Noise Impact Assessment - Wakefield Film/Appendix 4 - Acoustic Report.pdfBS4142:2014, as a...

Noise Assessment Report

Rev. 0 12/03/2019

Noise Impact Assessment

Project Reference Number: PA789

Report Reference Number: KD1701193NR

Assessment Standards: BS4142:2014

Client: Arrow Film Converters Ltd.

Site: 3 Speedwell Road, Whitwood, Castleford, West Yorkshire,

WF10 5PY

Written By Checked By

K. Donald, BSc (Hons) TechIOA T. Hegan BSc (Hons) AMIOA

Acoustic Consultant Acoustic Consultant

[email protected] [email protected]


K. Donald, BSc (Hons) TechIOA T: 01625 667989 Page 3 of 16

Contents Project Information............................................................................................................................... 4

Assessment Summary ........................................................................................................................... 5

1. Noise Sources ................................................................................................................................ 6

2. Subjective Impressions ................................................................................................................. 6

3. Existing Context ............................................................................................................................ 6

4. NSR Location ................................................................................................................................. 7

5. Measurement Equipment ............................................................................................................. 7

6. Weather Conditions ...................................................................................................................... 8

7. Measurement Procedure .............................................................................................................. 8

8. Specific Sound Level ...................................................................................................................... 8

9. Background Sound Level ............................................................................................................... 8

10. Rating Level ............................................................................................................................... 9

11. Rating Level vs Background Level ............................................................................................ 10

12. Mitigation ............................................................................................................................... 10

13. Conclusion ............................................................................................................................... 11

14. Uncertainty ............................................................................................................................. 11

Appendix A - Measurement Details .................................................................................................... 12

Appendix B - Equipment Details ......................................................................................................... 12

Appendix C - Meteorology Details ...................................................................................................... 12

Appendix D - Calibration Details ......................................................................................................... 12

Appendix E – BS4142:2014 Calculations ............................................................................................. 13

Appendix F – Background Sound Level Measurements ...................................................................... 14

Appendix G – Technical Data Sheet .................................................................................................... 15



Project Information

Peak Acoustics have been commissioned to undertake the assessment detailed within this report. Below is a summary of pre-commencement requirements and comments as communicated to Peak Acoustics by involved parties, this information forms the basis of the assessment and report.

Client Contact John Graham, Arrow Film Converters Ltd.

Client Requirement A noise assessment is required to predict the noise impact from the

proposed operation of a Regenerative Thermal Oxidiser (RTO) at 3

Speedwell Road, Whitwood, Castleford, West Yorkshire, WF10 5PY.

Site details as communicated by client.

The Regenerative Thermal Oxidiser (RTO) is proposed to be installed

approximately 62m from the nearest noise sensitive receptor (NSR).

Selected Methodology ‘BS4142:2014 – Methods for rating and assessing industrial and commercial sound’ is a recognised standard for assessing the noise impact of fixed plant machinery via relation of noise emissions to current background noise levels.

Local Authority Contact N/A

Local Authority Consultation

N/A

Local Authority Guidance/Unitary Development Plans/Unique or bespoke standards

N/A



Assessment Summary

A Noise Impact Assessment has been undertaken at Arrow Film Converters Ltd., 3 Speedwell Road,

Whitwood, Castleford, West Yorkshire, WF10 5PY to assess the noise impact from proposed

operation of a Regenerative Thermal Oxidizer (RTO).

Environmental noise levels were measured on site over a weekday period from 21st – 22nd February

2019 to identify the existing background noise levels representative of the nearest Noise Sensitive

Receptor. A representative night-time background level has been determined as 48.8 dB LA90,15min.

Noise levels of the proposed source were calculated to the nearest Noise Sensitive Receptor, a

residential dwelling located on Whitwood Lane, approximately 62m from the proposed location of

the RTO. The Rating Level was predicted to be 10.9 dB above the representative background noise

level. In order to achieve a ‘Low Impact’, supplies of the RTO are recommended to implement design

measures to achieve a minimum of 10.9 dB sound attenuation.

Provided that the requisite sound attenuation is achieved, the proposal would be unlikely to cause

adverse noise impacts upon the surrounding residential community.



1. Noise Sources

1.1 The following noise source is proposed to be operate at Arrow Film Converters Ltd.

• Babcock & Wilcox - Regenerative Thermal Oxidizer (RTO)

1.2 It is understood that the equipment will operate 24hrs a day.

1.3 The technical data sheet for the proposed equipment can found in Appendix G.

2. Subjective Impressions

2.1 The residual climate at the NSR location is dominated by road traffic noise from Whitwood

Lane which passes between the site and NSR location. Noise currently associated with the site

was noted and included vehicles entering / leaving Whitwood Enterprise Park. Secondary

noise sources were noted as birdsong.

