| Appendix 4.10 |
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| Assumed Powered Mechanical Equipment for Sewer Construction
(With the Use of Quiet Equipment) |
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| Breaking up pavement |
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| Powered Mechanical
Equipment |
Reference |
No. Items |
SWL/Item |
On-Time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Kick Ripper, Saw-and life
method |
R2 |
2 |
103 |
100% |
106 |
106.0 |
106.01 |
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| Excavation of Trench |
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| Powered Mechanical
Equipment |
Reference |
No. Items |
SWL/Item |
On-Time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Excavator
(mini) |
BS C.3, item 108 |
2 |
97 |
100% |
100 |
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| Hand-held breaker |
CNP 024 |
2 |
108 |
100% |
111 |
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| Air
Compressor |
BS C.7, item 17 |
2 |
90 |
100% |
93 |
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| Lorry
(mini) |
BS C.8, item 25 |
2 |
96 |
100% |
99 |
111.6 |
111.65 |
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| Installation of Pipes
and Bedding |
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| Powered Mechanical
Equipment |
Reference |
No. Items |
SWL/Item |
On-Time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Mobile crane (mini) |
BS C.7, item 118 |
2 |
99 |
100% |
102 |
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| Lorry (mini) |
BS C.8, item 25 |
2 |
96 |
100% |
99 |
103.8 |
103.77 |
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| Backfilling |
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| Powered Mechanical
Equipment |
Reference |
No. Items |
SWL/Item |
On-Time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Compactor |
CNP 050 |
2 |
105.0 |
100% |
108.0 |
108.0 |
108.01 |
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| Reinstating Road Surface |
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| Powered Mechanical
Equipment |
Reference |
No. Items |
SWL/Item |
On-time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Lorry (mini) |
BS C.8, item 25 |
2 |
96 |
100% |
99 |
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| Concrete
mixer (electric) |
CNP 045 |
2 |
96 |
100% |
99 |
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| Air
Compressor |
BS C.7, item 24 |
2 |
95 |
100% |
98 |
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| Vibratory poker,
hand-held (Electric) |
BS 5228, Table C.6, item 40 |
2 |
98 |
100% |
101 |
105.4 |
105.42 |
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| Note: |
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| BS BS5228 (1997) Part 1 Noise and Vibration
Control on Construction and open sites |
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| R2 -
Commercially available quiet concrete demolition method in Hong Kong |
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| DREDGING |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
On-time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Derrick barge |
CNP 061 |
1 |
104 |
100% |
104 |
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| Dredger, grab |
CNP 063 |
1 |
112 |
100% |
112 |
4 |
112.64 |
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| Appendix 4.3
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| Assumed Powered
Mechanical Equipment for Submarine Outfall Construction (Unmitigated) |
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| Erection of Steel Working Platflorm |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
On-time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Stage 1: Setting up Steel
Working Platform |
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| Air Compressor |
CNP 003 |
1 |
104 |
100% |
104 |
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| Percussion
Drill rig, equiped with down the hole hammer |
CNP 164 |
1 |
115 |
100% |
115 |
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| Generator |
CNP101 |
1 |
108 |
100% |
108 |
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| Crane |
CNP 048 |
1 |
112 |
100% |
112 |
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| Barge |
CNP 016 |
1 |
104 |
100% |
104 |
117.7 |
117.69 |
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| Stage 2: Grouting |
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| Generator |
CNP101 |
1 |
108 |
100% |
108 |
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| Grout Pump |
CNP 106 |
1 |
105 |
100% |
105 |
109.8 |
109.76 |
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| Stage 3: Installation of Steel Casing in Rock |
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| Air Compressor |
CNP 003 |
1 |
104 |
100% |
104 |
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| Percussion
Drill rig, equiped with ODEX |
CNP 164 |
1 |
115 |
100% |
115 |
115.3 |
115.33 |
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| Note:
Stages 1, 2 and 3 would not be conducted concurrently |
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| Erection of Scaffold |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
On-time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Generator |
CNP101 |
1 |
108 |
100% |
108 |
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| Vibrating Hammer |
CNP 172 |
1 |
115 |
100% |
115 |
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| Barge |
CNP 016 |
1 |
104 |
100% |
104 |
6 |
116.07 |
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| Drilling and Installation of HDPE Pipeline |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
On-time |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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| Horizontal Drilling System1 |
CNP 101 |
1 |
108 |
100% |
108 |
111.6 |
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| Direct-drive mixing system1 |
CNP 101 |
1 |
108 |
100% |
108 |
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| Reclaimer2 |
CNP 282 |
1 |
103 |
100% |
103 |
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| Note: |
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| 1 Based on diesel generator |
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| 2 Based on water pump |
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| BS
BS5228 (1997) Part 1 Noise and Vibration Control on Construction and
open sites |
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| Appendix 4.4 |
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| Assumed
Operation Equipment for STW |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
Screening* |
Sub-total |
Total SWL |
Total SWL |
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| (PME) |
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dB(A) |
dB(A) |
SWL dB(A) |
dB(A) |
dB(A) |
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| Submersible water pump |
CNP 283 |
2 |
85 |
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88 |
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| Equalisation transfer pump |
CNP 283 |
1 |
85 |
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85 |
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| Effluent lift pump |
CNP 283 |
1 |
85 |
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85 |
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| Sludge recycling pump |
CNP 283 |
2 |
85 |
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88 |
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| Sludge wasty pump |
CNP 283 |
2 |
85 |
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88 |
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| Sludge pump |
CNP 283 |
1 |
85 |
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85 |
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| Air blower |
estimate1 |
1 |
102 |
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102 |
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| Filter press |
estimate1 |
1 |
94 |
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94 |
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| Deodouriser |
estimate1 |
1 |
79 |
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79 |
10 |
103.28 |
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| Assumed Operation Equipment for Pumping
Stations P1a, P1b and P2 (Unmitigated) |
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| Powered Mechanical Equipment |
Reference |
No. Items |
SWL/Item |
Screening* |
Sub-total |
Total SWL |
Total SWL |
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dB(A) |
dB(A) |
SWL dB(A) |
dB(A) |
dB(A) |
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| Submersible water pump |
CNP 283 |
1 |
85 |
10 |
75 |
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| Deodouriser1 |
R1 |
1 |
79 |
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79 |
80.5 |
80.46 |
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| Note: |
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| *
Assume 10 dB(A) noise reduction for equipment placing in enclosure |
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| 1 Estimated SWLs of the equipment obtained
from contractors |
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| 1
Based on fan with 1700m3/hr flowrate |
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| R1
Good Practices on Ventilation System Noise Control (EPD) |
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