APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: March 2006

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. (%)
03/03/2006	60	54	63	63	23.6	070	74
09/03/2006	94	68	74	85	8.3	030	87
15/03/2006	*	57	67	81	23.4	050	82
17/03/2006	82	-	-	-	18.3	030	91
21/03/2006	124	111	124	143	17.3	040	91
27/03/2006	50	42	41	54	21.5	040	96

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
03/03/2006	15:00-15:59	53	57	43
	16:00-16:59	59	62	53
	17:00-17:59	41	37	54
09/03/2006	15:00-15:59	76	78	56
	16:00-16:59	96	83	58
	17:00-17:59	113	91	66
15/03/2006	15:00-15:59	62	71	60
	16:00-16:59	60	69	61
	17:00-17:59	72	77	68
21/03/2006	15:00-15:59	117	120	120
	16:00-16:59	142	144	146
	17:00-17:59	161	152	165
27/03/2006	15:00-15:59	31	43	33
	16:00-16:59	46	51	46
	17:00-17:59	64	59	57

* - 24-hr TSP sampler at AM1 (Reservoir) was found defective on 16/03/2006, during the collection of filter sample. Defect was rectified on the same day. A 24-hr TSP make-up sampling was conducted on 17/03/2006.

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