3. Existing Context

3.1 Arrow Film Converters Ltd. are manufacturers of printed films for the food and drinks

industry. The Regenerative Thermal Oxidizer is to be used for ventilation and pollution control

due to manufacturing processes undertaken by Arrow Film Converters.

3.2 The site can operate 24hrs a day throughout the week.



4. NSR Location

4.1 The nearest NSR has been identified as a residential dwelling located on Whitwood Lane.

Figure 1: NSR, Background Sound Measurement and proposed RTO location

NSR Background Measurement Location

Regenerative Thermal Oxidiser (RTO) Proposed Location (indicative)

5. Measurement Equipment

5.1 Measurements were undertaken using a calibrated class 1 sound level meter. Full equipment

details can be found in Appendix B.

5.2 The calibrator reference level was 114.0dB. Full calibration details can be found in Appendix

D.

N



6. Weather Conditions

6.1 Wind speeds of 5 – 6ms-1 SW and temperatures of 13°C were recorded on site. Full

meteorological conditions are detailed in Appendix C.

7. Measurement Procedure

7.1 Noise measurements were undertaken over a weekday and night period from 21st – 22nd

February 2019.

7.2 The microphone was placed approximately 1.6m from ground level within the car park of

Arrow Film Converters Ltd, deemed to be representative of the noise climate at the Noise

Sensitive Receptor, as shown in Figure 1.

7.3 Measurements of LA90 were logged in 5-minute intervals. Measured noise levels are shown in

Appendix E.

8. Specific Sound Level

8.1 The specific sound level is denoted LAs and is the A-weighted, equivalent noise level at the NSR

location over the reference time period due to the ambient noise sources.

8.2 Full calculations are shown in Appendix F

8.3 The specific sound level is calculated as 55.7 dB LAs.

9. Background Sound Level

9.1 As the Regenerative Thermal Oxidiser will operate at any time, the assessment will consider

night-time criteria.

9.2 The lowest background sound levels were measured between 01:40 – 01:55 as 48.8 dB

LA90,15min.

9.3 Background sound level measurements are shown in Appendix E.



10. Rating Level

10.1 The specific sound level may be corrected for certain characteristics that make a sound more

noticeable at the NSR location. Corrections for tonality, impulsivity and intermittency may be

applied.

10.2 Some elements of the RTO are expected to emit tonal noise (e.g. Electric Fan Motors). As the

specific sound level is above the residual noise level, these tones are likely to be perceptible at

the NSR location therefore a + 4 dB correction has been applied in accordance with

BS4142:2014, as a worst-case scenario.

10.3 The equipment operates continuously and does not emit impulsive noise (e.g. bangs, clangs

etc.) therefore penalties for intermittency and impulsivity are not deemed appropriate.

10.4 The resultant sound rating level is tabulated below:

Table 3: Sound Rating Level

Specific Sound Level, dB LAs Penalty, dB Rating Level, dB LAr

55.7 +4 59.7



11. Rating Level vs Background Level

11.1 The rating level is to be compared to the background sound level to determine the resultant

noise impact in accordance with BS4142:2014:

A Sound Rating Level at or below the background noise level is indicative of Low Impact;

A Sound Rating Level that exceeds the background noise level by around + 5dB is likely an

indication of Adverse Impact, depending on the context;

A Sound Rating Level that exceeds the background noise level by around + 10dB is likely an

indication of Significant Adverse Impact, depending on the context;

11.2 The noise impact is tabulated below:

Table 4: Noise Impact

Rating, dB LAr Background, dB LA90 Difference, dB Impact

59.7 48.8 10.9 Significant Adverse

11.3 The rating level of the proposed Regenerative Thermal Oxidiser (RTO) is above the the

representative background noise level by a factor of 10.9 dB, which is indicative of a

‘Significant Adverse impact’ in accordance with BS4142:2014.

11.4 No significant contextual factors have been identified which would alter the initial estimation

of the noise impact indicated by the relationship of the Rating Level against the Background

Level.

12. Mitigation

12.1 In order to achieve a ‘Low Impact’ rating in accordance with BS4142:2014, mitigation

measures must be designed and implemented to achieve at least 10.9 dB sound attenuation.

This corresponds to a Sound Pressure Level of 74.1 dB(A) at 1.5m from the machine.



13. Conclusion

13.1 A noise impact assessment has been conducted for the operation of a Regenerative Thermal

Oxidiser (RTO) at Arrow Film Converters Ltd, 3 Speedwell Road, Whitwood, Castleford, West

Yorkshire, WF10 5PY.

13.2 Noise levels generated by the Regenerative Thermal Oxidiser (RTO) would be above the

corresponding existing background noise level at the nearest NSR, indicative of a Significant

Adverse Impact when assessed using BS4142:2014.

13.3 It is recommended that the suppliers of the RTO implement design measures to achieve at

least 10.9 dB attenuation of noise levels in order to achieve a ‘Low Impact’ rating.

