APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: October 2002

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. (%)
02/10/2002	54	50	52	(2)	13.6	070	78
04/10/2002	-	-	-	50	24.3	070	82
08/10/2002	98	123	108	82	21.2	010	45
14/10/2002	33	33	39	44	26.5	070	77
20/10/2002	15	15	13	11	8.8	220	80
26/10/2002	48	48	47	51	23.3	080	78

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
02/10/2002	15:00-15:59	41	41	42
	16:00-16:59	33	30	36
	17:00-17:59	13	22	14
08/10/2002	15:00-15:59	107	112	90
	16:00-16:59	104	199	116
	17:00-17:59	111	109	132
14/10/2002	15:00-15:59	23	27	29
	16:00-16:59	43	46	48
	17:00-17:59	46	50	47
20/10/2002	15:00-15:59	11	16	12
	16:00-16:59	24	0	8
	17:00-17:59	25	13	13
26/10/2002	15:00-15:59	45	43	43
	16:00-16:59	50	47	48
	17:00-17:59	47	48	49

Remark:

(1) The monitoring stations, Reservoir, East Gate & Ash Lagoon are located within Lamma Power Station.

(2) MiniVol TSP sampler at AM4 (Tai Yuen Village) was found defective during the collection of filter paper on 3/10/2002. The defect was rectified on the same day. A make-up 24hr TSP sampling for AM4 was carried out on 4/10/2002.

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 and East Gate	TEOM 1400a	High Volume Air Sampler
Ash Lagoon		Partisol Model 2000 Sampler
Tai Yuen Village	-	MINIVOL Portable Sampler