MCU16/0079 Appendix F - Environmental Noise Imact Assessment

RS L MECHCANICAL PLANT NOIS E EMIS S IONS AT:

R1: Dwellings Due South                                                               R2: Dwelling Due East across Pelican Street
Commercial A/C units                                                   60 dB(A) 3m    Commercial A/C units                                                   60 dB(A) 3m
Number of units                                                         2 units       Number of units                                                         2 units
Total of units                                                         63 dB(A) 3m    Total of units                                                         63 dB(A) 3m
Distance to dwelling                                                   49 m           Distance to dwelling                                                   75 m
Distance attenuation (-6 dB per doubling of distance)                 -24 dB(A)       Distance attenuation (-6 dB per doubling of distance)                 -28 dB(A)
Roof directivity at plant deck                                         -6 dB(A)       Roof directivity at plant deck                                         -6 dB(A)
Component impact (includes façade reflection)                          35 dB(A)       Component impact (includes façade reflection)                          32 dB(A)
Impact inside with windows open                                        28 dB(A)       Impact inside with windows open                                        24 dB(A)

Basement exhaust fan                                                   66 dB(A) 3m    Basement exhaust fan                                                   66 dB(A) 3m
Number of units                                                         1 units       Number of units                                                         1 units
Total of units                                                         66 dB(A) 3m    Total of units                                                         66 dB(A) 3m
Distance to dwelling                                                   84 m           Distance to dwelling                                                   48 m
Distance attenuation (-6 dB per doubling of distance)                 -29 dB(A)       Distance attenuation (-6 dB per doubling of distance)                 -24 dB(A)
90 degree bend at exhaust side of fan and risers acoustically lined   -14 dB(A)       90 degree bend at exhaust side of fan and risers acoustically lined   -14 dB(A)
Component impact (includes façade reflection)                          26 dB(A)       Component impact (includes façade reflection)                          30 dB(A)
Impact inside with windows open                                        18 dB(A)       Impact inside with windows open                                        23 dB(A)



Combined mechanical plant at façade                                    36 dB(A)       Combined mechanical plant at façade                                   34 dB(A)
Combined mechanical plant inside windows open                          28 dB(A)       Combined mechanical plant inside windows open                         27 dB(A)




R3: Dwelling Due East across River
Commercial A/C units                                                   60 dB(A) 3m
Number of units                                                         2 units
Total of units                                                         63 dB(A) 3m
Distance to dwelling                                                  330 m
Distance attenuation (-6 dB per doubling to river, river 0 dB)        -34 dB(A)
Roof directivity at plant deck                                         -6 dB(A)
Component impact (includes façade reflection)                          26 dB(A)
Impact inside with windows open                                        18 dB(A)

Basement exhaust fan                                                   66 dB(A) 3m
Number of units                                                         1 units
Total of units                                                         66 dB(A) 3m
Distance to dwelling                                                  330 m
Distance attenuation (-6 dB per doubling to river, river 0 dB)        -31 dB(A)
90 degree bend at exhaust side of fan and risers acoustically lined   -14 dB(A)
Component impact (includes façade reflection)                          23 dB(A)
Impact inside with windows open                                        16 dB(A)



Combined mechanical plant at façade                                   28 dB(A)
Combined mechanical plant inside windows open                         20 dB(A)




                                                                            Page 38