an e noise monitoring assessment on behalf of proctor ... · proctor & gamble (manufacturing)...

This report shall not be reproduced except in full, without the approval of Bnm Environmental.

_______________________________________________________________________________________________________

Bord na Móna Environmental Ltd

Registered Office: Main Street, Newbridge, Co Kildare, Ireland. Registered No: 303312, VAT No: IE6323313B

For the Attention of: Mr. Gabriel McCann

Proctor & Gamble (Manufacturing),

Green Road,

Newbridge,

Co. Kildare.

Prepared by: Mr. Peter Coogan

Acoustic Consultant (IOA)

Reviewed by: Mr. Stephen Stapleton

Environmental Scientist

Report No: ECS5386

Monitoring Date: 5th & 6th December 2017

Report Date: 17th January 2018

AN ENVIRONMENTAL NOISE MONITORING ASSESSMENT ON

BEHALF OF PROCTOR & GAMBLE (MANUFACTURING)

IRELAND LTD., GREEN ROAD, NEWBRIDGE, CO. KILDARE.

IPPC LICENCE NO. P0297-02

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Report No. ECS5386

Proctor & Gamble (Manufacturing) Ireland Ltd.

EXECUTIVE SUMMARY

BnM Environmental was commissioned by Mr. Gabriel McCann of Proctor & Gamble (Manufacturing)

Ireland Ltd, in relation to carrying out an environmental noise assessment within the vicinity of the

Newbridge facility in compliance with the requirements of their IPPC Licence (P0297-02).

Triplicate daytime and duplicate night-time noise monitoring was conducted at four boundary locations

and three noise sensitive locations for 15 minute intervals, on the 5th and 6th December 2017. The

acoustic assessment and report are in accordance with International Standard Organisation (ISO)

1996 Acoustics –Part 1, 2, and 3 in addition to the Environmental Protection Agency 2012, “Guidance

note for Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled Activities

(NG4) 2016”.

Condition 8.3 of IPPC Licence P0297-02 states that ‘’Activities on-site shall not give rise to noise levels

off-site, at noise sensitive locations, which exceed the following sound pressure limits (Leq,15

minutes) subject to Condition 3 of this licence:

8.3.1 Daytime: 55 dB(A)

8.3.2 Night-time: 45 dB(A).’’

Condition 3.4.1 ‘’Noise from the activity shall not give rise to sound pressure levels (Leq,15 minutes)

measured at the specified noise sensitive locations which exceed the limit value(s) by more than 2

dB(A).’’

DAY-TIME

Daytime noise measurements (LAeq15mins) at locations AN1A - AN3A ranged from 60 – 63 dB(A). The

predicted specific noise levels at the NSL’s closet to these locations ranged from 55 – 58 dB(A).

The specific noise levels at all noise sensitive locations were compliant with the Licence limits for day-

time noise subject to condition 3.4.1 with the exception of AN2A (58 dB(A)). The dominant source of

noise was attributed to heavy road traffic on the Adjacent M7 motorway and contributed largely to

noise levels. The wind on the day was from a north westerly direction.

There was no clear tonal or impulsive component due to site activity present at any of the noise

sensitive locations.

NIGHT-TIME

Night-time noise measurements (LAeq15mins) at locations AN1A - AN3A ranged from 56 – 59 dB(A). The

predicted specific noise levels at the NSL’s closet to these locations ranged from 42 – 50 dB(A).

The specific noise levels at all noise sensitive locations were compliant with the Licence limits for

night-time noise subject to condition 3.4.1 with the exception of AN2A (50 dB(A)). The dominant

source of noise was attributed to heavy road traffic on the Adjacent M7 motorway and contributed

largely to noise levels. Onsite noise included the continuous hum from dust extractors and the faint

hissing noise coming from dryer house.

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In summary noise levels at the P&G facility are dominated by road traffic on the M7 motorway however

during periods of low background traffic noise, extractions fans on the south facing façade and the

dryer room were the primary subjective noise sources.

