APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: June 2004

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. (%)
05/06/2004	-	37	37	-	24.7	100	80
08/06/2004	-	-	-	53	11.3	020	78
09/06/2004	72	-	-	-	9.6	160	77
11/06/2004	59	45	68	74	34.8	090	70
17/06/2004	29	31	25	18	12.0	170	80
23/06/2004	60	55	45	47	29.9	200	81
29/06/2004	79	95	69	65	20.3	280	72

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
05/06/2004	15:00-15:59	44	43	52
	16:00-16:59	37	37	43
	17:00-17:59	31	35	43
11/06/2004	15:00-15:59	65	63	64
	16:00-16:59	81	85	90
	17:00-17:59	79	73	80
17/06/2004	15:00-15:59	13	32	16
	16:00-16:59	26	29	24
	17:00-17:59	16	27	19
23/06/2004	15:00-15:59	37	59	24
	16:00-16:59	76	82	59
	17:00-17:59	35	55	32
29/06/2004	15:00-15:59	69	99	88
	16:00-16:59	181	172	157
	17:00-17:59	122	126	105

Remark:

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

(2) HVAS at AM1 was found defective during collection of filter sample on 7/6/2004. Defect was rectified on 8/6/2004. A make-up 24 hours TSP sampling at AM1 was conducted on 9/6/2004.

(3) MiniVol at AM4 was found defective during collection of filter sample on 7/6/2004. Defect was rectified on the same day. A make-up 24 hours TSP sampling at AM1 was conducted on 8/6/2004.

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