Appendix
4.2 |
Assumed Powered Mechanical Equipment for Sewer Construction
(Unmitigated) |
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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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
Circular saw |
CNP 201 |
2 |
108 |
100% |
111 |
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Air
Compressor |
CNP 002 |
2 |
102 |
100% |
105 |
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Hand-held breaker |
CNP 024 |
2 |
108 |
100% |
111 |
114.5 |
114.53 |
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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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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 |
CNP 002 |
2 |
102 |
100% |
105 |
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Lorry (mini) |
BS C.8, item 25 |
2 |
96 |
100% |
99 |
112.5 |
112.45 |
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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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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 |
CNP 002 |
2 |
102 |
100% |
105 |
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Vibratory poker hand-held |
CNP 170 |
2 |
113 |
100% |
116 |
116.5 |
116.50 |
Note: |
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BS BS5228 (1997) Part 1 Noise and Vibration
Control on Construction and open sites |
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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 |
(PME) |
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dB(A) |
% |
SWL dB(A) |
dB(A) |
dB(A) |
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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