construction noise
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ENVIRONMENTAL PROTECTION AND
MANAGEMENT
(CONTROL OF NOISE AT CONSTRUCTION
SITES) REGULATIONS
2. Construction site any premises
(a) erection, construction, alteration, repair
or maintenance of buildings, structures orroads;
(b) the breaking up, opening or boring underany road or adjacent land in connection with
the construction, inspection, maintenance orremoval of works;
(c) piling, demolition or dredging works; or
(d) any other work of engineering
construction.
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Permissible noise level
After 1st Oct 2007, maximum permissible noiselevels set out in second schedule.
Noise measurement taken at one meter awayfrom the outside of any affected building.
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MAXIMUM PERMISSIBLE NOISE LEVELS
Types of affected buildings Maximum permissible noise
level for construction sites
(reckoned as equivalent over
12 hours in dB(A))
7 am to 7 pm 7 pm to 7 am
(a) Hospitals, schools 60 50
(b) Residential buildings located 75 -
less than 150 m from construction
Site
(c) Buildings (other than above) 75 65
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Maximum permissible levels Leq, 5 min
Types of buildings Max permissible levels Leq, 5 min
7 am to 7 pm 7 pm to 10 pm 10 pm to 7 am
(a) Hospitals, schools 75 55 55
(b) Residential buildings
less than 150 m(i) On Mondays to Saturdays 90 70 55
(ii) On Sundays and PH 75 55 55
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PROHIBITED PERIODS
1. From 190 pm every Sat to 7 am on the following Monday.
2. From 10 pm on eve of PH to 7 am on the day following PH
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Construction Site
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Construction Site
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CP 49 : 1998 CODE OF PRACTICE FOR
NOISE CONTROL ON CONSTRUCTIONAND DEMOLITION SITES
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Free Field
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Reflection from wall
3 dB(A) higher
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Reflection from each wall
6 dB(A) higher
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Source outside line of sight
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B.5.2 Allowance for reflection of sound at a
building faade
When the sound level at a building faade is to
be estimated, an additional of 3 dB(A) should
be made to the value calculated for an open
space to allow for the effect of reflection ofsound from the faade. In situation where
multiple reflections occur immediately outside
a building due to several surrounding walls,
sound levels may be increased even further.
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C.2 Control of noise from construction sites
The measurement of ambient noise level must becarried out either prior to the start of the project, or if
the project has already commenced, during periods
when there is no noise producing activity being carried
out on the site in question.
The ambient noise levels should be measured over a
chosen period of time, say 12 h (from 0700 hrs to 1900
hrs or from 1900 hrs to 0700 hrs). The ambient noise
levels so obtained will give an indication of the current
noise status of the site prior to any constructionactivity.