APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: December 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. (%)
01/12/2002	51	53	51	42	37.4	070	90
07/12/2002	22	24	29	26	8.1	070	90
13/12/2002	66	55	53	46	33.8	040	71
19/12/2002	65	66	63	50	12.7	060	87
25/12/2002	49	60	59	60	29.4	010	74
31/12/2002	81	101	76	81	16.8	010	78

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
01/12/2002	15:00-15:59	77	75	79
	16:00-16:59	89	82	86
	17:00-17:59	86	82	87
07/12/2002	15:00-15:59	22	17	15
	16:00-16:59	30	27	20
	17:00-17:59	19	23	19
13/12/2002	15:00-15:59	61	61	59
	16:00-16:59	55	61	58
	17:00-17:59	50	51	54
19/12/2002	15:00-15:59	73	57	58
	16:00-16:59	39	30	41
	17:00-17:59	34	34	35
25/12/2002	15:00-15:59	50	55	50
	16:00-16:59	70	73	69
	17:00-17:59	60	68	62
31/12/2002	15:00-15:59	90	147	98
	16:00-16:59	124	148	114
	17:00-17:59	69	71	77

Remark:

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

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