|
2.
ASSESSMENT OF NOISE FROM THE CONSTRUCTION WORK
| 2.1 |
Step 1- Location of the Most Affected Noise Sensitive
Receiver (NSR)
The
NSR which will be most affected by noise from the construction
work shall be identified.
For
the purpose of this Technical Memorandum any domestic
premises, hotel, hostel, temporary housing accommodation,
hospital, medical clinic, educational institution, place
of public worship, library, court of law or performing
arts centre shall be considered to be a NSR. Any other
premises or place, not being in the nature of either
industrial or commercial premises, which is considered
by the Authority to have a similar sensitivity to noise
as the premises and places above shall also be considered
to be a NSR. Any premises or place shall, however, be
considered to be a NSR only when it is in use for its
intended purpose.
|
| |
|
| 2.2 |
Step 2 - Determination of the Area Sensitivity Rating
(ASR)
| 2.2.1 |
General
The
ASR is a function of the type of area within which
the NSR is located and the degree of the effect
on the NSR of particular Influencing Factors (IFs)
as defined in Section 2.2.3. After a careful examination
of the area under consideration and the effect
of any IFs, the ASR may be determined from Table
1.
|
| |
|
| 2.2.2 |
Type of area within which the Noise Sensitive
Receiver (NSR) is located
The
Authority shall have regard to an area of adequate
size when determining the type of area within
which the NSR is located in accordance with the
descriptions in Table 1. Typically, in urban areas
an area of 100 m radius around the NSR should
be adequate, whereas in sparsely developed areas,
such as rural districts, an area of 500 m radius
or even more should be considered, depending upon
the circumstances. Special factors may dictate
that other distances should be used at the discretion
of the Authority.
|
| |
|
| 2.2.3 |
Effect of Influencing Factors (IFs)
For
the purpose of this Technical Memorandum any industrial
area, major road or the area within the boundary
of Hong Kong International Airport shall be considered
to be an IF. Industrial areas and the Airport
should be regarded as IFs irrespective of the
time of day.
The
term "industrial area" means an area
which consists of a number of factories or industrial
undertakings located primarily in purpose-built
industrial buildings. It includes any premises,
buildings or activities which the Authority deems,
by virtue of their acoustical characteristics,
make an area industrial in nature. The term "major
road" means a road which has a heavy and
generally continuous flow of vehicular traffic
and, in normal circumstances, means a road with
an annual average daily traffic flow in excess
of 30,000. Where a major road has an unusually
low traffic flow rate (less than 300 vehicles
per hour) at the time of day under consideration
it shall not be considered as an IF at that time.
In
situations where more than one IF affects the
NSR to an equal degree only one IF shall be considered.
|
| |
|
| 2.2.4 |
Area Sensitivity Rating (ASR)
The
Authority shall determine the appropriate ASR
for the NSR under consideration from Table 1
|
|
|
|