J Acoustic Report · 132007.2398

                                                                                          ACOUSTICS & AIR QUALITY

7     Rail Noise Assessment

7.1       Overview

Rail traffic noise has been assessed from Sunshine Coast Line (Nambour and Gympie North
railway line) onto the proposed development. The relevant assessment criteria are outlined in
Section 4.2.3.
The rail noise levels have been predicted using the PEN3D computer model validated to onsite
noise measurements and is approved by TMR.


7.2       Data

The following data has been used in the noise calculations:
          Ground contours for the site obtained from the Client onsite survey, field observations,
           and Google Earth Pro.
          It is understood that all residential dwellings will be single storey, and therefore a
           receiver height of 1.8m above the provided pad levels has been used in the noise model.
          The future rail noise levels are assumed to be equal to or lower than the existing rail
           noise levels.
          A +2.5 dBA facade reflection allowance is included in the rail noise level predictions.


7.3       Verification

The results of the rail noise survey carried out at Location A have been used to verify the rail
noise model.
The rail verification model uses the existing ground topography and current rail alignment to
determine the Lmax noise level. Table 7.1 compares the results obtained from the noise survey
with the calculated results from the computer model.


Table 7.1 Existing and Calculated Rail Noise Level

    Receptor Height             Measured Rail Noise Level           Calculated Rail Noise Level
        metres                         Lmax dBA                              Lmax dBA
            1.3m                          75.1                                 75.1


The rail noise model is considered to be verified since the calculated level matches the
measured level.


7.4       Calculations

The rail noise levels have been predicted for all retirement community allotments (refer Figure
3.1 for numbering) and facade of the aged care building (refer Figure 3.2 for numbering). The
predicted single event Lmax noise levels are listed in Table C.1.




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