1. Location
1.1 The noise survey for operation activities of the WFM was carried out in the existing temporary Wholesale Fish Market at Sam Shing Estate.
2. Date
and Time
2.1 The noise survey was carried out on 25 August 2001 between 03:00 to 05:00.
3. Personnel
3.1 Mr. James Wong (AEC)
Mr. Adi Lee (AEC)
Ms. Alice Tang (AEC)
4. Instrumentation
4.1 Type 1 sound level meter; SLM (Rion NA27) and Calibrator (Rion NC73) were used to perform the noise survey.
5. Weather
Conditions and sea condition
5.1 The wind was calm and the sky was clear.
6. Survey
Procedure
6.1 The SLM was placed at a height of 1.2m above ground surface. The SLM was positioned at a place with no sound reflecting objects in its vicinity. The dormant noise emission is from the selected operation activities.
6.2 The SLM was positioned at a distance 2 m away the centre of the activities.
6.3 The SLM was calibrated immediately prior to and following each noise measurement.
6.4 The noise equivalent levels (Leq) with 2 minutes measurement period were recorded and converted to the sound power level using the following equation:
Leq = Lw - 20log r – 8
where:
Leq is the equivalent sound pressure
level, dB reference to 2 x 10-5Pa
Lw is the sound power level of the
source, dB(A)
r is the slant distance between noise source and
the receiver (m)
6.5 The noise survey record sheets are attached.
7. Noise
Survey Result
7.1 The noise survey results are attached in the record sheet.
Monitoring Location |
Exiting temporary Wholesale Fish Market (WFM) |
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Date of Monitoring |
25-8-01 |
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Time (hh:mm) |
0300 – 0500 |
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Weather Condition |
Clear Sky |
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Wind Speed |
Calm |
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Investigators |
James Wong, Adi Lee & Alice Tang |
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Sound Level Meter (Model, S/N) |
Rion, NA27 |
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Calibrator (Model, S/N) |
Rion, NC 73 |
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Calibration |
Before: 94.0 dB(A) |
After: 94.0 dB(A) |
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Measurements Results |
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Operation Activities |
Location |
Number of Source |
Noise Levels, Leq,
dB(A) |
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Icing Machine |
G/F |
2 |
82 |
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Unloading of fish containers from sea vessels |
Pier, G/F |
4 |
79 |
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Auction and Marshalling |
G/F |
4 |
80 |
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Weighting Operation |
G/F |
4 |
85 |
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Loading of fish containers to lorries |
Car Park, G/F |
4 |
70 |
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