APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: January 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. (%)
06/01/2003	87	105	88	76	41.5	060	80
12/01/2003	89	86	91	93	15.5	010	62
18/01/2003	59	50	54	51	16.8	100	66
24/01/2003	106	101	89	100	44.2	070	79
30/01/2003	72	70	(2)	75	42.7	070	74

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
06/01/2003	15:00-15:59	72	80	62
	16:00-16:59	52	77	46
	17:00-17:59	47	59	43
12/01/2003	15:00-15:59	100	96	91
	16:00-16:59	94	90	92
	17:00-17:59	84	71	88
18/01/2003	15:00-15:59	39	35	39
	16:00-16:59	67	75	61
	17:00-17:59	52	51	54
24/01/2003	15:00-15:59	84	78	87
	16:00-16:59	91	84	87
	17:00-17:59	96	88	94
30/01/2003	15:00-15:59	73	68	71
	16:00-16:59	69	65	70
	17:00-17:59	80	68	75

Remark:

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

(2) Partisol TSP sampler at AM3 (Ash Lagoon) was found defective during the collection of filter paper on 04/02/2003, the first working day after the Chinese New Year Holiday. The defect was rectified on the same day. As the next sampling is scheduled on 05/02/2003, no make-up sampling was performed.

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