APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 2003

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. (%)
02/12/2003	91	89	112	101	22.5	070	68
08/12/2003	97	100	109	(2)	37.9	060	73
10/12/2003	-	-	-	142	25.7	010	69
14/12/2003	100	96	113	100	19.6	010	56
20/12/2003	136	141	151	151	26.5	020	45
26/12/2003	184	177	188	172	30.4	010	49

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
02/12/2003	15:00-15:59	124	105	124
	16:00-16:59	89	84	88
	17:00-17:59	91	84	92
08/12/2003	15:00-15:59	87	81	86
	16:00-16:59	93	85	94
	17:00-17:59	85	83	88
14/12/2003	15:00-15:59	102	106	102
	16:00-16:59	100	107	101
	17:00-17:59	105	99	110
20/12/2003	15:00-15:59	122	141	114
	16:00-16:59	109	95	115
	17:00-17:59	130	129	129
26/12/2003	15:00-15:59	267	249	243
	16:00-16:59	215	216	214
	17:00-17:59	199	219	209

Remark:

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

(2) MiniVol TSP sampler at AM4 was found defective during the collection of filter paper on 9/12/2003. The defect was rectified on the same day. A make-up 24 hr TSP sampling for AM4 was performed on 10/12/2003.

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