Respectively Submitted,

________________________

Mr. Peter Coogan

Acoustic Consultant (IOA)

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TABLE OF CONTENTS

Page Number

1.0 INTRODUCTION 5

2.0 NOISE CRITERIA 6

3.0 METHODOLOGY 6

3.1 MEASUREMENT PARAMETERS 6

3.2 TONAL & IMPULSIVE CHARACHTERISTICS 7

3.3 STANDARDS & GUIDANCE 7

3.4 SITE INFORMATION 7

3.5 MEASUREMENT PERIOD 8

4.0 INSTRUMENTATION/EQUIPMENT USED 9

5.0 RESULTS & DISCUSSION 10

5.1 SITE BOUNDARY RESULTS 12

5.1.1 SITE BOUNDARY DISCUSSION 14

5.2 NOISE SENSITIVE LOCATION RESULTS 17

5.2.1 NOISE SENSITIVE LOCATION DISCUSSION 19

5.2.2 PREDICTED SPL AT THE NEAREST NSL’S 22

5.3 TONAL NOISE ASSESSMENT 25

5.4 ASSESSMENT OF ON-SITE NOISE SOURCES 25

Appendix I Map of all Noise Monitoring Locations

Appendix II Noise Meter Calibration Certificates

Appendix III Frequency Spectra at Noise Measurement Locations AN1 – AN3

Appendix IV Checklist as per NG4

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1.0 INTRODUCTION

The Newbridge based Proctor & Gamble (Manufacturing) Ireland Ltd, facility is licensed by the

Environmental Protection Agency (EPA) under Integrated Pollution Prevention and Control

(IPPC) number PO297-02. The site is located approximately 2.2km directly south of

Newbridge town centre, within the IDA Industrial estate (see Figure 1).

Figure 1 – Location of P&G facility

The facility is bounded by agricultural lands to the East, Industrial to the North, residential to

the West. The Southern perimeter of the facility partially bounds the M7 motorway.

In compliance with IPPC Licence P0297-02, P&G are required to conduct annual noise

monitoring at the site for submission to the agency as part of their Annual Environmental

Review (AER).

BnM Environmental was commissioned to conduct the annual noise survey. An Acoustic

Consultant from BnM Environmental subsequently visited the site on the 5th & 6th December

2017. The survey consisted of measurements representative of noise levels at four boundary

locations and at 3 on-site locations to best represent sound emissions to the nearest noise

sensitive locations by day and by night.

This report details the sampling and analytical methodologies employed and also includes a

broad interpretation of the results obtained.

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2.0 NOISE CRITERIA

In compliance with the requirements of Condition 9 (Noise) of IPPC Licence P0297-02,

Proctor & Gamble (Manufacturing) Ireland Ltd is obliged to;

Condition 8.1 - The licensee shall carry out a noise survey of the site operations annually

Condition 8.3 - Activities on-site shall not give rise to noise levels off-site, at noise sensitive

locations, which exceed the following sound pressure limits (Leq, 15 minutes) subject to

Condition 3 of this licence:

8.3.1 Daytime: Until 2nd May 2000: 60 dB(A)

Thereafter: 55 dB(A)

8.3.2 Night-time: Until 2nd May 2000: 50 dB(A)

Thereafter: 45 dB(A)

Condition 8.4 - There shall be no clearly audible tonal component or impulsive component in

the noise emission from the activity at any noise sensitive location.

3.4 Noise

3.4.1 Noise from the activity shall not give rise to sound pressure levels (Leq,15 minutes)

measured at the specified noise sensitive locations which exceed the limit value(s) by more

than 2 dB(A).

The survey should be undertaken in accordance with the methodology specified in the

‘‘Environmental Noise Survey guidance Document’’ as published by the Agency’’.

3.0 METHODOLOGY

3.1 Measurement Parameters

3.1.1 LAeq Values

LAeq (t) values represent the continuous equivalent sound level over a specified time (t) in the

A weighted scale. This value expresses the average levels over time and is a linear integral.

3.1.2 LAMax Values

The maximum RMS, A-Weighted sound pressure level occurring within a specified time

period.

3.1.3 LA90 and LA10 Values

The LA90 and LA10 values represent the A-weighted sound levels exceeded for a percentage

of the instrument measuring time. LA10 indicates that for 10% of the monitoring period, the

sound levels were greater than the quoted value. LA10 is a good statistical parameter for

expressing event noise such as passing traffic. The LA90 represents post event sound levels

and is a good indicator of background noise levels.

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3.2 Tonal and Impulsive Characteristics

For the purpose of this report, tonal noise is characterised in accordance with Section 5.1 of

the EPA’s NG4 document, which indicates that a noise source is tonal if a 1/3 octave band

exceeds adjacent bands by;

· 15dB in low/frequency 1/3 octave bands (25Hz to 125Hz);

· 8dB in middle/frequency bands (160Hz to 400Hz), and;

· 5dB in high/frequency bands (500Hz to 10,000Hz).

