70 via the existing site access already

used to route HGVs onto the local road network. It is considered that the additional

HGVs will not significantly increase road traffic noise levels at existing sensitive

receptors as HGV movements from the site already form part of the ambient noise

levels. However vehicle movements on the site have the potential to increase the

ambient noise levels at existing receptors located in the immediate vicinity of the

site, these movements have therefore been considered within this noise

assessment.

11.7 Noise Prediction Calculations

Noise from Construction Phase Activities

11.7.1 During the construction phase, any work carried out at the proposed development

is likely to generate noise that may propagate beyond the proposed development

boundary.


LE12479/REP-004 May 2015

11.7.2 At this stage, detailed information regarding the nature and timescales of activities

likely to take place during the construction phase is not known. Activities on the

site, which could give rise to construction noise impacts if carried out, could include

(but are not limited to):

Site preparation i.e. ground excavation, levelling of ground, trenching, trench filling, unloading and levelling of hardcore and compacting filling;

Construction of the buildings, including piling, fabrication processes e.g. planning, sanding, routing, cutting, drilling and laying foundations; and,

Installation of the process plant and erection of stack.

11.7.3 The above activities have the potential to generate short-term increases in noise

levels, above those recommended in BS5228-1. The levels of noise received at the

receptors closest to the proposed development phases would depend on the sound

power levels of the machines used, the distance to the properties, the presence of

screening or reflecting surfaces and the ability of the intervening ground to absorb

the propagating noise.

11.7.4 Based on the ambient noise levels measured during the weekday, the appropriate

category value has been determined for each of the sensitive receptors, as detailed

in Table 11.12. Details of the noise survey carried out at the sensitive receptors are

set out in Section 11.4 of this chapter.

Table 11.12 Construction Noise Assessment Criteria

Monitoring

Location

Existing Sensitive

Receptor Location

Average

Measured

Daytime

Noise

Levels dB

LAeq

Ambient

Noise Level

Rounded to

the nearest

5dB LAeq

Appropriate

Category Value

A, B or C in

accordance

with BS5228-1

Noise Level above

which activities of

the Construction

Phase may cause a

significant impact

at the Receptor dB

LAeq

ML1 ESR 1 – Killoch Farm 66 65 B 70

ML2 ESR 2 – Creoch Farm 41 40 A 65

ML3 ESR 3 – Provost

Mount 53 55 A 65

ML4 ESR 4 – Killochside 54 55 A 65

ML5 ESR 5 – Laigh Tarburg

Farm 60 60 A 65


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11.7.5 Noise generated by the earthworks and construction phases of the development

may have a short-term, adverse impact at the above sensitive receptors.

11.7.6 The nearest noise sensitive receptors to the development, as detailed in Table 11.7,

will be the residential property Killoch Farm (ESR 1). Due to the proximity of the

farm to the proposed development it is considered that construction activities may

generate noise levels in excess of those detailed in Table 11.12 and therefore

appropriate noise mitigation measures have been recommended. All other

sensitive receptors are located further than 300m from the development. Given the

distances between the development and these receptors, it is considered unlikely

that the construction activities will generate noise levels in excess of those detailed

in Table 11.12.

11.7.7 To minimise the potential levels of noise generated by the construction works best

working practice will be put in place. Details can be found in section 11.9 of this

chapter.

Noise Prediction Calculations for the Proposed Energy Recovery Park

11.7.8 The potential noise levels at nearby receptors, generated by operational activities

at the proposed ERP, will be affected by the acoustic insulation properties of the

facility building, the distance of each noise source from the receptors, any

intervening barriers, and any noise mitigation measures implemented (as detailed

in Section 11.9 of this report).

11.7.9 Prediction calculations have been carried out to determine the noise levels likely to

be generated by noise breaking out of the proposed facility and on-site vehicle

movements, at each of the existing residential receptors.

11.7.10 As existing dwellings are of sufficient height to overlook the development, noise

breakout via roof structures, as well as facades of the facility has been considered

at the receptors.

