APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: September 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. (%)
03/09/2004	17	20	(2)	18	14.9	110	91
04/09/2004	-	-	22	-	6.7	160	81
09/09/2004	48	55	50	43	11.5	310	90
15/09/2004	146	130	144	172	7.1	200	63
21/09/2004	36	54	27	24	12.5	240	80
27/09/2004	105	102	92	86	10.0	010	59

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
03/09/2004	15:00-15:59	26	5	6
	16:00-16:59	27	14	10
	17:00-17:59	11	0	9
09/09/2004	15:00-15:59	64	77	82
	16:00-16:59	69	80	87
	17:00-17:59	63	86	71
15/09/2004	15:00-15:59	243	212	217
	16:00-16:59	162	166	162
	17:00-17:59	174	124	144
21/09/2004	15:00-15:59	31	41	22
	16:00-16:59	26	49	29
	17:00-17:59	27	84	27
27/09/2004	15:00-15:59	84	91	82
	16:00-16:59	87	92	79
	17:00-17:59	93	76	85

Remark:

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

(2) 24-hr TSP sampling at AM3 (Ash Lagoon) was found defective. MiniVol TSP sampler is used to temporarily replace the defective Partisol TSP sampler which was taken out of service for repair. Make-up TSP sampling at AM3 was conducted on 04/09/2004. Partisol TSP sampler was repaired and put back into service on 21/09/2004.

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 / MINIVOL Portable sampler
Tai Yuen Village	-	MINIVOL Portable Sampler