APPENDIX D AIR QUALITY MONITORING RESULTS
Site: Lamma Power
Station Extension
Month: April 2025
24 hour TSP
Measurement:-
|
Date |
TSP concentration
(mg/m3) |
Weather
Information (From Hong Kong
Observatory) |
|||||
|
Reservoir (AM1) |
East Gate (AM2) |
Ash Lagoon (AM3) |
Tai Yuen Village (AM4) |
Mean Wind Speed (km/hr) |
Prevailing Wind
Dir. (°) |
Mean R.H. (%) |
|
|
3/4/2025 |
45 |
53 |
47 |
7 |
12.8 |
50 |
57 |
|
9/4/2025 |
46 |
42 |
35 |
14 |
4.0 |
210 |
77 |
|
15/4/2025 |
249^ |
256^ |
205^ |
163 |
12.4 |
40 |
48 |
|
21/4/2025 |
36 |
22 |
18 |
25 |
14.0 |
190 |
79 |
|
27/4/2025 |
26 |
23 |
22 |
31 |
18.4 |
50 |
92 |
^ - Action level exceedances
of 24-hour TSP were recorded at AM1 to AM3 on 15 April 2025. According to the information from EPD,
the high dust episode was due to the influence of a dusty air stream associated
with the northeast monsoon and all EPD monitoring stations also recorded daily
AQO exceedance for RSP. As such, we
are of the view that the 24-hour action level exceedances are non-project
related.
1 hour TSP Measurement:-
|
Date |
Time |
TSP concentration
(mg/m3) |
||
|
Reservoir (AM1) |
East Gate (AM2) |
Ash Lagoon (AM3) |
||
|
3/4/2025 |
15:00 - 15:59 |
49 |
140 |
43 |
|
16:00 - 16:59 |
48 |
147 |
41 |
|
|
17:00 - 17:59 |
44 |
57 |
37 |
|
|
9/4/2025 |
15:00 - 15:59 |
28 |
29 |
27 |
|
16:00 - 16:59 |
24 |
32 |
26 |
|
|
17:00 - 17:59 |
26 |
33 |
25 |
|
|
15/4/2025 |
15:00 - 15:59 |
226 |
228 |
177 |
|
16:00 - 16:59 |
220 |
231 |
195 |
|
|
17:00 - 17:59 |
266 |
243 |
219 |
|
|
21/4/2025 |
15:00 - 15:59 |
27 |
20 |
17 |
|
16:00 - 16:59 |
87 |
21 |
17 |
|
|
17:00 - 17:59 |
124 |
20 |
15 |
|
|
27/4/2025 |
15:00 - 15:59 |
23 |
22 |
21 |
|
16:00 - 16:59 |
21 |
21 |
21 |
|
|
17:00 - 17:59 |
22 |
21 |
22 |
|
1-hr TSP 24-hr
TSP
(mg/m3) (mg/m3)
Action Level 340 190
Limit Level 500 260
Calibration: Calibration
details are shown in appendix F.
Equipment used:
|
Location |
1-hr TSP |
24-hr TSP |
|
Reservoir, East
Gate and Ash Lagoon |
TEOM |
TEOM |
|
Tai Yuen Village |
- |
MINIVOL Portable
Sampler |
