Post on 09-Sep-2015
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SCAL Construction Safety Seminar on Total WSH and the Environment
Construction Noise Management
Geraldine Poh, Engineer, Pollution Control Department, NEA
25 September 2014
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To share with participants:
1. Impact of Construction Noise in Singapore
2. NEAs Construction Noise Regulations
3. Noise Management Plan (NMP)4. Quieter Construction Fund (QCF)
Objectives
Impact increasingly felt due to: more construction developments located near residences and
other noise sensitive premises. rising public expectations for a quieter living environment
1 Impact of Construction Noise in Singapore
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2008 2009 2010 2011 2012 2013
No
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Year
Yearly No. of Construction Noise Complaints
1 Impact of Construction Noise in Singapore~ 20,000
02000
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10000
12000
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2008 2009 2010 2011 2012 2013
No
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f co
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Year
Yearly No. of Construction Noise Complaints
1 Impact of Construction Noise in Singapore
~ 16,000
No-Work Rule
1 Impact of Construction Noise in Singapore
0 5 10 15 20 25 30 35 40
Industrial
Roadworks
MRT/LRT Station
School
Others
Commercial
HDB Housing
Landed Property
Condominium
Approximate Percentage of Complaints on Different Type of Sites
Others drainage works, hospitals, recreational works, car park, cable works etc
1 Impact of Construction Noise in Singapore
7am - 7pm (Mon - Fri)
19%7am - 7pm
(Sat)8%
7am - 7pm (Sun/PH)
15%7pm -10pm (Mon - Fri)
27%
7pm - 10pm (Sat)3%
7pm - 10pm (Sun/PH)
1%
10pm -7am (Mon - Fri)
21%
10pm - 7am (Sat)3%
10pm - 7am (Sun/PH)
3%
Breakdown of 2013 Feedback by Day and Time
that around 12 midnight, works like ground drilling and and huge tiles being thrown down from the 6th floor is still being carried out, causing great noise pollution...
that around 12 midnight, works like ground drilling and and huge tiles being thrown down from the 6th floor is still being carried out, causing great noise pollution...
the sound of welding and shifting of steel rods and material
continues at night, sometimes until 4.00am. This has led to sleepless night for the family and as a result,
health problems has arisen
the sound of welding and shifting of steel rods and material
continues at night, sometimes until 4.00am. This has led to sleepless night for the family and as a result,
health problems has arisen
1 Impact of Construction Noise in Singapore its 4.26pm on Saturday and I have to say Im finding it very difficult with all the noise from the construction site along... We had to go out instead of resting at home to escape the noise how come the construction site is allowed to work in residential area during weekends?
its 4.26pm on Saturday and I have to say Im finding it very difficult with all the noise from the construction site along... We had to go out instead of resting at home to escape the noise how come the construction site is allowed to work in residential area during weekends?
2 Construction Noise Regulations
Permissible Noise LimitsNo-Work Rule
Control of Construction Noise Environmental Protection and Management Act (EPMA) EPM (Control of Noise at Construction Sites) Regulations
2 Construction Noise RegulationsNo-Work Rule
Construction project dates Construction work not allowed from:Sites commencing work on or after 1 September 2010
No work allowed from 10.00pm on Sat/eve of PH to 10.00am on Sun/PH.
Sites commencing work on or after 1 September 2011
No work allowed from 10.00pm on Sat/eve of PH to 7.00am on the following Mon/day after the PH.
Applicable for construction sites within 150m away from residential building, hospital and home for the aged sick
2 Construction Noise RegulationsTypes of affected buildings 7am - 7pm 7pm - 10pm 10pm - 7am
(a) Hospital, schools, institutions of higher learning, homes for aged sick, etc
60 dBA(Leq 12 hr)
50 dBA(Leq 12 hr)
75 dBA(Leq 5 min)
55 dBA(Leq 5 min)
(b) Residential buildings located less than 150m from the construction site
75 dBA(Leq 12 hr)
65 dBA(Leq 1 hr)
55 dBA(Leq 1 hr)
90 dBA(Leq 5 min)
70 dBA(Leq 5 min)
55 dBA(Leq 5 min)
(c) Buildings other than those in (a) and (b) above
75 dBA (Leq 12 hr)
65 dBA (Leq 12 hr)
90 dBA(Leq 5 min)
70 dBA(Leq 5 min)
Permissible Noise Limits (Mon Sat)
2 Construction Noise RegulationsPermissible Noise Limits (Sun & PH)
Types of affected buildings 7am - 7pm 7pm - 10pm 10pm - 7am
(a) Hospital, schools, institutions of higher learning, homes for aged sick, etc
60 dBA(Leq 12 hr)
50 dBA(Leq 12 hr)
75 dBA(Leq 5 min)
55 dBA (Leq 5 min)
(b) Residential buildings located less than 150m from the construction site
75 dBA(Leq 12 hr) 55 dBA
(Leq 5 min)75 dBA(Leq 5 min)
(c) Buildings other than those in (a) and (b) above
75 dBA (Leq 12 hr)
65 dBA(Leq 12 hr)
90 dBA (Leq 5 min)
70 dBA(Leq 5 min)
3 Noise Management Plan Since 2012, NEA has been requiring builders of construction / demolition
projects located within 150m of residential and sensitive premises, and above $50mil in project value, to submit their NMPs and attend meetings with NEA noise control officers
NEA officers will go through their NMP to improve their noise monitoring programme, check for proper locations of noise monitoring system, siting of noisy equipment, public engagement programme and provide advice on noise mitigation measures.
