Restricted Hours Noise Monitoring Results (Evening Time)

Station NM6 Customs' Marine Base (Block H of Government Dockyard) Rooftop

Date

Start Time

End Time

Weather

Noise level (dB(A)), 5 min+

Major Construction Noise Source(s) Observed

Other Noise Source(s) Observed

Remarks

Mean Temp. (°C)

Mean Wind Speed (m/s)

Noise Meter Model / ID

Calibrator Model / ID

Leq

L10

L90

07-Apr-10

22:41

22:46

Fine

63

64

62

excavation  in process

cargo transport, engine noise from barge anchored at nearby piers.

-

22.9

<5 m/s

B&K 2238

B&K 4231

22:46

22:51

Fine

63

64

62

22:51

22:56

Fine

62

63

61

17-Apr-10

19:05

19:10

Fine

63

64

62

excavation in process

cargo transport, engine noise from barge anchored at nearby piers.

-

18.4

<5 m/s

B&K 2238

B&K 4231

19:10

19:15

Fine

63

64

62

19:15

19:20

Fine

63

64

62

23-Apr-10

21:47

21:52

Fine

63

64

63

excavation in process and crane in operation

engine noise from barge anchored at nearby piers

-

21

<5 m/s

B&K 2238

B&K 4231

21:52

21:57

Fine

63

64

62

21:57

22:02

Fine

63

64

62

30-Apr-10

19:00

19:05

Fine

64

66

63

excavation in process and crane in operation

cargo transport, engine noise from barge anchored at nearby piers.

-

21.3

<5 m/s

B&K 2238

B&K 4231

19:05

19:10

Fine

63

64

63

19:10

19:15

Fine

64

64

63

Min.

62

Max.

64