APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 2018

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. (%)
1/12/2018	55	29*(4/12)	51	69	27.7	060	78
7/12/2018	28	33	29	33	34.3	070	88
13/12/2018	51	50	48	42	27.8	360	68
19/12/2018	68	53	56	64	31.5	060	78
25/12/2018	33	31	31	26	25.8	060	81
31/12/2018	61	72	57	83	26.8	360	68

* - TSP monitoring at AM2 (East Gate) was suspended on 01/12/2018 due to the maintenance of the TEOM. Make-up 24-hr TSP sampling at AM2 was conducted on 04/12/2018.

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
1/12/2018	15:00 - 15:59	27	16*(4/12)	45
	16:00 - 16:59	38	17*(4/12)	49
	17:00 - 17:59	50	17*(4/12)	49
7/12/2018	15:00 - 15:59	26	28	28
	16:00 - 16:59	24	34	29
	17:00 - 17:59	19	38	28
13/12/2018	15:00 - 15:59	74	117	76
	16:00 - 16:59	87	120	82
	17:00 - 17:59	74	99	80
19/12/2018	15:00 - 15:59	66	50	54
	16:00 - 16:59	67	54	56
	17:00 - 17:59	71	59	60
25/12/2018	15:00 - 15:59	43	39	37
	16:00 - 16:59	45	42	39
	17:00 - 17:59	46	41	40
31/12/2018	15:00 - 15:59	75	146	81
	16:00 - 16:59	87	188	89
	17:00 - 17:59	87	138	89

* - TSP monitoring at AM2 (East Gate) was suspended on 01/12/2018 due to the maintenance of the TEOM. Make-up 24-hr TSP sampling at AM2 was conducted on 04/12/2018.

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