Assumptions

11.7.11 Noise predictions are based on manufacturers’ data, archive measurement

information in relation to similar plant and/or documented plant levels within

British Standard 5228:2009, as detailed in Section 11.6 of this report for the various

processes anticipated within the Energy Recovery Park (ERP).


LE12479/REP-004 May 2015

11.7.12 It is assumed that the ERP building will act as a series of reverberant spaces, and

the prediction calculations identified in Appendix 11.1 have taken this into

consideration. To provide a robust assessment, it is considered that the existing

materials of the buildings will provide a low level of acoustic absorption, therefore,

an absorption coefficient of 0.01 has been used for the floors and an absorption

coefficient of 0.15 have been used for the walls and ceiling in the prediction

calculations. However, as it is anticipated that several tonnes of waste will remain

in the ERP at any one time; the waste will provide additional absorption, and as

such, the reverberant sound pressure within the ERP would be expected to reduce.

11.7.13 The majority of plant at the proposed ERP will be situated within the proposed

building. Information provided by the architect and building material manufacturer

for the development indicates that the facades will be of the following

construction;

Cladding Façade: CA Twin Term wall cladding system (or equivalent), Rw 39dB-9 Ctr=30dB and higher specification CA Twin Therm wall cladding, Rw 43-7 Ctr=36dB. Roof cladding slightly improved due to increased thermal insulation but offset by incorporation of integral roof lights (approximately 15% of area), therefore a performance of 30dB has been assumed for the roof in line with the wall cladding

Glass Planks: Pilkington Profilit system, sound insulation up to 41dB. , No information was available regarding the spectral performance of the system, therefore a performance of 30dB Rw+Ctr has been assumed in line with the wall cladding system

Roller Shutter: 21dB Rw+ Ctr

11.7.14 For the purpose of this assessment suitable topographical and mapping dated has

been used to include the existing environment surroundings, such as existing

buildings, within the noise modelling exercise.

11.7.15 At this stage, third octave band noise data is not available for the majority of

equipment at the proposed facility. It has therefore been assumed that the noise

from the facility will be centred on 500Hz, with the performance of the proposed

construction material adjusted to account for the traffic spectrum Ctra where this

information is available. It is recommended that further assessment of noise

breakout from the proposed buildings be undertaken prior to full commencement

of operations to confirm the frequency and sound level of noise breakout with the

design of the building envelope adjusted to provide the required performance at

each frequency as appropriate.


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Uncertainty

11.7.16 To reduce assessment uncertainty the following steps have been taken:

Sound power level information was obtained from the manufacturer where possible;

In instances where noise data for industrial sources was not available, data have been taken from British Standards, such as BS5228 and Wardell Armstrong’s internal data library;

The assessment has been conducted using the most suitable data source for the plant in question, this should be confirmed once full detailed data are available. At this time a re-assessment of the noise emission from the proposed ERP should be conducted to confirm the accuracy of the initial assumptions;

The background noise measurement locations were selected to be representative of the background noise level at the closest point of the receptors to the proposed ERP. In accordance with guidance the sound level meter was mounted vertically on a tripod 1.5m above the ground. Monitoring locations were also more than 3.5 metres from any other reflecting surfaces;

The distance between the source and nearest receptors has been measured from scale plans showing the locations of each building;

The background noise measurements were undertaken during appropriate weather conditions;

The background noise measurements were undertaken during what are considered to be the quietest periods of the day and night-time, together with periods of increased traffic to establish the typical background levels;

The background noise measurements were undertaken over representative periods through the daytime and night-time period to establish the background range in accordance with the requirements of BS4142;

The results of each measurement period are reported to the nearest 0.1dB within Appendix 11.2;

Noise measurements were made using Class 1, integrating sound level meters;

Noise Modelling has been undertaken using SoundPLAN 7.3, which conforms to the requirements within ISO 9613 Attenuation of sound during propagation outdoors.