Advise contractors to take extra steps to reduce noise, address residents issue with noise etc.
3 Noise Management PlanNMP
Scope Develop site engineering and operational measures to manage and mitigate noise based on known equipment, working schedules, site conditions etc for implementation
Carried out by Builder
Used by Project Manager, general manager, ECO, PRO, sub-contractors, workers
Contents Noise monitoring Background noise study Working schedule Noise mitigation measures Site layout Protocol to manage public feedback Public engagement strategy
3 Noise Management PlanIdentify nearby noise sensitive
premises
Identify construction activity having
noise impact on the sensitive premises
Estimate noise emission levels
received by sensitive premises at
different phases of work
Noise emission levels exceed
permissible noise limits?
Reduce noise as far as practically
possible to minimise noise nuisance
During operations - Close
monitoring of noise levels &
conduct regular public outreach
Yes No
Start
Plan for noise mitigating
measures
3 Noise Management Plan Noise ControlControl of Noise Source Use of newer machines, proper maintenance of machines to minimise noise
and setting up enclosures around noisy machines etc.
Proper Scheduling Factoring in no work on Sun & PH. Restrict the duration of noisy activities (e.g. piling) in order to control daytime
and evening time average noise levels within permissible limits.
Location of Noisy Equipment Stationary noise sources e.g. generators should be sited furthest away from
noise sensitive premises or shielded.
Noise Barriers Removal of a direct line-of-sight between the noise source and sensitive
premises. Site office and storage silos as noise shields.
3 Noise Management Plan Noise Control
Erect acoustic noise barriers where residential units are very close to noise source
Rows of silos placed before receivers aid in mitigating construction noise.
Noise Barriers and Shields
3 Noise Management Plan Noise Control
Use quieter alternatives such as a silent piler for installing sheet piles.
Traditional method of using vibro hammer generates loud noise and ground vibration.
Selection of Equipment
3 Noise Management Plan Noise Control
Use sound-reduced machinery.
Control of Noise at Source
For machines that are not yetsound-reduced, install noisepanels at noise emission outlets.
3 Noise Management Plan Noise Control
Openings of partial enclosuresshould face away from residentsand if theres no roof, it shouldntbe placed below any tallresidential buildings.
Housing of small motor units.
Using Enclosures
3 Noise Management Plan Noise Control
Using full enclosure forhousing of generator set.
Using Enclosures
Portable noise barriers can beused at face of operations fornoisy activities.
3 Noise Management Plan Noise Control
Remind machine operators not to exert more power than necessary during operations.
Educate workers to lay rebar down properly instead of letting them go from a standing position.
Behavioral Improvement
3 Noise Management Plan Public Relations Establish and maintain good relationship with nearby residents to seek their
understanding on the inevitable dis-amenities from construction.
The contractor should appoint a public relations point of contact with the public.
Regular updates to nearby residents of work schedule and manage complaints fairly and promptly.
The contractor should also inform the public of the mitigating measures implemented to assure them that noise impact has been properly controlled.
Public relations should be carried out even if noise levels do not exceed permissible limits as people may still be annoyed by noise nuisance.
3 Noise Management Plan Noise Monitoring Construction sites are required by Notice to install noise meters to monitor
the noise continuously.
Sound level meters shall be installed according to requirements in NEAs Notice:
o Class 1 and in compliance with IEC 61672 standardo In direct line-of-sight to construction activitieso Operating at all times
Contractors may submit background noise study for review of noise limits.
