CONSTRUCTION NOISE MANAGEMENT PLAN WARRENPOINT HARBOUR
Transcript of CONSTRUCTION NOISE MANAGEMENT PLAN WARRENPOINT HARBOUR
CONSTRUCTION NOISE MANAGEMENT PLAN
WARRENPOINT HARBOUR
Rp001 2018195 (Warrenpoint Harbour)
7 June 2019
2 Rp001 2018195 (Warrenpoint Harbour)
PROJECT: WARRENPOINT HARBOUR
PREPARED FOR: WARRENPOINT HARBOUR
THE DOCKS
WARRENPOINT
CO. DOWN
BT34 3JR
ATTENTION: KIERAN GRANT
REPORT NO.: RP001 2018195
Disclaimer
This report is provided for the stated purposes and for the sole use of the named Client. Irwin Carr Ltd
accepts responsibility to the Client alone that the report has been prepared with the skill, care and
diligence of a competent engineer, but accepts no responsibility whatsoever to any parties other than the
Client. Any such parties rely upon the report at their own risk.
Copyright
The concepts and information contained in this document are the property of Irwin Carr
Ltd. Use or copying of this document in whole or in part without the written permission of Irwin Carr Ltd
constitutes an infringement of copyright. Information shall not be assigned to a third party without prior
consent.
Document Control
Status: Rev: Comments Date: Author: Reviewer:
Final 1.0 7 June 2019 Shane Carr Chris Jordan
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Table of Contents
1.0 INTRODUCTION .................................................................................................................... 4
2.0 DEVELOPMENT DESCRIPTION .............................................................................................. 4
3.0 DETAILS OF NOISE GENERATING ACTIVITIES ........................................................................ 5
4.0 OUTLINE OF PHASING OF CONSTRUCTION ACTIVITIES ......................................................... 5
5.0 HOURS OF OPERATION ........................................................................................................ 5
6.0 BS5228:2014 ........................................................................................................................ 6 6.1 The ABC Method .......................................................................................................................... 6 6.2 Environmental Noise Survey ........................................................................................................ 7 6.3 Noise Levels ................................................................................................................................. 7
7.0 OBSERVATIONS .................................................................................................................... 8
8.0 NOISE MODELLING ............................................................................................................... 8 8.1 SoundPLAN Modelling ................................................................................................................. 8
8.1.1 Model Inputs ......................................................................................................................... 9 8.1.2 Receptor Locations ................................................................................................................ 9 8.1.3 Predicted Noise Levels ........................................................................................................... 9
9.0 MITIGATION ......................................................................................................................... 9
10.0 COMMUNITY RELATIONS ............................................................................................. 10
11.0 CONCLUSION ............................................................................................................... 11
APPENDIX A SITE LOCATION
APPENDIX B NOISE MAP
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1.0 INTRODUCTION
Irwin Carr Consulting Ltd have been commissioned by Warrenpoint Harbour to produce a
construction noise management plan associated with proposed work on the harbour land.
It is understood that this noise management plan will be relied upon by the Nippon Gases UK
Marine Licence Application for construction of two unloading pipes & a power supply over the
water to the jetty adjacent to the Ro-Ro dock plus further west a flap valve in the sea wall on new
surface drainage from the adjacent storage tank installation.
The purpose of this assessment is to assess the potential impact of noise at the boundary of the
site but assessing the impact from existing construction ongoing within the harbour property.
2.0 DEVELOPMENT DESCRIPT ION
Planning permission associated with the planning application number LA07/2015/0056/F was
granted on 21 October 2015 for:
Construction of pipelines (2no) and 7 horizontal storage tanks for the supply by ship of
liquid Carbon Dioxide, with a total storage capacity of 3,200 tonnes and venting by
silencer at jetty. The storage tanks will have plant access steelwork and a new hard
standing area, and new access road. A loading bay with weighbridge to include
containerised weighbridge station for 2 road tankers. A containerised Motor Control
Centre will supply power and a containerised refrigeration centre of 20m2 to keep Carbon
dioxide at normal operating temperature. A containerised Quality Assurance lab of 20m2.