SoundPLAN 7.3 is a well-established, a wildly used model and is dependent on the accuracy of the data that is included within the model.

Where possible detailed data such as topographical data, intervening buildings from the latest mapping data available, receptor locations and heights, and source data have been included.

The specific performance of each building facade element has been included within the noise breakout calculations and the calculated sound power levels have been assigned to the surface area of each element within the noise model.


LE12479/REP-004 May 2015

Impact of the Operations Associated with the Energy Recovery Park

11.7.17 Noise modelling has been undertaken. The results of the SoundPLAN 7.3 modelling

for the operation of the ERP are shown in Table 11.13. The predicted noise levels

of each process within the ERP building, external plant and vehicle movements

have been calculated to provide the total cumulative noise level at each receptor,

during typical daytime and night-time periods.

Table 11.13: Predicted Breakout Noise Levels Generated by the Operations of the ERP at Sensitive Receptor

Locations

Receptor

Predicted Day and Night-time Noise Levels at the

Receptor

(Figures in dB LAeq )

Day

(0700-1800)

Evening

(1800-2300)

Night

(2300-0700)

ESR 1 – Killoch Farm 47 41 40

ESR 2 – Creoch Farm 28 25 24

ESR 3 – Provost Mount 35 30 30

ESR 4 – Killochside 35 29 29

ESR 5 – Laigh Tarburg Farm 30 27 22

11.8 Noise Impact Assessment

Introduction

11.8.1 In accordance with BS4142, an industrial noise assessment has been carried out to

assess the impact of sound from the proposed ERP on existing sensitive receptors.

BS4142 Assessment of the Operations of the ERF at Existing Residential Receptors

Application of any Rating Penalty

11.8.2 The specific noise of the loading shovels operating at the site is considered to be

intermittent in a manner which is potentially perceptible at the existing residential

receptors. This would be consistent with the observed intermittent impact of the

existing site operations. Therefore, in accordance with BS4142 a +3dB penalty

should be added to the measured noise level for assessment purposes.

11.8.3 At this stage, information on the octave band frequency data for the potential

sources of operational noise is not available. For the purpose of this assessment, it


LE12479/REP-004 May 2015

is assumed that the proposed equipment within the ERP would be designed with

mitigation, such that sound breakout would not be tonal at the existing sensitive

receptors. Therefore, no tonal correction has been applied to the predicted noise

levels associated with the internal operational activities of these facilities.

Identification of the Background Noise

11.8.4 Section 8 of BS4142 provides guidance on the selection of the background sound to

be used in the assessment. BS4142 states that the background sound levels used

for the assessment should be representative of the period being assessed (i.e

daytime or night-time periods), and that there is no “single” background sound

level.

11.8.5 For the purpose of the assessment the range of background sound levels during the

day and night-time periods, measured at monitoring locations 1-5, have been used.

The data collected and presented within Appendix 11.2 is considered

representative of the LA90,1hour daytime and LA90,15 minutes night-time, background

sound levels at existing sensitive receptors.

11.8.6 As part of the BS4142 assessment procedure, the predicted rating levels from the

proposed ERP are then compared with background sound levels at the identified

receptors.

Daytime Assessment

11.8.7 The BS4142 assessment has been undertaken using the highest predicted specific

noise level from site operations, as detailed within Table 11.13, for each of the

receptor locations. Before assessing the noise levels at receptor facades, 3dB must

be added to the free field background noise level to take into consideration any

reflections for the existing sensitive receptor facades. This will allow for direct

comparisons with the predicted rating levels at receptor facades for the typical

daytime operations. HGV deliveries will cease at approximately 1800 hours,

therefore a separate assessment has been undertaken for daytime (0700-1800) and

evening (1800-2300 hours). The results for each receptor location are detailed in

Tables 11.14 and 11.15.