3 Noise Management Plan Noise Monitoring
Above site hoarding if no buildings nearby
On rooftop of nearest sensitive building
3 Real-time Noise Monitoring System
Noise readings:a) Project Managerb) ECOc) NEA
wireless communication
Class 1 Sound Level Meter
Web server
Solar panel
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SMS alerts toContractors
3 Predictive Real-time Noise Monitoring System
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Awareness Capability
Computes and displays current Leq 1hr and 12hr noise levels.
Sends notifications and alerts promptly for contractors to stop or reduce noisy works before violation.
3 Predictive Real-time Noise Monitoring SystemReactive Capability
Dose percentage indicates the proximity of approaching the limits
When dose percentage reaches 100%, it means the Leq1hr and 12hr limit has already exceeded
Displays the maximum allowable Leq 5min to serve as a guide to contractors to stay within the allowable Leq1hr and 12hr limit
Dose % Max Leq 5min79% 71.0
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3 Predictive Monitoring System (Example for Leq12hr)Day Leq 5min = 90 dBA; Leq 12hr = 75dBA
Time Leq1hr Leq12hr Predicted Leq12hr
7:00:00 AM 65
-
65(within limit)
8:00:00 AM -
9:00:00 AM -
10:00:00 AM -
11:00:00 AM -12:00:00 PM -1:00:00 PM -
2:00:00 PM -
3:00:00 PM -
4:00:00 PM -
5:00:00 PM -
6:00:00 PM -
7:00:00 PM -
Contractor starts carrying out piling activities at 8am.
Max Leq 5min Dose %
75 0.8
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3 Predictive Monitoring System (Example for Leq12hr)Day Leq 5min = 90 dBA; Leq 12hr = 75dBA
Time Leq1hr Leq12hr Predicted Leq12hr
7:00:00 AM 65
-
76.3(exceeded limit)
8:00:00 AM 77
9:00:00 AM 77
10:00:00 AM 77
11:00:00 AM 7712:00:00 PM 771:00:00 PM -
2:00:00 PM -
3:00:00 PM -
4:00:00 PM -
5:00:00 PM -
6:00:00 PM -
7:00:00 PM -
Max Leq 5min Dose %
73 68%
Contractor receives a routine
notification at 12pm, indicating dose % of 68%.
Contractor carries on piling.
Dear User,The noise level dose percentage at 12pm, [date], is 68%.Please monitor the sound level emitted from the site closely.
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3 Predictive Monitoring System (Example for Leq12hr)Day Leq 5min = 90 dBA; Leq 12hr = 75dBA
Time Leq1hr Leq12hr Predicted Leq12hr
7:00:00 AM 65
-
76.5(exceeded limit)
8:00:00 AM 77
9:00:00 AM 77
10:00:00 AM 77
11:00:00 AM 7712:00:00 PM 771:00:00 PM 77
2:00:00 PM 77
3:00:00 PM -
4:00:00 PM -
5:00:00 PM -
6:00:00 PM -
7:00:00 PM
Max Leq 5min Dose %
68 95%
Contractor receives alert at 2pm, indicating dose % of 95%.
System indicates that noise level
needs to be below 68dBA to stay
within Leq 12hr limit.
Contractor stops piling activities to comply with limits.
Dear User,This message is to alert you that your noise level dose percentage has reached 95%.You are at risk of exceeding the Leq 12hr limit.Please stop all noisy activities to stay within the limit.
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3 Predictive Monitoring System (Example for Leq12hr)Day Leq 5min = 90 dBA; Leq 12hr = 75dBA
Time Leq1hr Leq12hr Predicted Leq12hr
7:00:00 AM 65
74.9(within limit)
74.9
8:00:00 AM 77
9:00:00 AM 77
10:00:00 AM 77
11:00:00 AM 7712:00:00 PM 771:00:00 PM 77
2:00:00 PM 77
3:00:00 PM 68
4:00:00 PM 68
5:00:00 PM 68
6:00:00 PM 68
7:00:00 PM 68
Max Leq 5min Dose %
68 99.4%
Contractor manages to
comply with Leq 12hr limits after
keeping within the maximum
allowable Leq 5min.
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Predictive Real-time Noise Monitoring System3
3 Predictive Real-time Noise Monitoring System
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Benefits
Enable contractors to re-schedule their work if necessary to comply with the permissible limits (Leq 1hr or Leq 12hr limits) and effectively reducing violations.
On receiving complaints, Noise Unit can assess noise levels at construction site and direct contractors to act accordingly.
Lower noise levels, quieter environment and less complaints.
4 Quieter Construction Fund
Objectives Achieve a quieter living environment. Build up local expertise in the implementation of quieter
construction. Pave the way towards higher standards in managing noise.