There were a number of planning condition requiring a Construction Method Statement (CMS) to
be submitted to the Planning Authority for agreement with the NIEA prior to the commencement of
construction.
It is the purpose of this additional noise assessment to address these specific requirements of the
planning consent in advance of the construction works beginning onsite.
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3.0 DETAILS OF NOISE GENERATING ACTIV IT IES
Noise generating construction activities at the permitted development site will employ typical
construction methods i.e. site clearance, earthworks/remediation, foundations, construction of
buildings, roads and landscaping. Typical construction noise levels are presented within Table 1
below.
Table 1: Typical Noise Levels from Construction Works (Ref: BS 5228)
Activity Plant LAeq at 10m
Site clearance/excavation
Earthworks
Lorries (drive by)
Dozers
HGV and tippers
70 dB
87 dB
84 dB
Foundations
Concrete Pour
Place and vibrate
Concrete Cycle Cement
Mixers
up to 80 dB
up to 86 dB
80 dB
74 dB
Metal Frame Large crane operations
Place and vibrate
86 dB
80 dB
Grinding Angle Grinder 80 dB
Generators Diesel Generators 65 dB
Road works/landscaping Surfacing/rolling 76 - 86 dB
4.0 OUTLINE OF PHASING O F CONSTRUCTION ACTIV IT IES
The method of construction will be site clearance, earthworks and remediation, foundations,
construction of buildings, roads and landscaping.
5.0 HOURS OF OPERATION
Where construction activity takes place for a development in the vicinity of residential properties, it
is standard practice that the activities would operate between the hours of 07:00 and 18:00 on
Monday to Fridays, between 07:00 and 13:00 on Saturdays and there will be no activity on
Sundays or Bank Holidays.
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6.0 BS5228:2014
The Code of practice for noise and vibration control on construction and open sites (BS 5228-
1:2014) provides a number of methodologies for assessing the significance of construction noise at
residential receptors. These methodologies “would generally apply to projects of a significant size”,
with a more generalised consideration of construction noise impact recommended for smaller
projects.
The standard presents criteria based on fixed limits and noise change criteria. Given the scale of
the project under assessment, it is appropriate to adopt the noise change criteria using the “ABC
Method”.
6.1 THE ABC METHOD
The existing ambient noise level at a residential property is rounded to the nearest 5 dB and this
number is used to determine the threshold value for each of three time periods (if applicable):
Night-time, Evenings and Weekends, and Daytime. The threshold values are shown in Table 1
below.
The total ambient noise level (including construction noise) is then compared with the threshold
values to determine if a significant effect is likely.
A significant effect is deemed to occur if the total LAeq noise level, including construction noise,
exceeds the threshold level for the Category appropriate to the ambient noise level.
Table 2: BS5228:2014 Construction Noise Assessment (ABC Method)
Assessment category and threshold value period
(LAeq)
Threshold values, in decibels (dB)
Category AA) Category BB) Category CC)
Night-time (23:00 – 07:00) 45 50 55
Evenings and weekends D) 55 60 65
Daytime (07:00 – 19:00) and Saturdays (07:00 –
13:00) 65 70 75
A) Category A: Threshold values to use when ambient noise levels (when rounded to the nearest 5 dB)
are less than these values.
B) Category B: Threshold values to use when ambient noise levels (when rounded to the nearest 5 dB)
are the same as category A values.
C) Category C: Threshold values to use when ambient noise levels rounded to the nearest 5 dB) are
higher than category A values.
D) 19:00 – 23:00 weekdays, 13:00 – 23:00 Saturdays and 07:00 – 23:00 Sundays.
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6.2 ENVIRONMENTAL NOISE SURVEY
There are ongoing construction works to build a lorry parking area on the north western side of the
Warrenpoint Port, towards the Narrow Water round about. The ground works, angle grinding and
concrete pouring associated with these construction works would be considered to be similar to
what is propose din association with the works required in this application.