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Table 11.14: Assessment at Existing Sensitive Receptors – Killoch for Daytime Operations of the ERF, between 0700 and 1800 hours

Figures in dB LAeq1 Hour

Receptor

ESR 1 –

Killoch

Farm

ESR 2 –

Creoch Farm

ESR 3 –

Provost

Mount

ESR 4 –

Killochside

ESR 5 – Laigh

Tarburg Farm

Predicted Specific Noise i.e.

Operational noise level of

the Proposed Energy

Recovery Park

47 27 31 30 30

Acoustic Feature Correction 3 3 3 3 3

Predicted Rating level 50 30 34 33 33

Average Background Noise

level for Period

50 35 43-48 42-57 45-60

Lowest Excess of rating over

Background level

+0

-5

-14 -24 -27

Highest Excess of rating

over Background level

-9 -9 -12

Table 11.15: Assessment at Existing Sensitive Receptors – Killoch for Evening Operations of the ERF, between 1800 and 2300 hours


Receptor

ESR 1 –

Killoch

Farm

ESR 2 –

Creoch Farm

ESR 3 –

Provost

Mount

ESR 4 –

Killochside

ESR 5 – Laigh

Tarburg Farm


Operational noise level of

the Proposed Energy

Recovery Park

41 25 30 29 27



Average Background Noise

level for Period

28-42 31 43 38-48 44-55


Background level

-9 -1 -9 -15 -22

Highest Excess of rating

over Background level

+13 -1 -9 -5 -11


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11.8.8 The results in Tables 11.14 and 11.15 indicate that during the daytime and evening

hours of 0700 to 2300, the predicted rating level likely to be generated by the

operations of the proposed development will be below the existing background

noise level at all existing sensitive receptor locations except ESR 1, even during

periods in which the background sound level is at its lowest. Where the rating level

does not exceed the background sound level, this is an indication of the specific

sound source having a low impact, depending on the context.

11.8.9 Noise levels will be equal to background noise levels at ESR 1 during the daytime

period. During the evening period, noise from the ERP will be below background

noise levels at ESR 1 when background levels are highest and above background

levels during the quietest evening period. A difference of around +5dB is likely to be

an indication of an adverse impact, depending on the context. It is therefore

considered that there is likely to be an indication of an adverse or significant

adverse impact, depending on the context at ESR 1.

11.8.10 The context of the assessment is discussed further within this section.

Night-time Assessment

11.8.11 The predicted rating levels for the typical night-time operations between 2300 and

0700 hours have been compared to the background noise levels measured at the

residential receptors. Before assessing the noise levels at receptor facades, 3dB

must be added to the free field background noise level to take into consideration

any reflections for the existing sensitive receptor facades. This will allow for direct

comparisons with the predicted rating levels at receptor facades for the typical

daytime operations between 2300 and 0700 hours. The results for each receptor

location are detailed in Table 11.16.


LE12479/REP-004 May 2015

Table 11.16: Assessment at Existing Sensitive Receptors –Night-time Operations of the ERP, between 2300 and 0700 hours


Receptor

ESR 1 –

Killoch

Farm

ESR 2 –

Creoch Farm

ESR 3 –

Provost

Mount

ESR 4 –

Killochside

ESR 5 – Laigh

Tarburg Farm


Operational noise level of the

Proposed Energy Recovery

Park

40 25 30 29 22



Background Noise level Range

for Period 21-34 18-30 24-32 27-56 34-58


Background level +9 -2 +1 -24 -33

Highest Excess of rating over

Background level +22 +10 +9 +5 -9

11.8.12 The results in Table 11.16 indicate that over the range of background noise levels,

during the night-time hours of 2300 to 0700, the predicted rating level likely to be

generated by the operations of the ERP will be below the existing background noise

level ESR 5 even during the quietest part of the night. Where the rating level does

not exceed the background sound level, this is an indication of the specific sound

source having a low impact, depending on the context.

11.8.13 Noise levels from the ERP at ESR 2 and ESR 4 will be below background levels

during the loudest parts of the night but will exceed background levels during the

quietest parts of the night.

11.8.14 Noise levels from the ERP at ESR 1 and ESR 3 will exceed background noise levels

throughout the night-time period.

