Appendix 4.16
Assumed Operation Equipment for Pumping Station P1a (With the Use of Silencer)
Powered Mechanical Equipment Reference No. Items SWL/Item Screening* Sub-total Total SWL Total SWL
(PME)     dB(A) dB(A) SWL dB(A) dB(A) dB(A)
Submersible water pump CNP 283 1 85 10 75    
Deodouriser1 R1 1 79 8 71 76.5 76.46
Note:
*      Assume 10 dB(A) noise reduction for equipment placing in enclosure/ 8 dB(A) reduction for the use of  silencer
1   Estimated SWLs of the equipment obtained from contractors
1      Based on fan with 1700m3/hr flowrate
R1   Good Practices on Ventilation System Noise Control (EPD)