Appendix C - Noise Impact Assessment and Noise Managment Plan · 132005.1133.15

Altum Constructions
Environmental Noise Level Impact Assessment of Facilities Building, Including Internal Dining Option,
Parkridge, 75 Resort Drive, Noosa Heads                                                                            Page 13 of 22




   Plant and Equipment and Evening Background Noise Assessment from Rear (Eastern) Boundary of Block 3,
                  Microphone Elevated to be Level with Top Level of Residential Apartments
                                                                                               Noise Level, dB(A)
   Time                                   Description
                                                                                     LAeq,T      LA1,T    LA10,T       LA90,T
2111-2116      Kitchen exhaust fan at 50%                                             39.4       42.8     40.5         38.2
               Ambient sound level, no noise from Utilities Building
2120-2125                                                                             39.0       45.1     41.2         37.5
               audible

From the above results, for the late evening, the background sound level was 38 dB(A) LA90,T, providing
further support for the early night-time (2200 hours to midnight) adopted background sound level of 36
dB(A) LA90,T.

With no Utilities Building plant and equipment audible and the kitchen exhaust fan turned off the
average ambient LAeq,5min noise level was 40.7 dB(A) LAeq,5min.

All noise level measurements were conducted 17 metres from the kitchen exhaust fan of the Utilities
Building, with the microphone elevated 7.5 metres to be equivalent to the upper level residential of
Block 3, which was a further 7 metres distant from the monitoring location. This additional separation
distance would result in a further 3 dB(A) noise level reduction.

With the kitchen exhaust fan at 75% the noise level of the kitchen exhaust fan would be:

     •    46.0 dB(A) (measured level) – 40.7 (ambient noise level without exhaust fan) = 44.5 dB(A) – 3
          (additional separation distance) = 41.5 dB(A) LAeq,T.

This complies with the daytime noise limit but exceeds the evening noise limit by 41.5 – 39 = 2.5 dB(A)
and the night-time (up to midnight) noise limit by 41.5 – 36 = 5.5 dB(A).

With the kitchen exhaust fan at 50% the noise level of the kitchen exhaust fan and ambient noise was
39.4 dB(A) LAeq,T, and without the kitchen exhaust operating the ambient noise only was 39.0 dB(A)
LAeq,T. There is insufficient difference between these two levels to determine kitchen exhaust fan noise
only at 50%, so conservatively the noise level of the kitchen exhaust fan at 50% has been assumed to
be 38 dB(A) LAeq,T (in actuality it could be less than this).

Therefore the noise level of the kitchen exhaust fan at 50% would be:

     •    38 dB(A) (measured level) – 3 (additional separation distance) = 35 dB(A) LAeq,T.

This complies with the daytime, evening and night-time (up to midnight) noise limits.

For just the kitchen exhaust fan the noise limits are complied with provided:

     •    daytime – kitchen exhaust fan set to low (50%) or high (75%);
     •    evening and early night-time – kitchen exhaust fan set to low (50%) only (or turned off).

For all other plant and equipment (refrigeration and air-conditioning) their noise levels comply with the
noise limits for the complete 24-hour day.




David Moore & Associates Pty Ltd                                                  Our reference: R21054/D3422/Rev.0/25.08.21