11.8.15 A difference of around +5dB is likely to be an indication of an adverse impact,

depending on the context. It is therefore considered that there is likely to be an

indication of an adverse or significant adverse impact during the night-time period

at ESR 1, ESR 2, ESR 3 and ESR 4, depending on the context. Consideration of the

context of noise from the ERP is provided later in this section.


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11.9 BS4142 Context Assessment

11.9.1 The results of the above BS4142 assessments for night-time operations indicate

that the predicted noise levels likely to be generated by the proposed ERP are likely

to cause an adverse or significant adverse impact, during both the daytime and

night-time at ESR 1 and during the night-time at ESR1 to ESR 4.

11.9.2 BS4142:2014 States; “The significance of sound of an industrial and/or commercial

nature depends upon both the margin by which the rating level of the specific

sound sources exceeds the background sound level and the context in which the

sound occurs”.

11.9.3 The first requirement of this statement has been determined within the noise

impact assessment section above. To determine the context in which the proposed

industrial sound will resided three factors must be considered, these are;

The absolute level of sound;

The character and level of the residual sound compared to the character and level of the specific sound (ERP); and,

The sensitivity of the receptor.

Absolute level of Sound

11.9.4 The impact of a given difference between rating level and background noise level

will depend upon whether the residual sound level is low or high.

11.9.5 In order to assess the proposed ERP in the context of its environment and that of

each of the existing sensitive receptors, the predicted sound levels form the ERP

have been added to the measured, average ambient noise levels at the residential

receptors. Before the facade noise levels can be calculated 3dB(A) must be added

to the free field measured background levels to allow for the reflection of sound

from the existing sensitive receptor facades.

11.9.6 The results for each existing receptor location for day and night-time periods are

detailed within Tables 11.17 and 11.18 respectively.


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Table 11.17: Context Assessment at Existing Sensitive Receptors – Killoch for Daytime Operations of the ERP, between 0700 and 2300 hours Figures in dB LAeq

Receptor

ESR 1 – Killoch Farm

Average residual sound level over the noise monitoring period i.e.

Existing sound level without the proposed ERP operations

69

Predicted Specific Noise i.e. Operational noise level of the ERP only 49

Total absolute level of sound i.e. Existing sound level plus ERP sound

level

69

Difference between existing ambient sound levels and predicted future

sound levels

0

Table 11.18: Context Assessment at Existing Sensitive Receptors –Night-time Operations of the ERP, between 2300 and 0700 hours Figures in dB LAeq

Receptor

ESR 1 –

Killoch

Farm

ESR 2 –

Creoch Farm

ESR 3 –

Provost

Mount

ESR 4 –

Killochside

Average residual sound level over the noise

monitoring period i.e. Existing sound level

without the proposed ERP operations

62 40 42 53

Predicted Specific Noise i.e. Operational

noise level of the ERP only 38 25 30

29

Total absolute level of sound i.e. Existing

sound level plus ERP sound level 62 40 42

53

Difference between existing ambient sound

levels and predicted future sound levels 0 0 0

0

11.9.7 The noise likely to be generated by the proposed ERP will not lead to any increase

in the existing ambient noise levels at the nearby sensitive receptors during the

daytime or night-time period. This is a positive indication that noise from the ERP

will not be significant at the existing sensitive receptor locations.


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Character and Level of Residual and Specific Sound

11.9.8 To determine the character and level of the specific sound from the ERP each noise

source has been divided into one of 6 groups. Table 11.19 shows the relative

contribution and level of each area of the ERP at ESR 1 during the daytime.