An impulsive noise is of short duration (typically less than one second), it is brief and abrupt,

its’ startling effect causes greater annoyance than would be expected from a simple

measurement of sound pressure level. For example an instantaneous bang/thud that maybe

associated with pile driving, hammering etc.

3.3 Standards and Guidance

The acoustic assessment and subsequent report are in accordance with International

Standard Organisation (ISO) 1996 Acoustics – Description and Measurement of

Environmental Noise Part 1, 2, and 3, in addition to the Environmental Protection Agency

Environmental Noise Survey Guidance Document Revision 4 (NG4) 2016.

3.4 Site information

2.4.1 All measurements were taken at 1.2 -1.5 m height above local ground level and at least 3.5m

away from reflective surfaces other than the ground.

3.4.2 The weather was dry and calm, with a wind-speed of <5ms/sec at the time of the assessment.

3.4.3 Table 2.1 describes the locations of the monitoring positions for the noise survey.

3.4.4 Triplicate noise measurements were obtained at each sampling location during daytime hours

and duplicate measurements during night-time hours, for a minimum time period of 15

minutes, in accordance with the EPA Noise Guidance 4 document

3.4.5 Sampling Locations are presented in Table 3.1 overleaf (Please refer to map included in

Appendix I).

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TABLE 3.1 : LOCATION OF NOISE MONITORING MEASUREMENTS

Map Ref

No.

Location

Type

Grid Ref.

Irish Grid Location

BN1 Boundary IN 80157 IG 13234

Eastern corner, behind facility car-park.


South-East corner of site, along raised grass embankment


Western corner, along raised grass embankment.


North-West corner, within car-park.

AN1A Noise

Sensitive IN 79849 IG 13306

25 Meters from residential dwelling along North-West boundary.

AN2A Noise


20 Meters from residential dwelling within Grange Heights, along South-West Boundary

AN3A Noise


Located along grass embankment on Southern boundary to represent emissions to residents at Grange View (20m)

Note 1 – The grid coordinates of each monitoring station was logged with a handheld Garmin GPS 60.

The units of measurement are Irish Grid (IG).

3.5 Measurement Period

Daytime noise measurements were conducted at each boundary and noise sensitive location

over a one day period. Each location was monitored in triplicate (15mins each).

The night-time noise measurements were conducted between the hours of 11pm and 3.30am.

Each location was monitored in duplicate (15mins each). In addition to this, night time

measurements were taken when the plant was in shutdown.

Measurements were conducted on a rotational basis around the site in order to achieve

representative results.

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Proctor & Gamble (Manufacturing) Ireland Ltd.)

4.0 INSTRUMENTATION EQUIPMENT USED

The following equipment was employed during the acoustic assessments.

Bruel & Kjaer Real–Time Noise Analyzer Type 2250–Light

Model No: 2250–Light

Serial No. 3000428

Certificate and Calibration:

17th November 2016

Calibrator Type: B&K 4231

Serial No: 2415925

Date of Certificate and Calibration:

23rd November 2017

On Site Calibration 05/12/17 6/12/17

Calibration level = 94 dB(A) 94 dB(A)

Sensitivity = 40.60 mV/Pa 40.58 mV/Pa

Deviation before monitoring = -0.05dB 0.01dB

Deviation after monitoring = -0.01dB -0.00dB

A handheld Garmin GPS60 was used to record the grid coordinated of each environmental noise

monitoring location.

A handheld anemometer (Kestrel 2500) was used to take on-site weather measurements on the

day of monitoring.

Certified current annual calibration certificates are provided in Appendix 2.

Note: The monitoring equipment was manned throughout the sampling period and

comments/notes taken to assist the interpretation and assessment of results.

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Proctor & Gamble (Manufacturing) Ireland Ltd.)

5.0 RESULTS AND DISCUSSION

Table 5.1: On–Site Weather Data Recordings / Observations Table 5.2: Site Boundary Noise Monitoring Results – Daytime. Table 5.3: Site Boundary Noise Monitoring Results – Night-time. Table 5.4: Noise Sensitive Location Monitoring Results – Daytime.

Table 5.5: Noise Sensitive Location Monitoring Results – Night-time.

Weather Conditions: Site Data

Table 5.1 below; details the on-site weather conditions observed/recorded on the day/night of the

monitoring events.

