APPENDIX D AIR QUALITY MONITORING RESULTS

Site: Lamma Power Station Extension

Month: May 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. (%)
02/05/2006	30	30	27	32	24.8	240	86
08/05/2006	25	29	20	26	15.1	190	79
14/05/2006	86	66	62	61	29.2	010	69
20/05/2006	41	35	41	74	27.3	080	85
26/05/2006	25	30	18	22	22.3	230	80

1 hour TSP Measurement:-

Date	Time	TSP concentration (mg/m^3)
		Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
02/05/2006	15:00-15:59	28	40	*
	16:00-16:59	29	32	*
	17:00-17:59	35	38	*
03/05/2006	15:00-15:59	-	-	5
	16:00-16:59	-	-	16
	17:00-17:59	-	-	14
08/05/2006	15:00-15:59	30	36	12
	16:00-16:59	18	27	13
	17:00-17:59	13	17	11
14/05/2006	15:00-15:59	44	53	44
	16:00-16:59	52	58	50
	17:00-17:59	37	47	38
20/05/2006	15:00-15:59	41	39	37
	16:00-16:59	41	41	40
	17:00-17:59	44	43	42
26/05/2006	15:00-15:59	20	38	16
	16:00-16:59	18	38	20
	17:00-17:59	22	39	21

* - Missing data was due to failure of 1-hr TEOM TSP sampler at AM3 (Ash Lagoon) on 02/05/2006. Make-up 1-hr TSP sampling was conducted on 03/05/2006.

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