Response to Information Request 5-7 Rufous Street Peregian Beach - Attachment D MCU13/0092

           The existing ambient results include values for the LA011, LA102,              LAeq3, LAmax4 and LA90S averages for
           each of the day, evening and night periods.

                               Table 1: Existing ambient noise levels for Logger 1 (Free-Field)

                                                                    Average6 Noise Levels
                       Time of Day             L,.Ol         LAi0           LA90             LAeq             LAmax
                  :



                                              (dBA)         (dBA)          (dBA)            (dBA)            (dBA)

                      Day (7am-6pm)             62            57            48                55               69

                Evening (6pm-10pm)              59            55            48                53               65

                  Night (10pm-7am)              56            52            47                52               62



                            Table 2: Existing ambient noise levels for Logger 2 (Free-Field)

                                                                    Average Noise Levels
                       Time of Day             L,.Ol         LAi0           LA90             LAeq             LAmaX’

                                              (dBA)         (dBA)          (dBA)            (dBA)            (dBA)

                      Day (7am-6pm)             72            69            52                65               78

                Evening (6pm-10pm)              70            64            45                60               75

                  Night (lOpm-7am)              67            56            45                58               74




           From observations made during separate site visits in the day-time, the noise levels at the logger

           locations were influenced by:

                .      Surf noise from Peregian Beach (dominant noise source during the day time and evening

                      time);
                .      Domestic noise from the         surrounding residences, traffic noise and commercial activity
                      noise in the area; and

                .     Occasional light aircraft flyovers.




 Based on the noise logger results in Figure 7 to Figure 12 and analysis of the data, it was concluded that
background noise was mostly dominated by surf noise. There were instances during the logging when surf
                                   noise levels were lower. It can be seen in Table 1 and

           Table 2 that the lowest        background levels measured between                the two measurement locations

           were   48dBA during the day, 4SdBA in the evening and 4SdBA at night. These levels included a

           component of surf noise and using these values                 as   design parameters for future plant and

           equipment may result          in   noise    issues at the    residences. In this instance,            a     slightly    lower

           background level than measured is recommended (SdBA less).




           The recommended noise level (LA90) for future plant would be:-




t
    LAOt is the A-weighted sound pressure level exceeded for 1% of the time.
2
    LAtO is the A-weighted sound pressure level exceeded for 10% of the time.
3
  LAeq is the equivalent or energy-averaged A-weighted sound pressure level.
4
  ~m.x is the average of the maximum A-weighted sound pressure levels occurring within the consecutive 15 minute
  samples.
5
  LA90 is the A-weighted sound pressure level exceeded for 90% of the time.
6
  Averages are presented as the arithmetic means of the measured parameters over consecutive 15 minute intervals
  throughout each period of the day, evening and night, apart from LAeq data which is calculated as a logarithmic
    average and   ~90, which is the average of the data set below the median in accordance with instructions from the
    QLD EPA.
@ Renzo Tonin Ron Rumble                                                           Proposed Shopping Centre, Rufous Street, Peregian
                                                                                                            Noise Impact Assessment

Q9554-01F02 (Rev 3) Peregian Shopping Centre.doc                                                    Multi Span Australia Group pty Ltd

5 August 2013                                                                                                                     Page 10