APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 2017

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. (%)
06/12/2017	61	67	61	56	28.2	70	73
12/12/2017	36 (14/12)*	85	78	82	36.3	70	70
18/12/2017	74	90	79	76	32.7	360	57
24/12/2017	108	121	116	167	22.8	360	60
30/12/2017	26	29	25	29	23.7	50	71

Note:

* - TSP monitoring at AM2 (East Gate) was suspended on 12/12/2017 due to the breakdown of TEOM TSP Sampler. Make-up 24-hr TSP sampling at AM2 was conducted on 14/12/2017.

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
06/12/2017	15:00 - 15:59	70	67	76
	16:00 - 16:59	70	73	70
	17:00 - 17:59	70	72	63
12/12/2017	15:00 - 15:59	33 (14/12)*	106	109
	16:00 - 16:59	41 (14/12)*	102	107
	17:00 - 17:59	42 (14/12)*	95	107
18/12/2017	15:00 - 15:59	98	113	111
	16:00 - 16:59	100	109	112
	17:00 - 17:59	87	105	103
24/12/2017	15:00 - 15:59	103	136	115
	16:00 - 16:59	104	119	113
	17:00 - 17:59	87	107	96
30/12/2017	15:00 - 15:59	32	32	32
	16:00 - 16:59	34	38	40
	17:00 - 17:59	51	37	49

Note:

* - TSP monitoring at AM2 (East Gate) was suspended on 12/12/2017 due to the breakdown of the TEOM TSP sampler. Make-up 1-hr TSP sampling at AM2 was conducted on 14/12/2017.

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