Noise levels were measured at the edge of the site of the construction works. The location is
presented in Appendix A and Table 2 and measured over 7 days from 8 to 14 May 2019. The
survey was undertaken by Christy Carr using the following equipment:
• 01 dB Duo Sound Level Meter
• 01 dB CAL21 Acoustic Calibrator
Table 3: Noise Monitoring Location
Location (Irish Co-ordinate System)
Noise Monitoring Location 312985, 318887
The acoustic parameters measured included LAeq and LA90.
Instrumentation was check calibrated before and after each survey period with no deviations
noted. Weather conditions were mixed throughout the measurement period but did not appear to
affect the measurements due to the high ambient sound level generated by passing traffic along
the busy Newry Road (A2).
6.3 NOISE LEVELS
Figure 1 presents the results of the long-term external noise level measurements.
Figure 1: Acoustic survey time history
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7.0 OBSERVATIONS
As per Figure 1, noise levels follow the typical diurnal pattern of higher noise levels during the day than
night.
To permit comparison with BS5233 Guidelines the relevant LAeq,12hr – Daytime values are presented in
Table 4. As per Table 4, category A values apply to the permitted development.
Table 4: LAeq,16hr and LAeq,8hr values
Day Date LAeq,14hr, dB
Wednesday 8 May 2019 56.5
Thursday 9 May 2019 53.0
Friday 10 May 2019 50.1
Saturday 11 May 2019 52.7
Sunday 12 May 2019 46.4
Monday 13 May 2019 48.5
Tuesday 14 May 2019 49.6
It can be seen that the measured noise level from similar construction work does not exceed the
permitted noise level at the site boundary.
8.0 NOISE MODELLING
Noise from the proposed development, or the specific noise level, has been predicted using
SoundPLAN acoustic modelling software.
8.1 SOUNDPLAN MODELL ING
For the purposes of this assessment, computer modelling has been undertaken to accurately
predict noise emissions at the nearest residential properties due to the proposed alterations.
The model was implemented in SoundPLAN version 8.1, which is produced by Braunstein & Berndt
GmbH. The SoundPLAN implementation of ISO9613 has been tested in-house by SoundPLAN
developers to ensure calculated results are within 0.2dB of the standard
The model is integrated, allowing noise from all sources, with prediction methodologies to be
undertaken simultaneously. The noise model can also takes into consideration detailed
• Topographical effects
• Atmospheric absorption
• Ground absorption
• Screening effects
• Reflections
• Focussing effects and
• Meteorological conditions
The model for the construction of the proposed facility considers a worst-case scenario when
works are being carried out on both the pipeline and the tanks simultaneously.
The screening effects of the larger buildings along the A2 Newry Road has not been taken into
account in the model. The ground absorption was set to ‘0’ in areas of hard standing, i.e. harbour,
roads, over water and in all residential areas. Ground absorption was set to ‘1’ in all other areas,
i.e. soft ground.
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8.1.1 Model Inputs
The main noise sources associated with the development are:
• Grinding and welding at location of pipeline (Sound Power Level 98dB(A))
• Excavation of work at location of tanks (Sound Power Level 105dB(A))
8.1.2 Receptor Locations
There are two specific areas of concern, both ecologically sensitive sites and residential receptors.
Details of the receptors included in the noise modelling are provided in Table 5 below and the
receptor locations can be seen in Appendix A.
It is understood that the are of greatest ecological concern is between the end of the Harbour area
and the Narrow Water Castle.
Table 5: Receptor Locations
Location Irish Grid Reference
E1 312947, 319051
E2 312906, 319015
R1 (Woodlands) 313549, 319074
R2 (Lower Dromore Road) 313860, 318518
8.1.3 Predicted Noise Levels
The predicted daytime construction noise levels at each of the receivers is shown in Table 6 below.
Table 6: Predicted specific noise level due to all operational sources
Receptor Location Daytime predicted level dB LAeq
E1 49.2
E2 49.9
R1 (Woodlands) 36.5
R2 (Lower Dromore Road) 35.6
It can be seen that the predicted noise level at the sensitive areas of the ASSI in terms of noise
impact will be below 50dB. This is a similar noise level to what has been measured at the
boundary of the site during when similar construction works were being carried out.
In addition the noise map in Appendix B shows the noise levels in the closest part of the ASSI to be
below the 70dB threshold where it would be considered to have a minimal impact.
