APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: October 2005

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. (%)
04/10/2005	56	42	39	47	20.6	010	70
10/10/2005	74	66	70	85	31.4	080	74
16/10/2005	154	*	147	151	14.2	110	75
18/10/2005	-	111	-	-	34.0	090	70
22/10/2005	118	116	113	#	28.7	020	61
25/10/2005	-	-	-	58	24.4	080	73
28/10/2005	46	49	41	63	26.4	080	79

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
04/10/2005	15:00-15:59	57	43	33
	16:00-16:59	34	35	39
	17:00-17:59	50	48	47
10/10/2005	15:00-15:59	84	82	75
	16:00-16:59	89	88	86
	17:00-17:59	80	80	77
16/10/2005	15:00-15:59	161	155	138
	16:00-16:59	140	140	127
	17:00-17:59	135	131	128
22/10/2005	15:00-15:59	123	130	113
	16:00-16:59	119	122	109
	17:00-17:59	123	115	112
28/10/2005	15:00-15:59	40	44	41
	16:00-16:59	43	41	46
	17:00-17:59	44	48	47

* - 24-hr TSP sampler at AM2 (East Gate) was found defective on 17/10/2005, during the collection of filter sample. Defect was rectified on the same day. A 24-hr TSP make-up sampling was conducted on 18/10/2005.

# - 24-hr TSP sampler at AM4 (Tai Yuen Village) was found defective on 24/10/2005, during the collection of filter sample. Defect was rectified on the same day. A 24-hr TSP make-up sampling was conducted on 25/10/2005.

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