13.4 Provided that the required attenuation of noise levels is achieved, the proposed RTO is

unlikely to cause adverse impacts upon Noise Sensitive Receptors

14. Uncertainty

14.1 The monitoring equipment is subject to a 1dB error margin, however calibration before and

after measurements allows the drift within the margin to be monitored and thus

demonstrates that minimal drift occurred throughout the measurements.

14.2 Uncertainty can arise when predicting noise levels using manufacturer data and distance-

correction formulas, however these are acceptable methods when a noise source is not yet

installed. Uncertainty in this regard has been offset by assessing noise levels to the lowest

representative background noise level. Periods whereby background noise levels are higher

would result in a decreased noise impact.



Appendix A - Measurement Details Measurement Kit Start Date Start Time End Date End Time

M1 A4 21/02/19 11:15 22/02/2019 11:40

Appendix B - Equipment Details Kit Equipment Make Model Class Serial Number

A4 Sound Meter Svantek 971 1 60688

A4 Pre-Amp Svantek SV18 1 62781

A4 Calibrator Svantek SV31 1 90273

Appendix C - Meteorology Details

Measurement Temp C Wind Speed

m/s

Wind

Direction Humidity % Precipitation mm Cloud Cover

(Oktas)

M1 13 5 – 6 WSW 81 0 5/8

Appendix D - Calibration Details

Measurement Calibrator Ref Level

(dB)

Level Before

(dB)

Deviation Before

(dB)

Level After

(dB)

Deviation After

(dB)

M1 114.0 114.5 -0.5 114.5 -0.5



Receiver BS4142 Corrections BG

Location - NSR 1 Unit Sound Pres. Dist. Dist. Dist. Corr. Screening Hard Gnd Level Tonal'y Impul'y Inter'y Rating night Diff.

LpA r1, m r2, m dB dB dB dB LAs dB dB dB dB LAr dB LA90,T dB

Whitwood Lane RTO (Regenerative Thermal Oxidiser) 85.0 1.5 62.0 -32.3 0.0 3.0 55.7 4.0 0.0 0.0 59.7

Total: 59.7 48.8 10.9

Appendix E – BS4142:2014 Calculations

Point Source Distance Attenuation Equation:

𝐿2 = 𝐿1 + 20 × log (𝑟1𝑟2

)

Where L2 is the distance corrected level, L1 is the measured level, r1 is the distance between the source and measurement location; and r2 is the distance between the source and receptor location

Specific & Rating Level Calculations:



Appendix F – Background Sound Level Measurements

Measured Background Noise Levels, 21st - 22nd February 2019



Appendix G – Technical Data Sheet

Let us introduce ourselves Peak Acoustics formed in 2011, we are a fully accredited specialist consultancy and testing organisation.

We are a diverse team of Acoustic Consultants, Specialist Engineers and Building Compliance Technicians, with a network spanning the UK. We are proud to offer our services nationally, with no job too big or small.

We provide Acoustic Consultancy, Building Compliance Testing and Energy Services.

Additional Services We offer an extensive range of services in the sectors of Acoustic Consultancy, Building Compliance & Energy Efficiency. We are able to put together custom packages combining multiple services which saves both time and money for you.

Building Compliance

• Sound Insulation Testing • Air Tightness Testing • Ventilation Testing • Water Efficiency Calculations • Sound Insulation Specification

Energy Efficiency

• SAP Calculations • EPC’s • SBEM Calculations • Energy Statements • Sustainability Statements • MEES Regulations • Commercial EPC’s

OUR ADDED VALUE We combine our detailed knowledge of building regulations with our technical understanding of building physics, acoustics and environmental sciences to maximise development quality. Our work ensures appropriate strategies and studies are prepared to demonstrate to demonstrate to local authorities how proposed developments will be of high quality and generate acceptable impact on the surrounding environment.

Peace of mind We are accredited and registered by all the relevant major UK authorities to provide the services we offer. Peak Acoustics is UKAS accredited for sound insulation testing, ATTMA registered for Air Leakage Testing. and our Energy team are all Domestic On-Completion Energy Assessors.

Contact Us Head Office: Peak Acoustics Fernbank House Springwood Way, Macclesfield, SK10 2XA Tel: 0330 043 1764 Email: [email protected] Website: acousticsurveys.co.uk Opening hours Mo-Fr: 8:30 – 17:30

Acoustic Consultancy

• Noise Assessment for planning conditions

• Construction site noise monitoring

• Noise at work assessments • Noise & Vibration Impact

Assessments

Noise Impact Assessment - Wakefield Film/Appendix 4 - Acoustic Report.pdfBS4142:2014, as a...

Documents

Transcript of Noise Impact Assessment - Wakefield Film/Appendix 4 - Acoustic Report.pdfBS4142:2014, as a...