In addition the noise level at the nearest residential locations will be significantly lower than the
criteria set out in the BS5228 guidance.
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9.0 MITIGATION
There are a number of additional mitigation measures proposed to be incorporated into the works
to minimise the noise impact. Noise impact as a result of the construction phase of the proposed
development may be perceptible at nearby properties, but this will be short term and temporary in
duration.
A number of appropriate mitigation measures are recommended to ensure the BS 5228 target
limits are not exceeded:
• Training and Supervision
Operatives will be trained to employ appropriate techniques to keep site noise to a minimum and
will be effectively supervised to ensure that best working practice in respect of noise reduction is
followed. Special attention will be given to the use and maintenance of sound-reduction
equipment fitted to power tools and machines.
• Choice and Operation of Plant
o Position of plant as far as possible from nearby residential properties and utilising
barriers such as screening, stock piles etc.
o Ensuring plant is well maintained especially lubrication of bearings, sharpening of
cutting edges, integrity of silencers and where possible, new machinery tested under
stricter EU Guidelines.
o Audible reversing warning systems on dump trucks should be of a type which, whilst
ensuring that they give proper warning, have a minimum noise impact on premises
outside the site.
o Avoid unnecessary revving of engines and switch off equipment when not required.
o Keep internal haul routes well maintained.
o Use rubber linings in, for example, chutes and dumpers to reduce impact noise.
o Minimise drop height of materials.
o Silenced generator and low noise grinding equipment will be used on the site to
minimise the noise at source.
• Working Methods
Where reasonably practicable, quiet working methods should be employed.
• Screening
Use of screening where possible such as, dense site perimeter boarding, stock piles etc as well as
specific hoarding around the site to minimise noise
• Limit of Plant On-Time
At locations where particularly noisy operations are near occupied properties, machine operation
time should be reduced as much as possible.
10.0 COMMUNITY RELATIONS
Good relations with people living and working in the vicinity of site operations are of paramount
importance. Early establishment and maintenance of these relations through the carrying out of
site operations will go some way towards allaying people’s fears.
It is suggested that good relations can be developed by keeping people informed of progress and
by treating complaints fairly and expeditiously.
To ensure the site is managed to a certain standard a competent and responsible person needs to
manage the daily operations of the site. This person would be responsible for matters relating to
noise and vibration and will help establish and maintain good communication between the
contractor/developer, Local Authority and residents.
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11.0 CONCLUSION
Irwin Carr Consulting Ltd were commissioned by Warrenpoint Harbour to produce a construction noise
management plan (CNMP) to enable the discharge of condition 2 of planning permission
LA07/2015/0056/F.
The CNMP details the hours of operation, contact details of the response person, the phasing of
construction activities and mitigation measurements that will ensure that Category A construction
noise limits as defined under BS5228:2014 are achieved at neighbouring residential dwellings.
In addition the noise at the site boundary will not cause an significant impact to the sensitive areas of
the ASSI.
For the reasons outlined within this report, Irwin Carr Consulting is of the opinion that noise generated
by the construction of the permitted development should not adversely impact neighbouring properties.
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APPENDIX A: SITE LOCATION
**Note- The above diagram is not to scale and is for illustrative purposes only
E1
Noise
Measurement
Location
E2
R1
R2
Existing
Construction Site
C:\Users\Shane Carr\Desktop\Modelling\Warrenpoint Harbour\2018195\Wpt Harbour.sgs
Customer:Warrenpoint HarbourProject: Warrenpoint HarbourProject-No. 2018195
Map
1
Warrenpoint Harbour
Normal construction at the site of the ship berth and tanks
Levels Ldin dB(A)
= 35= 40= 45= 50= 55= 60= 65= 70= 75
Signs and symbolsPoint receiver
Industrial building
Noise calculation area
Facade as source
Roof as source
Geometry bitmap
Punktquelle
Bodeneffekte
Length scale 1:38960 30 60 120 180 240
m
313000
313000
313250
313250
313500
313500
313750
313750
318250
318250
318500
318500
318750
318750
319000
319000