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BHP/CEM/23/A
Client:Oxigen Environmental LtdMerrywell Industrial EstateBallymount Road LowerDublin 22
FAO: Susan Mahon
TEST REPORT
BHPRefNo.: 86821Order No.:Date Received: 09th June 2009Date Completed: 09th June 2009Test Specification: Noise Monitoring
AnalysingTestingConsultingCalibrating
131-11:»BHPNew RoadThomondgateLimerickIrelandTel +35361 455399Fax + 353 61 455447EMail [email protected]
Item: Noise survey at Noise Sensitive Locations near the Oxigen operation located atBallymount Materials Recovery Facility
For and on behalf of BHP Ltd.
Pat O'SullivanDate Issued: 27th April 2010Su lement to re ort No. N/A
Test results relate onl to this item.
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Contents
Section 1: Baseline Noise Study
1.0 Scope
2.0 Survey Approach
3.0 Date of sampling
4.0 Results4.1 Noise levels4.2 Broadband Analysis4.3 1/3 Octave Frequency Analysis
5.0 Interpretation of results5.1 Noise Levels
5.1.1 Daytime levels5.1.2 Night time levels
6.0 Conclusions
Appendix A: Map showing noise sensitive locations
Appendix B: Photographs indicating noise monitoring locations
Section 2: Assessment of Predicted Noise Levels on the proposed treatment shed
1.0 Introduction
2.0 Impact on the surrounding environment (operational and construction phase)
3.0 Proposed noise mitigation measures
Noise Emission Control MeasuresSite Noise Emission Control ChecklistProjected Noise Monitoring locations
Conclusions and Recommendations of the Study
References
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Section 1: Baseline Noise Study
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1.0 Scope of survey
At the request of Oxigen Environmental Ltd, BHP undertook noise monitoring at theoperation at Ballymount Materials Recovery Facility, Ballymount Road Lower,Dublin 22. The purpose of this survey was to provide Oxigen with the noise data andanalysis required as part of the planning requirements outlined here:
- Noise due to the normal operation of the development expressed as Laeq over 15minutes in a noise sensitive location, shall not exceed the background level for thenight time.- Noise due to the normal operation of the development expressed as Laeq over 1 hourat the fac;ade of a noise sensitive location, shall not exceed the daytime backgroundlevel by more than 10 d B (A).
This report deals with one noise sensitive location in the area around the Oxigenoperation at Ballymount.
2.0 Survey approach
A Larson Davis System 824 Type 1 sound level meter was used to monitor noiselevels.Monitoring and the interpretation of acquired data is to the following standards:
British Standard: BS 7445 Part 1: 1991 (ISO 1996-1: 1982) Description andmeasurement of Environmental Noise. Part 1. Guide to quantities and procedures.British Standard: BS 7445 Part 2: 1991 (ISO 1996-2: 1987) Description andmeasurement of Environmental Noise. Part 2. Guide to the acquisition of datapertinent to land use.British Standard: BS 7445 Part 3: 1991 (ISO 1996-3: 1987) Description andmeasurement of Environmental Noise. Part 3. Guide to application to noise limits.
Two 60-minute daytime levels were measured at the noise sensitive location. Thelocation was labelled NSLI and is identified on the map included in Appendix 1.
Appendix 2 contains photographs of noise monitoring equipment at the monitoringpoint.
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3.0 Date of sampling
Daytime monitoring was carried out on the 9th of June 2009. Night-time monitoringwas carried out on the 09th of June 2009.
4.0 Results
4.1 Noise levels:
Levels are presented on the following pages.
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Day-time Measurements - Noise Sensitive Locations - Oxigen, Ballymount (09th June 2009)(Normal operation of the site)
Location Sampling Duration LAEQ LAlO LA90 Wind speed Sampling notesInterval (mins) dB dB dB m1s
NSL1 1050-1150hrs 60 70.3 70.5 62.2 0.1-1.5 This location is along the boundary(On top of of the site along Turnpike road and
Bund) close to local residences. Traffic onthe Turnpike road is the main sourceof noise reaching up to 75dB. Siteactivity can be heard up to 55dB attimes at breaks in traffic. Truckdumping glass into storage areareached up to 90dB at 1118.
