APPENDIX D  AIR QUALITY MONITORING RESULTS

 

Site: Lamma Power Station Extension

 

Month: August 2003

 

24 hour TSP Measurement:-

Date

TSP concentration (mg/m3)

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.

 

(%)

04/08/2003

41

65

20

21

22.9

230

79

10/08/2003

27

27

17

15

15.3

230

77

16/08/2003

23

24

28

19

7.8

060

87

22/08/2003

20

24

28

(2)

17.5

110

91

28/08/2003

28

25

18

38

10.9

160

77

 

1 hour TSP Measurement:-

Date

Time

TSP concentration (mg/m3)

Reservoir

(AM1)

East Gate

(AM2)

Ash Lagoon

(AM3)

04/08/2003

15:00-15:59

28

93

26

16:00-16:59

42

108

23

17:00-17:59

41

84

25

10/08/2003

15:00-15:59

26

27

16

16:00-16:59

20

26

21

17:00-17:59

31

37

28

16/08/2003

15:00-15:59

17

17

11

16:00-16:59

3

6

8

17:00-17:59

10

6

10

22/08/2003

15:00-15:59

18

22

21

16:00-16:59

13

13

15

17:00-17:59

15

17

16

28/08/2003

15:00-15:59

26

24

18

16:00-16:59

20

23

19

17:00-17:59

23

28

25

 

Remark:

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

(2)                 The 24 hour TSP sample at AM4 on 22/8/2003 was void due to the breakdown of TSP Sampler, identified during the collection filter paper on 26/8/2003, the first working day after weekend and typhoon Krovanh.  The defect was rectified on 27/8/2003.  As the next sampling was scheduled on 28/8/2003, no make-up sampling can be arranged.

 

                                                                        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