TABLE 5.1: WEATHER CONDITIONS ONSITE

Date Rainfall (mm) Mean. Temp 0C

Note 1

Mean Wind

Speed (m/sec) Wind direction

5/12/17 0.0 6 2.9 From NW

6/12/17 0.0 8 1.9 From SW

Note 1: Wind speed, temperature and pressure measurements taken with a calibrated Kestrel

2500 30mm Vane Anemometer (I.D. TS-K-01).

Noise monitoring was conducted in accordance with International Standard Organisation (ISO)

1996 Acoustics – Description and Measurement of Environmental Noise Part 1, 2, and 3 in

addition to the Environmental Protection Agency Environmental Noise Survey Guidance

Document (NG4) at each of the four boundary locations (BN1-BN4) and three Noise Sensitive

Locations (AN1A-AN3A).

Section 7.8 of the EPA’s NG4 document describes methods for estimating the specific noise level

(LART). For the purposes of this report this report the following approach was adopted to determine

the site specific noise;

Boundary Location

The CRTN method for assessing road traffic describes the L10 value as being most representative

value for road traffic noise, which has since become the ‘de facto’ measurement index for

describing road traffic noise. Considering that the road traffic was the dominant source (LA10

values) it is therefore reasonable to assume that the residual noise was due to operations within

the P&G facility (LA90 values) and may therefore be referred to as the specific noise.

Noise Sensitive Locations

The NG4 document states that ‘‘…for facilities that operate continuously for 24 hours, it may be

appropriate to measure at a time when all (or most) other noises have subsided. This will often

mean measuring late at night when general traffic noise has reduced. Where noise output from

the facility can be temporarily eliminated or subdued, it may be possible to estimate the facility’s

specific noise level by measuring the noise level with and without the facility running’’.

This method was adopted to determine the specific noise at these locations. All noise sources

were shut down at the facility for 1 hour to determine the residual noise at these locations.

Specific Noise = Ambient Noise – Residual Noise

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5.1 SITE BOUNDARY RESULTS

Table 5.2 presents the results of the noise monitoring survey carried out at the Proctor & Gamble (Manufacturing) Ireland Ltd. facility during normal day time

activities.

TABLE 5.2: BOUNDARY MEASUREMENT RESULTS (DAY TIME)

Location

No.

Duration

(mins.) Date

Start

Time

LAeq

dB(A)

LA10

dB(A)

LA90

dB(A)

LAFMax

dB(A)

Specific

Noise

dB(A) 1

Comments / Site Observations Summary

BN1 15

7/12/17

14.15 65 66 57 84 57 Site: Dust extractor/water chiller barely audible at times. Staff cars

entering/exiting carpark.

Background: Truck hooking up to parked trailer LAFmax round 1.

Continuous roar of M7 audible continuous and dominant. Operations

in neighbouring facility north. Alarms sounding in distance.

15.31 58 60 57 64 57

16.39 60 61 58 66 58

BN2 15

14.33 66 68 65 72 65 Site: Extractor fan/water chiller faintly audible in absence of

background SPLs.

Background: Sounds pressure levels from M7 motorway continuous and dominant.

15.46 67 68 65 73 65

16.56 67 68 65 72 65

BN3 15

14.53 59 61 57 66 57 Site: Cars parking in temporary car park. Dryer house audible. Low

level audibility of compressor/extractor fans.

Background: Roar of M7 dominant and continuous. House alarms

sounding.

16.03 59 61 57 66 57

17.36 59 61 57 70 57

BN4 15

15.10 60 61 58 75 58 Site: Dust extractor/compressor barely audible

Background: Medium traffic on adjacent Green Rd. dominant.

Vehicles slowing for speed ramp and revving engines on clearance.

M7 motorway audible. Hum from chiller fans in Lilly O Brien’s.

17.14 60 61 58 69 58

16.21 60 62 58 69 58

Note 1 - Specific noise component attributable to the licensed site. Based upon L90 value. This is worst case scenario as L90 would have been influenced by road traffic on the M7 which was continuously audible in the distance (See page 11).

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Table 5.3 presents the results of the noise monitoring survey carried out at the Proctor & Gamble (Manufacturing) Ireland Ltd. facility during normal night-time

activities.

TABLE 5.3: BOUNDARY MEASUREMENT RESULTS (NIGHT-TIME)

Location

No.

Duration

(mins.) Date

Start

Time

LAeq

dB(A)

LA10

dB(A)

LA90

dB(A)

LAFMax

dB(A)

Specific

Noise

dB(A) 1


BN1 15 6/12/17

02.31 53 56 49 68 49 Site: Dust extractor/water chiller audible and continuous.