Day-time Measurements - Noise Sensitive Locations - Oxigen, Ballymount (09th June 2009)(Daytime background level)
Location Sampling Duration LAEQ LAlO LA90 Wind speed Sampling notesInterval (mins) dB dB dB m1s
NSLI 1204-1304hrs 60 65.0 67.9 55.9 0.1-1.5 This location is along the boundary(Roadside of of the site along Turnpike road and
Bund) close to local residences. The meterwas placed at the roadside of thebund to cancel out any noise fromthe site. Traffic on the Turnpike roadis the main source of noise reachingup to 75dB.
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Night-time Measurements - Noise Sensitive Locations - Oxigen, Ballymount (09th June 2009)
Location Sampling Duration LAEQ LAlO L A90 Wind speed Sampling notesInterval (mins) dB dB dB m/s
NSLI 1025-1040hrs 15 41.1 42.6 26.7 0.1-1.0 The area was quiet. Distant trafficcan be heard up to 55dB.
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4.2 Broadband Analysis:
-,---~---~--~----~---~----~---------~------.-,
70-
, , ,
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1
- - - - - - -!- -------: - -----!-------, -------,-------i------. .. ..I :I :
1~~b:2910:S4:43 10:S9:21 11:03:S9 11:08:37 11:13:15 11:17:53 11:22:31 11:27:09 11:31:47 11:36:25 11:41:03 11:45:41 11:S0:19Time
Fig.l: Broadband Analysis at NSLI (daytime).
. ,-.--------j---- ---1-. ,- ~ ~: - _ .. - - - -:- -- - - - - ... ~ - - - - - - - -: - - - - - ~
- ... .. -,_ ............. - "',. _ ... - ......... ; ... -
.,.
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-j ~ •I .
80.,
I
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sG-~"" --.:.
I,I
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1i%!-4:4-9-1-2-:081-:5-0-12~:1'-1'-3-:1-4-1-2:""117"-:3-9-12-:2....2-:0-3-1-2:-126-:2-7-1-2-:3"'Q-51-12-:3-;'S-:1-6-1~2~:391-:4-0-12-:4+4-:0-4-1-2:-148-:2-8-1-2-:S't'-2:-53-1-2:....S7-:1-7-1-3~:O""'1:....41
Time
Fig.2: Broadband Analysis at NSLI (daytime). (Roadside of Bund)
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60--,---~-
50-
1~o;5:46 10:26:48 10:2756 10:29:04 10:30:12 10:31 :21 10:3229 10:33:37 10:34:45 10:35:53 10:37:01 10:38:09 10:39:17 10:40:25Time
Fig.3: Broadband Analysis at NSLI (nighttime).
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4.3 1/3 Octave Frequency analysis:
80-r-~-~-~---
75 -,------- - -----~
70
65 --,-- -- -- - - -- -- - .-
60
55
50
45
40
35
30
25
20
15
10
..... • _L.. ...
-~
..J "" ~ ...
... .J l..
I--~---~ ... ,-
-I-25 Hz 40 Hz 63 Hz 100 Hz 160 Hz 250 Hz 400 Hz 630 Hz 1 kHz 1.6 kHz 2.5 kHz 4 kHz 6.3 kHz 10kHz 16 kHz
Fig.4: 1/3 Octave Frequency analysis at NSLI (daytime)
70;--~---.----r---r---,.----.---~---r----,-----.--~-~-~---.----~
65
60.. .
..... J,. _ oJ _'- .J_ oJ _1_ """_ L.. ...I I ' I I
I' I I
I I I I
55
50
45
40 .
35 .
30
25
20
15
10
· , ,_... -.j- _ + -4- - ...
• • I ,
• I I I· . ,· . .................. ""l- ............... -,-"''' - ......... r" ............ -,- .............. - ...· . .,. ." I" I.............. -.- -t ';' , ...I I • I· . ,· , ,
.., - -1- -I-'", ., .I ••
-, - - -,_ j-"" -.- ...
--------,------
-1-25 Hz 40 Hz 63 Hz 100 Hz 160 Hz 250 Hz 400 Hz 630 Hz 1 kHz 1.6 kHz 2.5 kHz 4 kHz 6.3 kHz 10kHz 16 kHz
Fig.5: 1/3 Octave Frequency analysis at NSLI (daytime). (Roadside of Bund)
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5.0 Interpretation of results
5.1 Noise levels;
The usual noise limits for such operations are as follows:
Daytime Limit
Night time Limit
LAeq < 55dB
LAeq < 45dB
5.1.1 Day-time levels:
As can be seen in section 4.1, LAeq levels at all noise sensitive locations are greater
than the day time limit of 55dB. The main noise source at this location is continuous
traffic from the Turnpike road. It can also be seen that the noise due to normal
operation of the development at the noise sensitive location does not exceed the
daytime background level by more than 1OdB.
