Daytime Noise Monitoring Results -- Normal weekday

Station M3, Kwan Yick building(*)

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Temp. (°C)

Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

01-Jun-12

14:22

14:52

Fine

67

68

66

-

Traffic Noise

-

28.0

0.5

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

07-Jun-12

10:22

10:52

Sunny

67

69

66

No outdoor construction

Traffic Noise

-

28.0

0.2

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

13-Jun-12

14:15

14:45

Cloudy

68

69

66

No outdoor construction

Traffic Noise

-

30.0

0.2

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

19-Jun-12

14:25

14:55

Cloudy

67

68

65

No outdoor construction

Traffic Noise

-

29.0

0.5

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

25-Jun-12

10:23

10:53

Cloudy

68

69

66

-

Traffic Noise

-

29.0

0.3

RION- NL31 (S/N 00603867)

RION - NC73 (S/N 10997142)

Min.

67

Max.

68

Remark: (*): The data were provided by Contract No. DC/2007/23. Calibration certificates for the noise meter(s) and calibrator(s) used were included in the corresponding Monthly EM&A Report for this Contract

Station M5, Chuk Lam Ming Tong

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Temp. (°C)

Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

05-Jun-12

13:01

13:31

Sunny

62

64

58

Rock out

Road traffic noise and drilling in process in nearby building

N.A

28.2

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

11-Jun-12

13:31

14:01

Sunny

67

68

60

Rock out

Road traffic noise and drilling in process in nearby building

N.A

29.4

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

21-Jun-12

10:12

10:42

Sunny

75

81

67

Muck out and holes drilling in tunnel

Road traffic noise ,mainly from rock breaking near roadside from other contractor

N.A

28.3

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

27-Jun-12

10:07

10:37

Sunny

76

82

62

Muck out and holes drilling in tunnel

Road traffic noise ,mainly from rock breaking adjacent roadside of NSR from other contractor

N.A

27.4

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

Min.

62

Max.

76

Station M6a, Aegean Terrace

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Temp. (°C)

Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq *

L10

L90

04-Jun-12

10:41

11:11

Fine

61

64

57

Drilling and loading

Loading from the construction site near Cyberport PTW

Free-field measurement, +3dB correction.

27.0

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

14-Jun-12

13:30

14:00

Fine

55

57

53

Loading and operation of mobile crane

Loading from the construction site near Cyberport PTW

Free-field measurement, +3dB correction.

27.4

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

20-Jun-12

11:22

11:52

Drizzle

54

56

48

Loading and operation of mobile crane

N.A

Free-field measurement, +3dB correction.

29.9

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

27-Jun-12

11:25

11:55

Sunny

57

58

50

Operation of gantry

N.A

Free-field measurement, +3dB correction.

27.4

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

Max.

54

Max.

61

Remark: Free-field measurement, +3dB correction.

Station M7a, Wah Ming House

Date

Start Time

End Time

Weather

Noise level (dB(A)), 30 min

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Temp. (°C)

Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

04-Jun-12

09:37

10:07

Fine

65

66

64

Drilling

N.A

N.A

27.0

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

14-Jun-12

15:54

16:24

Fine

67

69

63

Rock out and operation of mobile crane

N.A

N.A

27.4

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

20-Jun-12

10:12

10:42

Drizzle

66

67

65

Operation of mobile crane

N.A

N.A

29.9

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

27-Jun-12

14:22

14:52

Sunny

67

68

64

Operation of mobile crane

N.A

N.A

27.4

<5

B&K 2238   S/N : 2385180

B&K 4231  S/N: 2656516

Min.

65

Max.

67