MCU14/0056 Acoustic report Att H - Information response

3 Existing Noise Environment
MRG conducted noise measurements to establish the existing ambient noise environment. Noise
measurements were conducted at Location N1, N2 and N3 located on the northwestern,
northeastern and northern portions of the site respectively, as presented on Figure 1.1.
Measurements were conducted from Saturday 15 to Wednesday 19 March 2014 with Larson Davies
LD831 sound level meters. The noise loggers were field calibrated with no significant drift noted
during the measurement period. Audio snap shots were recorded at the commencement of each
monitoring interval. Dominant noise source was road traffic noise with occasional wildlife noise.

Weather observations were measured at W1, as presented on Figure 1.1. With the exception of a
single hour (16/03/2014 17:00 - 3.35 m/s), inclement weather was not noted during the monitoring
period as wind speeds were below of 3 m/s and no rainfall was recorded.

A summary of unattended and attended measurements are presented in Table 3.1, Table 3.2 and
Table 3.3 for monitoring Location N1, N2 and N3 respectively. Table 3.4 summarises measured
background noise levels at Location N1, N2 and N3. Plots of LA1, LA10, LAeq and LA90 are presented in
Figure 3.1, Figure 3.2, and Figure 3.3 for N1, N2 and N3 respectively.

The 1/3 octave data from the measurement period for LA10 and LAeq are presented in:

          Figure 3.4 and Figure 3.5 respectively for Location N1.
          Figure 3.6 and Figure 3.7 respectively for Location N2.

The following time periods are considered:
          Daytime is taken to be 7:00 am to 6:00 pm (Road Traffic Noise 6:00 am to 6:00 pm).
          Evening is taken to be 6:00 pm to 10:00 pm
          Nighttime is the remaining hours of the day being 10:00 pm to 7:00 am (Road Traffic Noise
           10:00 pm to 6:00 am).

                      Table 3.1: Summary of Unattended Noise Measurements at Location N1
                                                                                             LA90 Minimum*
    Date             LA10(18 h)           LA90(8 h)          LA90(18 h)
                                                                                 Daytime      Evening        Nighttime
 17/03/2014             65.6                36.7                51.7
 18/03/2014             65.4                37.2                51.6                50.1        43.3           30.1
  Average               65.5                37.0                51.6
Note: LA90 Minimum is taken to be the median of the measured L A90 minimum in each period.


                      Table 3.2: Summary of Unattended Noise Measurements at Location N2
                                                                                             LA90 Minimum*
    Date             LA10(18 h)           LA90(8 h)          LA90(18 h)
                                                                                 Daytime       Evening       Nighttime
 17/03/2014             56.8                37.2                46.9
 18/03/2014             56.5                36.1                46.8                47.4        40.4           32.1
  Average               56.6                36.6                46.9
Note: LA90 Minimum is taken to be the median of the measured L A90 minimum in each period.


            Table 3.3: Summary of Unattended Noise Measurements at Location N3 - 15 to 19/03/14

0009-R2-01 VerveBD Mixed Use Cooroy Noise Report.docx                                                                    7
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