Table 11.19: Context Assessment at Existing Sensitive Receptors –Daytime Operations of the ERP, between 2300 and 0700 hours at ESR 1 – Killoch Farm. Figures in dB LAeq

ERP Source

Sound Level

Waste Reception Area Building 36

MRF Building 36

EfW Building 31

Turbine Room 15

EfW External Plant 26

HGV Movements 45

11.9.9 Table 11.19 shows that the daytime noise level from the ERP at ESR 1 is dominated

by HGV movements. ESR 1 is located adjacent to the A70 and already experiences

traffic noise levels of over 62dB LAeq throughout the daytime period, as detailed in

Appendix 11.2. The existing noise levels are dominated by the passage of vehicles

on the A70 which includes HGVs accessing and departing the existing Barr site using

the same site access as proposed for the ERP.

11.9.10 Further analysis of the measured background noise levels at ESR 1 also indicate that

for the majority of the daytime period, background noise levels will be above

39dB(A) and that it is only during the late evening period (2200-2300) that

background noise levels will drop to approximately 25dB. Therefore for the

majority of the daytime period noise from all sources at the ERP, with the exception

of HGV movements, will be below background noise levels. As discussed above,

although HGV movements will be above background noise levels throughout the

daytime they will be lower than the noise levels from existing vehicle movements

on the A70 at ESR 1 and will therefore not be out of character when considered in

the context of the existing noise climate at the receptor.

11.9.11 Table 11.20 shows the relative contribution and level of each area of the ERP at ESR

1 to ESR 4 during the night-time.


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Table 11.20: Context Assessment at Existing Sensitive Receptors –Night-time Operations of the ERP, between 2300 and 0700 hours Figures in dB LAeq

ERP Source

ESR 1 – Killoch

Farm

ESR 2 – Creoch

Farm

ESR 3 – Provost

Mount

ESR 4 –

Killochside

Waste Reception Area

Building - - - -

MRF Building 38 22 20 13

EfW Building 35 18 20 25

Turbine Room 15 11 9 10

EfW External Plant 31 18 26 26

HGV Movements - - - -

11.9.12 Table 11.20 shows that the night-time noise levels from the ERP at ESR 1 and ESR 2

are dominated by breakout from the MRF and EfW sections of the ERP. Night-time

noise levels at ESR 3 and ESR 4 will be a combination of breakout from the buildings

as well as the external plant at the EfW (including the stack and external fans).

11.9.13 The existing sensitive receptors currently experience levels of industrial type noise

from the existing Barr premises and nearby farms. These sources of sound will

contain Tonal and Impulsive characteristics and therefore it is considered that the

character of the sound from the ERP will not be dissimilar to the present acoustic

environment.

11.9.14 Mitigation measures will be incorporated into the site design to reduce any tonal

and intermittent characteristics where feasible.

Sensitivity of Receptor and Existing Acoustic Conditions

11.9.15 Based on site observations existing sensitive receptors on the whole appear to be

naturally ventilated with no specific mitigation measures to control noise ingress

from the surrounding area. No receptors incorporate any screening other than

existing landforms that will reduce the noise impact at the location.

11.9.16 The assessment of absolute sound levels indicates that there will be no significant

impact during the daytime and night-time.


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11.9.17 A facade element comprising a solid brick or blockwork, such as the existing

sensitive receptors, will attenuate by 45-50dB (British Standard 8233: “Sound

insulation and noise reduction for buildings – Code of practice” 1999) whereas

standard thermal double glazing will attenuate traffic noise by 26-29 dB(A) (BRE

Digest 379 ”Double glazing for heat and sound insulation). The overall noise

attenuation provided by this combination is, therefore, between 31.9dB(A) and

34.9dB(A).

11.9.18 The existing mitigation provided for these sensitive receptors with windows closed

would ensure that the internal noise levels do not breach the limit for sleeping and

resting conditions 30dB(A) as documented within BS8233:2014.

11.9.19 Taking context into consideration, the impact of the industrial sound will be

negligible at all sensitive receptors during the daytime with the exception of ESR 1

and negligible at ESR 5 during the night. The impact at ESR 1 during the daytime

and night-time, and at ESR 2, ESR 3 and ESR 4 during the night-time is considered to

be moderate due to exceedance of background levels but is considered not to be

significant in the context of the absolute levels and the character of residual noise.

