APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 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. (%)
02/12/2004	70	57	71	54	26.1	050	76
08/12/2004	141	120	105	99	21.2	010	55
14/12/2004	79	65	73	64	29.3	070	72
20/12/2004	95	72	78	81	17.6	090	81
26/12/2004	(1)	40	43	60	28.8	090	78
30/12/2004	158	-	-	-	33.9	010	68

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
02/12/2004	15:00-15:59	71	58	71
	16:00-16:59	71	61	73
	17:00-17:59	73	65	76
08/12/2004	15:00-15:59	91	98	96
	16:00-16:59	88	87	90
	17:00-17:59	87	72	91
14/12/2004	15:00-15:59	61	61	58
	16:00-16:59	59	50	58
	17:00-17:59	59	55	63
20/12/2004	15:00-15:59	87	90	53
	16:00-16:59	79	69	54
	17:00-17:59	86	81	60
26/12/2004	15:00-15:59	39	39	40
	16:00-16:59	51	47	46
	17:00-17:59	46	43	48

Remark:

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

(2) HVAS 24-hr TSP sampler at AM1 (Reservoir) was found defective on 28/12/2004, during the collection of filter sample. Defect was rectified on 29/12/2004. A make-up 24-hr TSP sampling for AM1 was carried out on 30/12/2004.

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