Daytime Noise Monitoring Results -- Normal weekday

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

06-Mar-12

01:19

01:49

Sunny

63

66

60

Mud out and operation of mobile crane

N.A

N.A

23.8

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

12-Mar-12

09:24

09:54

Cloudy

70

72

67

Mud out and operation of mobile crane

Operation of hand held breaker from other contractor near Waterfall Bay Road

N.A

12.6

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

22-Mar-12

09:30

10:00

Cloudy

61

62

59

Grouting

N.A

N.A

20.7

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

28-Mar-12

09:30

10:00

Sunny

65

67

61

Grouting

N.A

N.A

21.1

<5

B&K 2238   S/N : 2684502

B&K 4231  S/N: 2656516

Min.

61

Max.

70