11.9.20 As the threshold between insignificant and significant lies between “Moderate” and

“Substantial”. The impact of the Energy Recovery Park on existing sensitive

receptors is not significant.

11.9.21 The assessment has shown when taking context into consideration there is a

moderate impact at sensitive receptors during the night-time period, with the

facility operating fully. For the majority of the year the MRF would shut down

during the night-time period and therefore the noise impact at the sensitive

receptors is expected to be less than presented within this assessment. The

assessment therefore presents a ‘worst-case’ scenario.

11.9.22 Mitigation measures will be incorporated into the site design to reduce noise

emissions where feasible and Best Available Technology (BAT) will be adopted.

11.10 Mitigation Measures


11.10.1 To minimise the potential levels of noise generated by the construction works, best

working practice would be put in place where possible. The construction works will

follow the guidelines in BS5228-1 and the guidance in BRE Controlling particles,

vapour and noise pollution from construction sites, Parts 1 to 5, 2003.


LE12479/REP-004 May 2015

11.10.2 The following measures will be put in place to minimise noise emissions:

All plant and machinery will be regularly maintained to control noise emissions, with particular emphasis on lubrication of bearings and the integrity of silencers.

Broadband reversing alarms will be chosen instead of tonal alarms.

Site staff will be aware that they are working adjacent to a residential area and avoid all unnecessary noise due to misuse of tools and equipment, unnecessary shouting and radios.

A further measure to reduce noise levels at the sensitive receptors will include, as far as possible, the avoidance of two noisy operations occurring simultaneously in close proximity to the same sensitive receptor.

Adherence to the restriction of operating hours imposed by East Ayrshire Council.

Ensure engines are turned off when possible.

Should construction activities need to be carried out during night-time hours, this will be discussed with the local authority, which may include a planning condition which requests advance notice and details of any night working to provided.

Noise from the Energy Recovery Park

11.10.3 Based on the above assessment of noise, predictive calculations identify that there

is a potential for a significant adverse impact, depending on the context. The

assessment of context has shown that due to the existing ambient noise levels

within the vicinity of the existing sensitive receptors and the characteristics of its

sound the impact at each receptor is not significant.

11.10.4 To reduce the potential impact of noise levels generated by the operational phase

of the development at existing residential receptor locations in the immediate

vicinity of the site, mitigation measures will be incorporated into the design of the

proposed development. In addition BAT will be implemented to ensure that the

noise impact of the operational activities of the proposed facility on existing

receptors is minimised.

11.10.5 Using BAT, specific mitigation will be applied to the operating machinery within the

internal areas of the Energy Recovery Park. It is understood that these mitigation

measures will be put in places to comply with The Control of Noise at Work

Regulations 2005. Once implemented, these measures will ensure that the noise

levels within the vicinity of the operation plant in the ERP buildings will be 80dB(A).

This will have a positive effect on the noise impact experienced at existing sensitive


LE12479/REP-004 May 2015

receptors and can be confirmed through compliance testing at existing sensitive

receptors once the facility is in full operation.

11.10.6 It is recommended that further assessment of noise breakout from the proposed

buildings be undertaken prior to full commencement of operations to confirm the

frequency and sound level of noise breakout with the design of the building

envelope and any other additional mitigation measures implemented as

appropriate to protect the amenity of the nearest sensitive receptors as far as is

practicable. Barr is committed to carrying out these further assessments.

11.10.7 Other mitigation measures will include the implementation of best working

practice to ensure that the impact of the operational activities of the proposed

facilities on existing receptors is minimised.

All plant and machinery will be regularly maintained to control noise emissions, with particular emphasis on lubrication of bearings and the integrity of silencers.

Broadband reversing alarms will be chosen instead of tonal alarms.

Site staff will be aware that they are working in the vicinity of residential properties and avoid all unnecessary noise due to misuse of tools and equipment, unnecessary shouting and radios. Noisy external activities such as cleaning and maintenance will be scheduled to avoid night-time working in the vicinity of sensitive receptors where possible.

