J Acoustic Report · 132007.2398

                                                                                       ACOUSTICS & AIR QUALITY

Table 5.5 Average of Top 15 Maximum Noise Levels at Location A

                     Day                            Average of Top 15 Maximum Noise Levels
                                                                   Lmax dBA
              Day 1: 12/11/14                                         75.7
              Day 2: 13/11/14                                         74.6
              Day 3: 14/11/14                                         74.9
              Day 4: 15/11/14                                         74.6
              Day 5: 16/11/14                                         75.1
              Day 6: 17/11/14                                         75.8
              Day 7: 18/11/14                                         75.9
                Median Day                                            75.1



To check the validity of the above approach, ASK reviewed the noise level and audio data
associated with the maximum noise events on Day 1. It was determined that the average of the
noisiest 15 rail noise events was marginally lower than the average of the noisiest 15 overall
noise events, at 74.4 dBA Lmax versus 75.7 dBA shown in Table 5.5. Thus the approach used
in Table 5.5 is considered conservative as it is likely to marginally over predict the rail noise
exposure.
From the results in Figure 5.1, Table 5.2 to Table 5.5 and the observations noted from attended
measurements in Section 5.1 the following comments are made:
      Road traffic is the consistent source of noise at this location.
      Rail noise in inconsistent in comparison to traffic noise, however L max levels will be
       dominant
      Noise sources are Elm Road/Cooroy Connection Road, and Rail line adjacent to road.


Based on the measured background noise levels the outdoor road traffic noise limits are as
follows:
      For the external facade of buildings L10(18 hour) 60 dBA including façade reflection.
      For outdoor recreation areas L10(18 hour) 57 dBA free field.




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