Environmental Noise Level Impact Assessment of Facilities Building · 132005.1133.13

Altum Constructions
Environmental Noise Level Impact Assessment of Facilities Building, Parkridge, 75 Resort Drive, Noosa Heads   Page 9 of 16



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 a
conservative 35 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 and evening noise limits but exceeds the night-time (up to midnight)
noise limit by 41.5 – 38 = 3.5 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 39.4 dB(A) LAeq,T (in actuality it would be less than this).

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

        39.4 dB(A) (measured level) – 3 (additional separation distance) = 36.4 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 and evening – kitchen exhaust fan set to low (50%) or high (75%);
        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.


GYMNASIUM

There is potential for noise from within the gymnasium to impact the closest residential Block, in
particular Blocks 3 and 4. The gymnasium is fully air-conditioned and it has been assumed that it will
only be ever operated with all external openings closed.

From a previous noise assessment conducted inside a gymnasium for a 48-hour period the noise levels
were:

        average up to 72 dB(A) LAeq,15min;
        maximum up to 88 dB(A).

The noise limits for noise from the gymnasium, at the closest residential, is:

   daytime (0700 to 1800 hours):                          50 dB(A) LAeq,adj,T;
   evening (1800m to 2200 hours):                         45 dB(A) LAe,adj,T;
   night-time (2200 hours to midnight):                   40 dB(A) LAeq,adj,T.




David Moore & Associates Pty Ltd                                                Our reference: R19083/D3422/Rev.2/18.12.19