Background: M7 continuous and clearly audible. Operations in

neighbouring facility north 02.48 53 56 49 63 49

BN2 15

5/12/17 23.56 61 63 57 67 57

Site: Extractor fan/water chiller faintly audible

Background: M7 dominant and constant 6/12/17 00.31 61 63 58 69 58

BN3 15

5/12/17 23.00 60 61 58 65 58 Site: Hum of extractor fan/compressor continuous. Dryer house

audible with high pitch frequency audible.

Background: M7 dominant and continuous. 6/12/17 01.36 56 58 55 63 55

BN4 15 6/12/17

02.14 51 54 58 62 58 Site: Hum of extractor. Dryer room audible.

Background: Occasional traffic on adjacent road. M7 clearly audible and continuous. Dogs barking occasionally Hum from chiller fans in Lilly O Brien’s. 03.21 51 53 48 61 48


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5.1.1 SITE BOUNDARY DISCUSSION

BN1

Monitoring station BN1 is at the Eastern corner of the facility, just behind the car-park. This

location has a clear view of the facility and associated auxiliary equipment along the Eastern

gable of the main building (see Plate 1)

.

Plate 1 – BN1

As can be seen from Tables 5.2 and 5.3, the resultant SPL’s were 58 - 65 dB(A) daytime and 53

dB(A) night-time during both measurements. Road traffic on the adjacent M7 motorway was

continuous and dominance. Audible on-site activity included; dust extractor/water chiller being

faintly audible at times during the day and audible at night-time.

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BN2

Monitoring location BN2 is located along a raised grass embankment at the Southern corner of

the P&G facility. This monitoring station has a partial view of the P&G facility (seen Plate 2).

Plate 2 – BN2

As can be seen from Tables 5.2 and 5.3, the resultant SPL’s ranged from 66 - 67 dB(A) during

the daytime and 6 dB(A) during the night-time hours. On site field notes showed that passing

traffic on the M7 motorway was the dominant noise source during the day/night time monitoring.

The only source of on-site noise was due to the air extraction fans, which were occasionally faintly

audible during the daytime events in the absence of M7 traffic. During night-time events the air

extractor fans were faintly audible according to field notes.

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BN3

Monitoring location BN3 is located along a raised grass embankment, at the Western corner of

the facility (see Plate 3).

Plate 3 – BN3

As can be seen from Tables 5.2 and 5.3, the resultant SPL’s for day-time noise was 59 dB(A) for

all daytime measurements and 56/60 dB(A) during the night-time hours. On site field notes

showed that passing traffic on the M7 motorway was the dominant noise source during the

day/night time monitoring events.

The only source of on-site noise was a continuous low level hum from the dust extractor and

compressor which was occasionally audible during the day. The audibility of the dust extractor

and compressor was more prominent during night-time and low levels of passing traffic on the M7

motorway.

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BN4

Monitoring location BN4 is located within the North-West car-park, in front of fire assembly point A

(see Plate 4 below).

Plate 4 – BN4

As can be seen from Tables 5.2 and 5.3, the resultant SPL’s for day-time noise was 60 dB(A) on

all daytime measurements. The night-time SPL’s was 51 dB(A) respectively. On site field notes

showed that occasional passing traffic on the IDA entrance Rd. (20m) and passing traffic on the

Green Road were the dominant sources of noise during the day-time monitoring event and

included the slowing and subsequent revving of vehicles passing over the speed ramp. During the

night-time monitoring event the dominant source of noise was due to road traffic on the M7 (low

level) and occasionally Green Rd. Audible site activity included dust extractor/compressor faint

audibility during daytime events and dryer room during the night-time event.

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5.2 NOISE SENSITIVE LOCATION RESULTS

Table 5.4 presents the results of the noise monitoring survey carried out at the Proctor & Gamble (Manufacturing) Ireland Ltd. facility during normal day time

activities.

TABLE 5.4: NOISE SENSITIVELOCATION RESULTS (DAY TIME)

Location

No.

Duration

(mins.) Start Time

LAeq

dB(A)

LA10

dB(A)

LA90

dB(A)

LAFMax

dB(A)

Specific

Noise

dB(A) 1

Predicted

SPL to

nearest NSL

dB(A) 2


AN1A 15

10.35 60 61 59 76 59 <55 Site: Dryer house with high pitch frequency audible.

Continuous low level hum from extractor/compressor.