$10 million co-funding scheme to defray cost of implementing quieter construction machine, noise control equipment and innovative solutions at project sites close to noise sensitive premises.
Application period
1 April 2014 31 Mar 2016.
Target Recipients
Construction firms operating on existing or proposed construction/ demolition sites within 150m from noise sensitive premises.
4 Quieter Construction Fundi. Applicant must be a Singapore-registered company, who is,
a) Operating on; orb) Supplying construction equipment for
an existing or proposed construction site located less than 150m from any hospital, home for the aged sick, residential building or other noise sensitive premises.
Eligibility Criteria
ii. Purchase or leasing of equipment from related companies is not supported.
iii. Public sector projects in which the equipment is already required under contract are not supported.
iv. Equipment must not be procured before submission of application
4 Quieter Construction Fund
Jack-in pilingsilent sheet piling
Concrete crusher machine
Examples of Supported Quieter Construction Equipment (not exhaustive)
Performance Requirements
Tested or certified to be at least 5 dB(A) quieter than 2 other equipment meant for the same work commonly used in Singapore.
Engine noise reduced excavators
4 Quieter Construction FundExampes of Supported Noise Barrier and Enclosure (not exhaustive)
Performance Requirements Comprises acoustic absorbing material Tested in an accredited laboratory for
sound transmission loss Designed and erected according to
international standards for effective noise attenuation
For perimeter noise barrier: Achieve a minimum noise reduction of 10 dB(A) for specific construction work as compared to without the noise barrier, measured at the same receiver point within the acoustic shadow of the noise barrier.
For noise enclosure: Achieve a minimum noise reduction of 15 dB(A) for specific construction work, as compared to without the noise barrier, measured at the same distance from the noise source.
Perimeter noise barrier
Noise curtain
Plant noise enclosure
Machine noise enclosure
Rotary head enclosure
4 Quieter Construction FundExamples of Supported Innovative Solutions (not exhaustive)
Performance Requirements
Able to achieve a minimum noise reduction of 5 dB(A)for specific construction work at each noise source where the Innovative Solution is implemented.
Crack inducer
Modified Auger bucket
4 Quieter Construction FundForm of Assistance
The minimum total investment amount per application must be $5,000 or above.
For applicant who is operating on a construction sites, the total funding disbursed to each project site is capped at $100,000, or 5% of the project contract value, whichever is lower.
For applicant who is a supplier of construction equipment, the total funding disbursed to the applicant is capped at $100,000, over 2 years.
4 Quieter Construction FundEquipment Category Purchase / Lease Cost Funding %Quieter Construction Equipment (purchase)
$100,000 per equipment Up to 50%, capped at $20,000 per equipment
> $100,000 per equipment Up to 20%, capped at $50,000 per equipment
Quieter Construction Equipment (leasing)
$30,000 per equipment Up to 50%, capped at $6,000 per equipment
> $30,000 per equipment Up to 20%, capped at $20,000 per equipment
Purchase & setting up of Noise Control Equipment
$5,000 per Project Site Up to 50% per Project Site
Purchase & setting up of Innovative Solution
$5,000 per Project Site Up to 50% per Project Site
Form of Assistance
4 Supported equipment should meet performance
requirements after implemented on site for successful disbursement
For noise barriers: applicants are required to submit an independent site measurement report conducted according to ISO 10847 (cost of report is supported)
For quieter equipment and innovative solutions: applicant are required to facilitate NEA officers for site inspection
Performance Testing
Measurement for quieter excavators and self-compacting concrete
Measurement for perimeter noise barrier
4 Quieter Construction FundFor further details
QCF guidelines, application forms available on NEAs website: http://app2.nea.gov.sg/grants-awards/quieter-construction-fund/quieter-construction-fund
4 Quieter Construction FundFor further details
QCF Fund Secretariat Contact: o 6731 9668 (tel)o nea_qcf@nea.gov.sg (email)
Applicants are encouraged to contact the Fund Secretariat to determine the eligibility of their proposed equipment before submitting an application.
4 Code of Practice for Noise Control on Construction and Demolition
Sites (CP49) Technical guidelines containing the following topics in construction
noise management: Principles of sound Rating of sound Estimation of construction noise levels Noise monitoring systems Background noise calculations Noise control practices Planning for noise in Design / Tender / Construction stage
a) CP 49 can be purchased from SPRING Singapore Standards eshop (www.singaporestandardseshop.sg)
b) Currently CP49 is undergoing a revision to incorporate the latest information and targeted for release in end-2014.
Revised Code of Practice on Construction Noise
Safeguard Nurture Cherish
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