MCU10/2083 Information Request Response 37 Gibson Rd Noosaville

Proposed Commercial Development
37 Gibson Street Noosaville
ENVIRONMENTAL NOISE IMPACT ASSESSMENT
26906 R09 37 Gibson Rd Noosaville ENV
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Q TTM Consulting Pty Ltd 2010




7. ANALYSIS
7.1. Source Noise Levels
Table 4 shows the source levels that form the basis of the noise predictions.

                                                Table 4: Source noise levels

                                             Measured Level                  Correction          Corrected Level
   Noise Source
                                            dB(A) LAmax at I m             Factor dB(A) *         LAmax d6 A
   Car door closure                                77                      + 2 (impulsive)             79
   Car starting                                    79                      + 2 (impulsive)             81
   Car bypass     5 km/h                           78                            N/A                   78
   Goods Delivery                                  85                            N/A                   85
   Waste collection                                92                      + 2 (impulsive)             94
   Conversation                                    75                            N/A                   75
                                                   77                      + 2 (impulsive)             79
 *Correction due to tonality and impulsiveness as per AS1055:1997.


7.2. Predicted Noise levels
The source levels from Table 4 are used to determine the noise predictions at the nearest
affected receivers. The following corrections were applied in calculating the predicted noise
impacts:

      •     Distance correction at -6dB per doubling of distance from the source
      (i.e. 20 x Log(source distance m /receiver distance m).
      • Most likely source locations were determined from the proposed site plan (i.e. car spaces,
      etc).
      • Barrier reductions were determined with a path difference calculation.                          2.8m was the
      assumed height of the proposed building.

Point source calculations are displayed in Appendix C.

                          Table 5: Predicted noise impact levels from onsite activities to Receiver I

                                                         Predicted Level           Assessment Criteria
                                                           dB(A) LAmax              Complies Yes/No
                            Noise Source
                                                                                    Day            Evening
                                                              Facade
                                                                                  60dB(A)          54dB(A)
           Car Door Closure                                      47                Yes               Yes
           Car Passby                                            49                Yes               Yes
           Car Start                                             47                Yes               Yes
           Delivery                                              53                Yes               Yes
           Waste collection                                      62              +2 dB(A)          +8 dB(A)
           Conversation (front of shops)                         44                 Yes                 Yes
           Conversation (behind shops)                           44                 Yes                 Yes
           Conversation (tenancy 1 deck)                         35                 Yes                 Yes
           Conversation (tenancy 8 deck)                         44                 Yes                 Yes
           Small bin lid closure                                 38                 Yes                 Yes



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