APPENDIX D  AIR QUALITY MONITORING RESULTS

 

Site: Lamma Power Station Extension

 

Month: December 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.

 

(%)

02/12/2003

91

89

112

101

22.5

070

68

08/12/2003

97

100

109

(2)

37.9

060

73

10/12/2003

-

-

-

142

25.7

010

69

14/12/2003

100

96

113

100

19.6

010

56

20/12/2003

136

141

151

151

26.5

020

45

26/12/2003

184

177

188

172

30.4

010

49

 

1 hour TSP Measurement:-

Date

Time

TSP concentration (mg/m3)

Reservoir

(AM1)

East Gate

(AM2)

Ash Lagoon

(AM3)

02/12/2003

15:00-15:59

124

105

124

16:00-16:59

89

84

88

17:00-17:59

91

84

92

08/12/2003

15:00-15:59

87

81

86

16:00-16:59

93

85

94

17:00-17:59

85

83

88

14/12/2003

15:00-15:59

102

106

102

16:00-16:59

100

107

101

17:00-17:59

105

99

110

20/12/2003

15:00-15:59

122

141

114

16:00-16:59

109

95

115

17:00-17:59

130

129

129

26/12/2003

15:00-15:59

267

249

243

16:00-16:59

215

216

214

17:00-17:59

199

219

209

 

Remark:

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

(2)            MiniVol TSP sampler at AM4 was found defective during the collection of filter paper on 9/12/2003.  The defect was rectified on the same day.  A make-up 24 hr TSP sampling for AM4 was performed on 10/12/2003.

 

                                                                        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