5.1.2 Night-time levels:
Again from section 4.2, LAeq levels were less than the night time limit of 45dB.
6.0 Conclusions
• The noise contribution made by the Oxigen operation does not exceed the
daytime background limit by more than 10dB.
• The night time limit of 45dB is not being breeched by the Oxigen operation.
• There was no evidence of a tonal or impulsive component to the noise
attributable to the plant operation.
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Appendix 1
Site map showing noise sensitive locations
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Appendix 2
Photographs of Noise Monitoring equipment on-site
during monitoring
Noise equipment at NSLI facing as one looks away from operation and towards thenearby cottages
Noise equipment at NSLI as ones looks towards the operation
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Noise equipment at NSLI placed behind bund
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Contents
Section 2: Assessment of Predicted Noise Levels on the proposed treatment shed
1.0 Introduction
2.0 Impact on the surrounding environment (operational and construction phase)
3.0 Proposed noise mitigation measures
Noise Emission Control MeasuresSite Noise Emission Control ChecklistProjected Noise Monitoring locations
Conclusions and Recommendations of the Study
References
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Section 2: Assessment of Predicted Noise Levels on the ProposedTreatment Shed
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1.0 Introduction
At the request of Oxigen Environmental, BHP conducted a noise-monitoringprogramme at the operation at Ballymount.This section provides an assessment of predicted noise emissions during the course ofoperation of the proposed development, having regard to the time frame of operationsand scale of activity at the site. This section deals with the following:a) An examination of the impact of noise emissions on the surrounding environmentof the treatment facility when operational, especially on residential units in theimmediate vicinity of the site.b) Proposed measures to be employed to mitigate against noise emissions.
All responses made here have due consideration to the worst-case scenario beingpredicted. To that end the FHA Noise Model (Version 2.1) has been used to model thepredictive noise.
Environmental noise modelling describes the process of theoretically estimating noiselevels within a region of interest under a specific set of conditions.
The specific set of conditions for which the noise is being estimated will be a fixedrepresentation or 'snapshot' of a physical environment of interest. However, inpractice the physical environment will usually not be fixed, but will be characterisedby constantly varying conditions. These variations in real world conditions willsubsequently cause the actual sound field to vary in time and space. Thus it isimportant to recognise that the output of an environmental noise model will onlyrepresent an estimate for a 'snapshot' of the range of actual environmental noiselevels that could occur in time and space.
Recognising that modelling is a means of estimating noise for a specific set ofconditions, attention is now directed to defining what these conditions are. The keyconditions that a noise model relates to are:
• An approximation of the noise source, or sources, for which associatedenvironmental noise levels are of interest.
• An approximation of the physical environment through which noise willtransmit from the noise source(s) to the location or region of interest. Thisincludes the ground terrain, the built environment, and atmospheric conditions(e.g. wind, temperature, humidity)
• An approximation of the way in which sound will travel from the input noisesource(s) via the input physical environment, to the receiver location or regionof interest
Thus, producing an environmental noise model involves defining a series of noisesources to be investigated, describing acoustically significant features of theenvironment through which sound will propagate to the receiver, and then applying acalculation method that accounts for these descriptions to produce an estimated noiselevel at a location or region of interest.
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· To that end the FHA Noise model was chosen as it allows for muliple inputs, takesaccount of the terrain and uses a spherical progagation methodology. The model alsoallows for the prediction of noise levels on the receiver at selected distances with andwithout barriers of various heights.
These predicted noise levels were made using data gathered on the 9th of June 2009from the operation where noise measurements were conducted on the existing facilityfor the proposed extension to the facility.
2.0 Impact on the surrounding environment (operational phase)
The proposed development when operational will involve an increase in vehiculartraffic entering and exiting the site. All other processes are enclosed with a negligibleimpact on the nearest noise sensitive locations.
The worst-case scenario will involve activities close to the residentiallocations at N5 and N6. No increase in noise levels at the residential location close toN4 is envisaged due to the shielding nature of the rock face already in place.
The table illustrates the resulting level of noise emissions for what the worst-casescenario for the monitoring point as illustrated in section 1 of this report for afrequency of 25 truck movements between 8am and 6pm with a 2 meter earth barrier.
