APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: November 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. (%)
01/11/2002	63	116	53	14	29.6	010	73
07/11/2002	87	78	88	(1)	9.2	020	64
09/11/2002	-	-	-	86	41.5	070	72
13/11/2002	62	56	67	68	6.7	090	78
19/11/2002	32	33	31	28	34.8	060	81
25/11/2002	103	99	87	82	28.7	360	63

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
01/11/2002	15:00-15:59	45	147	45
	16:00-16:59	38	101	45
	17:00-17:59	41	153	41
07/11/2002	15:00-15:59	83	84	79
	16:00-16:59	91	88	81
	17:00-17:59	106	71	100
13/11/2002	15:00-15:59	78	64	73
	16:00-16:59	76	69	71
	17:00-17:59	76	70	71
19/11/2002	15:00-15:59	34	31	35
	16:00-16:59	39	33	42
	17:00-17:59	38	46	40
25/11/2002	15:00-15:59	71	64	70
	16:00-16:59	70	72	71
	17:00-17:59	70	68	73

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 8/11/2002. The defect was rectified on the same day. A make-up 24hr TSP sampling for AM4 was carried out on 9/11/2002.

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