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
06-Jul-12 14:25 14:55 Sunny 67 68 66 - Traffic Noise - 30 0.3 RION- NL31 (S/N 00603867) RION - NC73 (S/N 10997142)
12-Jul-12 09:20 09:50 Sunny 67 68 65 No outdoor construction Traffic Noise - 31 0.3 RION- NL31 (S/N 00710259) RION - NC73 (S/N 10997142)
18-Jul-12 10:32 11:02 Cloudy 67 68 65 No outdoor construction Traffic Noise - 31 0.3 RION- NL31 (S/N 00710259) RION - NC73 (S/N 10997142)
24-Jul-12 13:03 13:33 Cloudy 66 68 64 No outdoor construction Traffic Noise - 27 1.8 RION- NL31 (S/N 00710259) RION - NC73 (S/N 10997142)
30-Jul-12 14:30 15:00 Sunny 67 69 65 - Traffic Noise - 30 0.3 RION- NL31 (S/N 00710259) RION - NC73 (S/N 10997142)
                           
      Min. 66                
  Max. 67   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
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
03-Jul-12 14:06 14:36 Sunny 62 65 58 Holes drilling in tunnel Road traffic noise  N.A 29.1 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
09-Jul-12 13:23 13:53 Sunny 63 66 57 Holes drilling in tunnel Road traffic noise  N.A 29.8 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
19-Jul-12 14:01 14:31 Cloudy 63 67 58 Holes drilling in tunnel Road traffic noise  N.A 30.2 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
26-Jul-12 Noise monitoring was cancelled due to raining
31-Jul-12 09:38 10:08 Sunny 63 65 58 Works in tunnel Road traffic noise  N.A 29.2 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
      Min. 62                
      Max. 63                
                     
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-Jul-12 10:04 10:34 Cloudy 59 59 51 Shotcreting N.A Free-field measurement, +3dB correction. 27.8 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
11-Jul-12 10:04 10:34 Cloudy 59 59 51 Shotcreting N.A Free-field measurement, +3dB correction. 30 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
17-Jul-12 14:55 15:25 Sunny 54 56 51 Operation of gantry N.A Free-field measurement, +3dB correction. 30 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
23-Jul-12 10:50 11:20 Cloudy 67 69 57 Operation of gantry N.A Free-field measurement, +3dB correction. 26.4 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
                           
      Max. 54                
      Max. 67                
                         
                         
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-Jul-12 09:40 10:10 Cloudy 64.3 65.9 62.0 Holes drilling N.A N.A 27.8 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
11-Jul-12 09:42 10:12 Sunny 65.5 66.4 62.7 Holes drilling N.A N.A 30 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
17-Jul-12 13:38 14:08 Sunny 62.9 64.2 60.6 Operation of mobile crane and loading N.A N.A 30 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
23-Jul-12 09:40 10:10 Cloudy 62.2 64.6 56.9 Operation of mobile crane and loading N.A N.A 26.4 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
                           
      Min. 62.2                
      Max. 65.5                
Station M8, Wah Lai 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
03-Jul-12 10:00 10:30 Sunny 67 68 66 Rock out and operating of excavator Road Traffic noise from Shek Pai Wan Road  N.A 29.1 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
09-Jul-12 09:36 10:06 Sunny 66 68 65 Rock out and operating of excavator Road Traffic noise from Shek Pai Wan Road  N.A 29.8 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
19-Jul-12 09:57 10:27 Sunny 66 67 64 Shotcrete Road Traffic noise from Shek Pai Wan Road  N.A 30.2 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
25-Jul-12 09:36 10:06 Cloudy 65 66 64 Rock out and excavator operation Road Traffic noise from Shek Pai Wan Road  N.A 25.7 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
31-Jul-12 14:11 14:41 Sunny and Haze 66 67 63 Rock out Road Traffic noise from Shek Pai Wan Road  N.A 29.2 <5 B&K 2238   S/N : 2385180 B&K 4231  S/N: 2656516
      Max. 65                
      Max. 67