Ensure engines are turned off when possible.

11.10.8 In accordance with the requirements of East Ayrshire Council a site noise

monitoring scheme will be implemented at the site prior to commencement of

operations. It is proposed that the site noise monitoring scheme be developed

through consultation with the Environmental Health Department at East Ayrshire

Council and should include the following details:

Proposed Monitoring Locations;

Proposed hours and duration of monitoring;

Frequency of monitoring; and

Appropriate monitoring equipment


LE12479/REP-004 May 2015

11.11 Conclusions

Introduction

11.11.1 This chapter describes an assessment of the potential noise impacts associated

with the proposed Energy Recovery Park.

11.11.2 To establish baseline noise levels, at a number of existing sensitive receptors an

attended noise survey has been carried out.

11.11.3 The potential noise impacts affecting existing sensitive receptors with regard to

construction and operational activities associated with the facility have been

considered, and have been assessed using appropriate guidance. A robust, ‘worst-

case’ scenario has been considered, with the facility operating fully.

11.11.4 Where mitigation measures are required to control potential noise levels from the

facility, details of such measures have been provided in outline terms.


11.11.5 During the construction phase, any work carried out at the proposed development

may generate noise that may propagate beyond the proposed development

boundary.

11.11.6 To minimise the potential levels of noise generated by the construction works, best

working practice will be put in place where possible. The construction works will

follow the guidelines in BS5228-1 and the guidance in BRE Controlling particles,

vapour and noise pollution from construction sites, Parts 1 to 5, 2003.

Development Generated Road Traffic Noise

11.11.7 Access to the site is gained directly from the A70 via the existing site access already

used to route HGVs onto the local road network. It is considered that the additional

HGVs will not significantly increase road traffic noise levels at existing sensitive

receptors as HGV movements from the site already form part of the ambient noise

levels. However vehicle movements on the site have the potential to increase the

ambient noise levels at existing receptors located in the immediate vicinity of the

site, these movements have therefore been considered within this noise

assessment.


LE12479/REP-004 May 2015

Noise from the Proposed Energy Recovery Park

11.11.8 Prediction calculations have been carried out to determine the noise levels likely to

be generated by noise breaking out of the facility building, together with on-site

vehicle movements, at each of the existing residential receptors. Noise levels have

been predicted based on data provided by the technology providers, BS 5228-1,

and Wardell Armstrong’s archive of data from other similar waste facilities.

11.11.9 Based on several assessments, in accordance with BS 4142, it has been found that

there is a potential for operational noise levels to exceed background levels during

the daytime and night-time period at existing sensitive receptors located closest to

the ERP. This is likely to be an indication of an adverse to significant adverse

impact, depending on the context.

11.11.10 The assessment of context has shown that due to the existing ambient noise levels

within the vicinity of the existing sensitive receptors and the characteristics of its

sound the impact at each receptor is not significant during the daytime and night-

time period.

11.11.11 Taking into consideration the noise impact at each sensitive receptor location is

considered to be Negligible to Moderate during both day and night-time periods.

11.11.12 As the threshold between insignificant and significant lies between “Moderate” and

“Substantial”. The impact of the Energy Recovery Park on existing sensitive

receptors is not significant.

Mitigation Measures

11.11.13 Mitigation measures have been presented within this chapter to minimise noise

emissions during construction phase activities.

11.11.14 During the operational phase of the development, BAT will be used to reduce the

potential impact of noise levels generated by the operational phase of the facility.

11.11.15 Other mitigation measures will include the implementation of best working

practice to ensure that the impact of the operational activities of the proposed

facility on existing receptors is minimised.

11.11.16 In accordance with the requirements of East Ayrshire Council a site noise

monitoring scheme will be implemented at the site prior to commencement of

operations. It is proposed that the site noise monitoring scheme be developed

through consultation with the Environmental Health Department.

11 noise and vibration 11.1 introduction - killoch · ‘ode of practice for noise and vibration...

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