| Table
C-5 Sound Power Level (SWL) Evaluation - 2nd Level Mitigation Measures
(Barrier Correction) |
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Activities |
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PME |
TM ID Code / BS5228 |
Ref. No. |
Unit |
SWL dB(A) |
Sub-SWL |
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| Powered
Mechanical Equipment Used (Installation of Underground Cable) |
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| A |
Road Breaking |
A1 |
Air Compressor |
CNP001
(w/ enclosure) |
- |
1 |
90 |
100 |
1000000000 |
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Hand-held Breaker |
CNP023 |
- |
1 |
98 |
99 |
6309573445 |
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Total SWL |
99 |
|
7309573445 |
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A2 |
Dump Truck |
Table C.9 |
27 |
1 |
100 |
103 |
10000000000 |
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Total SWL |
100 |
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10000000000 |
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A3 |
Backhoe |
Table C.3 |
97 |
1 |
100 |
104.5 |
10000000000 |
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Total SWL |
100 |
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10000000000 |
| B |
Trench Excavation |
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Backhoe |
Table C.3 |
97 |
1 |
100 |
112 |
10000000000 |
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Total SWL |
100 |
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10000000000 |
| C |
Road Reinstatement |
C1 |
Compactor |
CNP050 |
- |
1 |
100 |
105 |
10000000000 |
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Total SWL |
100 |
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10000000000 |
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C2 |
Concrete Lorry Mixer |
Table C.6 |
35 |
1 |
100 |
103 |
10000000000 |
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Total SWL |
100 |
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10000000000 |
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C3 |
Vibratory Poker |
Table C.6 |
32 |
1 |
95 |
104 |
3162277660 |
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Total SWL |
95 |
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3162277660 |
| Powered
Mechanical Equipment Used (Construction of Cable Tunnel) |
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1 |
| A |
General |
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Loader |
Table C.3 |
97 |
1 |
105 |
112 |
31622776602 |
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Backhoe / Muck Car |
Table C.3 |
97 |
1 |
105 |
113 |
31622776602 |
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Concrete Lorry Mixer |
Table C.6 |
35 |
1 |
100 |
113 |
10000000000 |
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Mobile Crane |
Table C.7 |
114 |
1 |
101 |
113.5 |
12589254118 |
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Dump Trucks |
Table C.9 |
27 |
1 |
105 |
114 |
31622776602 |
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Concrete Pump |
Table C.6 |
36 |
1 |
106 |
114.5 |
39810717055 |
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Mobile generator |
Table C.7 |
62 |
1 |
100 |
114.5 |
10000000000 |
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Compressor |
Table C.7 |
25 |
1 |
98 |
114.5 |
6309573445 |
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Water Pump |
CNP 281 |
- |
1 |
88 |
114.5 |
630957344.5 |
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Ventilation Fan |
CNP 241 |
- |
1 |
109 |
115.5 |
79432823472 |
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Total SWL |
114 |
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2.53642E+11 |
| B |
Site Formation |
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Rock Drill
(Hydraulic) |
CNP 182 |
- |
1 |
113 |
123 |
1.99526E+11 |
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Shotcrete Vehicle |
Table C.6 |
36 |
1 |
106 |
114 |
39810717055 |
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Lorry |
Table C.9 |
27 |
1 |
105 |
114.5 |
31622776602 |
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Total SWL |
114 |
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2.7096E+11 |
| C |
TBM Tunnel Construction |
Tunnel Boring Machine |
- |
- |
1 |
88 |
80 |
630957344.5 |
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(Envisaged Design) |
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Conveyor Belt System |
CNP 041 |
- |
1 |
90 |
92 |
1000000000 |
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Total SWL |
92 |
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1630957344 |
| D |
Drill
& Blast Tunnel Construction |
Rock Drill
(Hydraulic) |
CNP 182 |
- |
1 |
113 |
123 |
1.99526E+11 |
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(Alternative Design) |
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Conveyor Belt System |
CNP 041 |
- |
1 |
90 |
113 |
1000000000 |
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Shotcrete Vehicle |
Table C.6 |
36 |
1 |
106 |
114 |
39810717055 |
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Lorry |
Table C.9 |
27 |
1 |
105 |
114.5 |
31622776602 |
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Total SWL |
114 |
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2.7196E+11 |
| E |
Lining construction |
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Concrete Delivery
Truck |
Table C.6 |
35 |
1 |
100 |
123 |
10000000000 |
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Pumping Plant |
Table C.6 |
36 |
1 |
106 |
107 |
39810717055 |
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Total SWL |
107 |
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49810717055 |
| Remarks: |
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| 1 |
PME in italics means
quiet plant taking place. |
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| 2 |
Underlined PME means a 5
dB(A) or 10 dB(A) reduction by using temporary movable barrier or acoustic
shed. |
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