APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 2023

24 hour TSP Measurement:-

Date	TSP concentration (mg/m^3)				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. (%)
4/12/2023	59	67	37	50	10.9	80	76
10/12/2023	28	29	18	24	14.2	50	80
16/12/2023	47	185	38	32	32.7	360	71
22/12/2023	67	107	42	53	33.0	360	51
28/12/2023	43	85	28	33	21.8	50	73

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
4/12/2023	15:00 - 15:59	61	63	35
	16:00 - 16:59	63	57	39
	17:00 - 17:59	53	52	40
10/12/2023	15:00 - 15:59	39	49	25
	16:00 - 16:59	39	42	24
	17:00 - 17:59	36	41	25
16/12/2023	15:00 - 15:59	48	134	45
	16:00 - 16:59	46	112	38
	17:00 - 17:59	40	94	32
22/12/2023	15:00 - 15:59	57	112	45
	16:00 - 16:59	58	110	46
	17:00 - 17:59	63	109	46
28/12/2023	15:00 - 15:59	56	110	37
	16:00 - 16:59	46	121	40
	17:00 - 17:59	57	109	35

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