Background: Continuous roar of M7. Dog barking

intermittently from nearby dwelling. Occasional bird

song.

11.45 60 61 59 67 59 <55

12.35 62 63 59 68 59 <55

AN2A 15

10.18 62 63 61 80 61 <58 Site: Dryer house audible with high pitch frequency

audible. Continuous low level hum from

extractor/compressor.

Background: M7 intermittently dominant and

continuous.

11.29 61 62 60 67 60 <57

12.19 62 63 61 66 61 <58

AN3A 15

11.11 62 64 61 70 61 <56 Site: Extractor fan audible during absence of

background SPL’s

Background: Continuous roar of M7 dominant and

drowning out site SPL’s. Occasional Birds singing

overhead.

12.04 62 64 61 72 61 <56

12.52 63 64 61 69 61 <56


Note 2 - Calculated noise level at the nearest NSL (see Section 5.2.2 on page 23 of this report for calculation methodology)

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Table 5.5 presents the results of the noise monitoring survey carried out at the Proctor & Gamble (Manufacturing) Ireland Ltd. facility during normal night-time

activities.

TABLE 5.5: NOISE SENSITIVELOCATION RESULTS (NIGHT-TIME)

Location

No.

Duration

(mins.)

Start

Time

LAeq

dB(A)

LA10

dB(A)

LA90

dB(A)

LAFMax

dB(A)

Specific

Noise

dB(A) 1

Predicted SPL to

nearest NSL

dB(A) 2


AN1A 15

23:10 58 60 54 72 Measurement during plant shut-down – M7 Dominant and continuous. Dogs barking

in background.

01:55 58 59 57 65 513 47 Site: Dryer house with high pitch frequency

audible. Continuous low level hum from

extractor/compressor.

Background: M7 continuous SPL’s. 03.05 58 60 56 65 513 47

AN2A 15

23.26 55 58 50 65 Measurement during plant shut-down – M7 motorway traffic dominant.

01.05 57 58 55 65 53 50 Site: Continuous hum from dust extractor audible. Faint hissing noise coming from dryer house. Background: M7 dominant and Continuous. 01.35 56 58 54 63 49 42

AN3A 15

23.43 60 62 56 68 Measurement during plant shut-down – M7 motorway traffic dominant.

00.15 59 62 55 67 523 47 Site: Hum of dust extractor audible with faint

whistling noise.

Background: M7 dominant and continuous. 00.48 58 61 51 71 513 46

Note 1 - Specific noise component attributable to the licensed site. Calculated by subtracting the residual noise from the ambient noise (See page 11). Note 2 - Calculated noise level at the nearest NSL (see Section 5.2.2 on page 23 of this report for calculation methodology)

Note 3 – Ambient noise is less than background noise, Therefore the Specific Noise must be at least 7dB(A) less than the ambient noise.

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4.2.1 NOISE SENSITIVE LOCATION DISCUSSION

AN1A (27 Meters from residential dwelling along North-West boundary)

Monitoring station AN1A is located along the North-West boundary, beside the air cooled

condenser units. This location was chosen to best represent sound emissions to an occupied

residential dwelling; situated 27 meters North-West of this monitoring station (see Plate 5).

Plate 5 – AN1A

As can be seen from Tables 5.4 and 5.5, the resultant SPL’s were 60 – 62 dB(A) daytime and 58

dB(A) night-time. On site field notes showed that passing traffic on the M7 motorway was the

dominant noise source of off-site noise during the day/night time monitoring events. During both

day and night time events the dryers, extractors and compressors were audible.

To determine the predicted sound pressure levels to the nearest NSL, and to determine the

compliance status with IPPC licence P0297-02, please refer to Section 5.2.2 (Predicted SPL at

nearest NSL).

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AN2A

Monitoring location AN2A is located along a raised grass embankment, along the South-West

perimeter the facility (see Plate 6).

Plate 6 – AN2A

This location was chosen to best represent sound emissions to the nearest residential dwelling;

situated approximately 20 meters South-West of this monitoring station, within the Grange Heights

housing estate.

As can be seen from Tables 5.4 and 5.5, the resultant SPL’s for day-time noise ranged from 61 -

62 dB(A). The night-time SPL’s recordings were 56/57 dB(A). On site field notes showed that

passing traffic on the M7 motorway and traffic on the adjacent Green Rd. were the dominant

noise source during the day/night time monitoring events. Sources of on-site noise included the

faint hissing noise from the dryer room and the continuous low level hum from the dust extractor

which was audible during night time events during periods of low passing traffic on the M7.



nearest NSL).