Scenario: Roadside location of existing bund with oncoming wind (2-5 m/s)-Nobarrier
Monitoring Location L AEQ (30m ins)
dB
NSL 68.5
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3.0 Proposed Noise Mitigation Measures
BHP Laboratories present here a noise reduction and management plan for theoperational lifetime of the proposed facility.
A noise management plan is an essential part of controlling noise emissions during theoperational lifetime of the proposed facility. Elements of this plan may beincorporated into any future environmental management system of the proposedfacility.
Noise Emission Control Measures
Oxigen Environmental are ensuring that all equipment installed in the facility isdesigned to the latest international best practice for noise abatement. Features of thisequipment are the control and management of noise emissions.The main potential sources of emissions from vehicles moving around the site andreversing sirens.
The table below illustrates the main transfer points and technology used to reduce anynoise emissions.
Source ControlVehicles moving around site. Maintained Internal Pavement
Speed Limit of 20 km/hrReversing Sirens White noise reversing sirens
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Presented here is a site noise control checklist for incorporation into the· environmental management system for the proposed facility. It may also be used
standalone as a tool for managing any noise emissions. It encompasses all aspects ofoperational site noise control under the following headings:
Operational Site MeasuresHauled MaterialsPaved Road Access/EgressMonitoring
Site Noise Emission Control Checklist
Sean Reilly Plant HireOperational Site Measures Yes No Comments
Areas to be protected are fenced or blocked offPhysical Noise Barriers are correctly placed andmaintainedSite Traffic is controlled and entry/exit pointscorrectVegetation retention and revegetation measures arebeing carried out as required
Hauled MaterialsLoads are kept within designated load limitsLoads are secure and trucks are secure beforemoving off.
Paved Road AccesslEgressSite access/exit is stabilised through a concrete orequivalent surface
MonitoringA noise monitoring programme is in place
This information is true and correct to the best of my knowledgeName of the person inspecting the siteSignatureDate of Site Inspection
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Projected Noise Monitoring locations
To ensure compliance with current noise guidelines or future imposed guidelines(which may be lower), BHP propose that Oxigen Environmental develop a suitableenvironmental noise emission monitoring programme at least 2 locations, all of whichrepresent noise sensitive locations within 400m from the centre of the proposed site
Monitoring Plan and Reasons:
Monitorin~ Location Reason for Monitorin~
NSLI This location will ensure that there is noenvironmental noise nuisance associated
with the increased traffic movements.NSL2 This location will ensure that there is no
environmental noise nuisance associatedwith the increased traffic movements.
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Conclusions and Recommendations of the Study
Using baseline and data gathered from the active site it is concluded that noise levelswill not exceed the daytime background level by more than 10 dB(A) in any 60minute period. The current bund is proving an effective barrier in shielding currentactivities form the residential areas and no not represent a nuisance value over currenttraffic impacts.
Recommendations
The following points are recommended with a view to reducing overall noise impactson the noise sensitive locations.
1: The internal pavement of the facility should be maintained to reduce vehicularnoise, especially banging from empty trucks.2: A speed limit of20 km/hr should apply for vehicles operating in the site.3:Screening Bunds close to the residences at the noise sensitive location should bemaintained and a planting programme introduced to further reduce potential noiseimpact.4: Periodic noise monitoring at the noise sensitive locations should be introduced toensure that all national guidelines in relation to noise ELV's are being complied with.5: A review of reversing sirens should take place with a view to their possiblereplacement with white sound technology.
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References
1: Environmental Quality Objectives (Noise in Quiet Areas) Synthesis Report, EPA,2000.2: Environmental Protection Agency NSW, 2002. Draft Noise Guide for LocalGovernment.3: EU, 2002. Directive 2002/49/EC of the European Parliament and of the Council ofJune 25 2002 relating to the assessment and management of environmental noise.Official Journal of the European Communities, L189/12-25, 18.7.204: ISO 9613, 1996(E). Attenuation of Sound during Propagation Outdoors. Part 1.Calculation of the Absorption of Sound by the Atmosphere. Part 2. General Method ofCalculation.5:Environment Agency UK, 2001. Technical Guidance Note IPPC H3. DraftHorizontal Guidance for Noise Part 2, Noise Assessment and Control.6: Environmental Management Guidelines: Environmental; Management in theExtractive Industry (non-scheduled minerals), EPA, 2006.7: Guide to Predictive Modelling for Environmental Noise assessment published bythe National Physics Laboratory, UK, 2009.
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