Appendix B Action and Limit Levels
for Air Quality and Noise Monitoring
Table B.1 Action and Limit Levels for
1-hour and 24-hour TSP
|
Action Level, mg/m3 |
Limit Level, mg/m3 |
1-hour TSP* |
340 |
500 |
24-hour TSP |
190 |
260 |
T
No Action/Limit Level for 1-hour
TSP is applied to AM4 where no real time dust monitor is installed.
B.2. Noise
Table B.2 presents
the Action and Limit (AL) levels for construction noise other than percussive
piling.
Table B.2 AL Levels for Construction Noise (Other than Percussive Piling)
Parameters |
Action |
Limit |
Noise Levels at the NSR's at Long Tsai Tsuen/Hung
Shing Ye and school within the village of Tai Wan San Tsuen predicted by the
noise alarm monitoring system |
When one or more documented complaints are
received |
a. 75 dB(A) in LAeq,30 min
(07:00-19:00 hrs on normal weekdays) (Note 1) b. subject
to statutory control under the Noise Control Ordinance (07:00-23:00 hrs on holidays and 19:00-23:00 hrs on
all other days). Set to 60 dB(A) in LAeq,5 min c. subject to statutory control under the Noise Control Ordinance (23:00-07:00 hrs of next day). Set to 45 dB(A) in LAeq,5 min |
Manual noise monitoring at the nearest Pak Kok
Tsui residences to cable landing points N4 and N5 |
||
Note: 1.
For
educational institution, the limit level shall be 70 dB(A), reduced to 65
dB(A) during examination periods. |