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AN3A (Located along grass embankment on Southern boundary to represent emissions to

residents at Grange View).

Monitoring location AN3A is located along a raised grass embankment, along the Southern

perimeter the facility (see Plate 7).

Plate 7 – AN3A

This location was chosen to best represent sound emissions to the nearest residential dwelling;

situated approximately 20 meters West of this monitoring station, within the Grange View housing

estate.

As can be seen from Tables 5.4 and 5.5, the resultant SPL’s ranged from 62 - 63 dB(A) during

the day-time and 58/60 dB(A) during the night-time. On site field notes showed that passing traffic

on the M7 motorway (60m to nearside carriageway) was the dominant sources of noise in both

the daytime and night-time monitoring events.



nearest NSL).

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5.2.2 PREDICTED SPL AT THE NEAREST NSL’S

Condition 8.3 of IPC Licence P0297-02 states that ‘’Activities on-site shall not give rise to noise

levels off-site, at noise sensitive locations, which exceed the following sound pressure limits

(Leq,15 minutes) subject to Condition 3 of this licence:

8.3.1 Daytime: 55 dB(A)


Condition 3.4.1 ‘’Noise from the activity shall not give rise to sound pressure levels (Leq,15

minutes) measured at the specified noise sensitive locations which exceed the limit value(s) by

more than 2 dB(A).’’

It order to establish compliance with these conditions, the following approach has been employed;

Step 1 – Establish ambient SPL on site at 3 on-site locations (AN1A-AN3A) during typical daytime

and night-time hours.

Step 2 – Establish the residual SPL on site at 3 onsite locations (AN1A-AN3A) during typical daytime

and night-time hours when the all noise sources within the P&G facility are shut down.

Step 3 – Establish the specific SPL on site at 3 onsite locations (AN1A-AN3A) during typical daytime

and night-time hours by subtracting the residual noise from the ambient noise at each

location. Specific Noise = Ambient Noise – Residual Noise

Step 4 – Use the known specific noise at the 3 on-site locations to extrapolate the SPL at the

nearest noise sensitive locations. The following methodology is employed;

In order to represent the worst case scenario the highest specific noise established for each

location (AN1A - AN3A) during the day/night is taken to be the noise emission exclusively due to

activity within the P&G facility during these times. It is also worth noting that the topography of the

landscape is undulating, with a 7 foot soil berm between the source and receiver. All measurements

were conducted on-top of this soil berm to represent the worst possible scenario (I.e. a direct line of

sight from source to receiver). There is also some soft grassland and some mature deciduous trees

along the site boundary, which are not taken into consideration for the purposes of this calculation.

To predict the noise level at the nearest NSL’s due to activity within P&G, the reference sound

pressure level at known distance (R1) was determined. This reference pressure level at R1 is

then used to determine the SPL at a given distance R2 to represent the SPL at the nearest NSL’s.

Predictions shall be carried out by employing the inverse square law, which is a “rule-of-thumb”

used to calculate the expected reduction in noise levels as one moves away from the source.

Generally, as one doubles the distance from the source, a reduction of 6 dB is expected. Within a

confined space however, this rule does not apply due to reflection, where a diffuse field is set up

at a level higher than that expected from this law.

The Inverse Square law is defined as.

Lp2 = Lp1 - 20 Log (R2/R1) where:

Lp2 is the calculated sound pressure level at R2 meters towards the receiver location

(NSL).

Lp1 is the measured reference sound pressure level at R1 meters from P&G

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AN1A (Where R1 = 72 and R2 = 48)

Daytime – R1 Lp2 = Lp1 - 20 Log (R2/R1) = 59 – 20 Log (72/48) = 55.48 ≈ <55 dB(A)



Night-time Lp2 = Lp1 - 20 Log (R2/R1) = 51 – 20 Log (72/48) = 47.47 ≈ <47 dB(A)


The extrapolated SPL for day-time (<55 dB(A)) succeeds and meets the daytime limit of 55dB(A).

The night-time noise level at the nearest NSL (<47 dB(A)) fails to meet the limit set out under

conditions;


Measurements taken satisfies Condition 3.4.1 ‘’Noise from the activity shall not give rise to sound

pressure levels (Leq,15 minutes) measured at the specified noise sensitive locations which

exceed the limit value(s) by more than 2 dB(A).

