130814 Acoustic Report 230913 · MCU13/0171

Cooroy Property Trust Pty Ltd c/- Lavin Trading
Environmental Noise Level Study for Proposed Wimmers Soft Drink Manufacturing Facility,
271 Lake Macdonald Drive, Lake Macdonald                                                                     Page 8 of 32




In addition to the above, in accordance with the procedure defined by the Department of Environment
                                th
and Heritage Protection, the 10 percentile background noise level was also calculated, as follows:

         o    daytime:    35.2, 35.0, 34.7, 33.6, 35.8, 36.3, 34.0, 34.2                  Average = 34.9 dB(A)
         o    evening:    33.4, 34.0, 33.5, 32.3, 29.0, 29.8, 42.1, 40.1                  Average = 34.3 dB(A)
         o    night-time: 24.5, 24.0, 23.8, 24.6, 26.2, 32.6, 26.5, 26.0                  Average = 26.0 dB(A)


SOURCE NOISE LEVELS

From previous noise level measurements conducted by the consultant, source noise levels relevant to
the soft drink manufacturing facility are as follows:

Time varying noise sources
• semi trailer driving on site:                 70 dB(A) LA10,adj,T and 72 dB(A) LAmax,T @ 8 m;
• truck door closing:                           58 dB(A) LA10,adj,T and 60 dB(A) LAmax,T @ 30 m;
• truck engine starting:                        58 dB(A) LA10,adj,T and 60 dB(A) LAmax,T @ 30 m;
• truck air brakes:                             80 dB(A) LA10,adj,T and 80 dB(A) LAmax,T @ 8 m;
• people talking:                               60 dB(A) LA10,adj,T and 62 dB(A) LAmax,T @ 10 m;
• car driving on site:                          50 dB(A) LA10,adj,T and 55 dB(A) LAmax,T @ 8 m;
• car door closing:                             52 dB(A) LA10,adj,T and 55 dB(A) LAmax,T @ 30 m;
• car engine starting:                          52 dB(A) LA10,adj,T and 55 dB(A) LAmax,T @ 30 m;
• forklift operating:                           78 dB(A) LA10,adj,T and 80 dB(A) LAmax,T @ 10 m;
• waste collection vehicle:                     73 dB(A) LA10,adj,T and 73 dB(A) LAmax,T @ 10 m;

steady state noise sources
• office airconditioning unit:                  82 dB(A) SWL;
• cooling tower:                                80 dB(A) LA10,adj,T @ 1 m;
• exhaust fans:                                 65 dB(A) LA10,adj,T @ 1 m;
• pumps:                                        70 dB(A) LA10,adj,T @ 1 m.

Inside the building the noise of soft drink manufacturing will be approximately 85 to 90 dB(A) LA10,adj,T
and 88 to 92 dB(A) LAmax,T @ 1 m, with this noise being reduced from inside to outside the factory
building via open doorways and external factory walls.


NOISE LEVEL IMPACT

The closest residences to the proposed soft drink manufacturing facility, relative to the actual
manufacturing area, are:

•   approximately 350 metres to the north, on the western side of Lake Macdonald Drive;
•   approximately 220 metres to the east on the eastern side of Lake Macdonald Drive;
•   approximately 230 metres to the south-east on the southern side of Lake Macdonald Drive; and
•   approximately 350 metres to the south, on the western side of Lake Macdonald Drive.

The time-varying noise source limits for the daytime and evening are that the adjusted source noise and
ambient noise combined should not exceed the ambient noise by more than 3 dB(A), for like
parameters. The most appropriate parameter is the LA10,T.

Therefore, the noise limits for time-varying noise at the closest residences will be:

•   daytime:    54 + 3 = 57 dB(A) LA10,adj,T
•   evening:    49 + 3 = 52 dB(A) LA10,adj,T
•   night-time: 45 dB(A) LAmax,T inside the bedroom of the closest residences, which is equivalent to 55
                dB(A) outside these closest residences with external openings representing 10% of the
                external surface area of the bedroom open.



David Moore & Associates Pty Ltd                                               Our reference: R13095/D2847/Rev.0/23.09.13