| 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 |
| (PME) |
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dB(A) |
dB(A) |
SWL dB(A) |
dB(A) |
dB(A) |
| 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 |
| (PME) |
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dB(A) |
dB(A) |
SWL dB(A) |
dB(A) |
dB(A) |
| 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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