Conclusion = Compliant

AN2A (Where R1 = 59 and R2 = 80)

Daytime Lp2 = Lp1 - 20 Log (R2/R1) = 61 – 20 Log (80/59) = 58.35 ≈ <58 dB(A)





The extrapolated SPL for the day-time measurement (<57-<58 dB(A)) exceed the daytime limit of

55dB(A). The night-time noise level at the nearest NSL ranged from <42-45 dB(A) one of which fails

to meet the limit of 45dB(A).

Three of the measurement taken do not satisfy Condition 3.4.1 ‘’Noise from the activity shall not

give rise to sound pressure levels (Leq,15 minutes) measured at the specified noise sensitive

locations which exceed the limit value(s) by more than 2 dB(A).

Conclusion = None Compliant

AN3A (Where R1 = 51/75 and R2 = 91)






The extrapolated SPL for day-time (<56- dB(A)) fails to meet the daytime limit of 55dB(A).

The night-time noise measurements taken ranged (<46-<47) dB(A). Measurements taken satisfies

Condition 3.4.1 ‘’Noise from the activity shall not give rise to sound pressure levels (Leq,15

minutes) measured at the specified noise sensitive locations which exceed the limit value(s) by

more than 2 dB(A).

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Although SPL’s are above stated limits and conditions the cause of exceedance was subjectively

identified as traffic from the M7 motorway and not due to site activities.

Conclusion = Compliant

5.3 Tonal Noise Assessment

For the purpose of this report, tonal noise is characterised in accordance with Section 5.1 of the

EPA’s NG4 document, which indicates that a noise source is tonal if a 1/3 octave band exceeds

adjacent bands by;

· 15dB in low/frequency 1/3 octave bands (25Hz to 125Hz);

· 8dB in middle/frequency bands (160Hz to 400Hz), and;

· 5dB in high/frequency bands (500Hz to 10,000Hz).

A desktop analysis of the spectral content for each monitoring location was conducted. It was

found that there was no tonal noise present during the daytime or night-time monitoring location.

The frequency graphs for each noise sensitive location are presented in Appendix III of this

report. Frequency graphs for the four boundary monitoring locations are available upon request.

5.4 Assessment of on-site Noise Sources

In order to determine the sound power level (Lw) of the principal environmental noise, associated

with activity within the P&G facility, noise measurements were conducted at 5 pieces of equipment at

a reference distance of 1 meter. The results of the assessment are presented in tabular format

below.

TABLE 5.6: Sound Power Level of on-site Noise Sources

Source Description Ref. Distance LAeq (dB)

NS1 AHU5 – Chilled Water 1 meter 80

NS2 VS1 – Dust Extract 1 meter 78

NS3 Toothbrush Compressor

House 1 meter 69

NS4 VS1 – Air Cooled

Condensers 1 meter 73

NS5 Dust Extract Chamber –

4m above ground 1 meter 79

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Appendix I

Map of all Noise Monitoring Locations

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Appendix III

Frequency Spectra at Noise Measurement Locations AN1 – AN3

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AN1A – Day

AN1A – Night

16 31.5 63 125 250 500 1k 2k 4k 8k 16k 31.5k

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LAeq: 11.4 dB

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LAeq: 48.9 dB

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Plant Shut Down

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AN2A – Day

AN2A – Night

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AN3A – Day

AN3A - Night

16 31.5 63 125 250 500 1k 2k 4k 8k 16k 31.5k

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LAeq: 51.7 dB

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LAeq: 48.9 dBPlant Shut Down

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Appendix IV

Noise Meter Calibration Certificates

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Appendix III

Checklist as per NG4 Guidance Document

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Item Included

Yes () – No (X)

Manufacturer, model type and serial number of the sound level meter, calibrator and microphone used for annual survey.

The type of windshield and other microphone attachments used.

The date the equipment was last calibrated to a traceable standard

Calibration before and after the measurements

The frequency weighting networks and meter response time (i.e. fast or slow)

A description of the measurement site and of the range of sound sources including the type of sound (continuous, intermittent, impulsive, tonal).

Measures to exclude extraneous noise and reference to the methodologies followed throughout the survey.

A map of the measurement site showing the locations of the measurement positions.

Photographs illustrating the positioning of the sound level meter (recommended but optional).

Details of the intervening ground between sources and measurement positions and the presence of barriers etc.

The time and date of the measurement.

A description of the meteorological conditions

The background noise level (where practicable).

The names of the person/s that undertook the survey and drafted the survey report.

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