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. |