Environmental Noise Report · MCU13/0064

2 Existing Noise Environment
MRG conducted noise measurements to establish the existing ambient noise environment. Noise
measurements were conducted at Location N1 at 37 Tait Street, Tewantin as presented on Figure
1.1. Measurements were conducted from Friday 14 to Tuesday 18 June 2013 with a Larson Davies
LD831. The noise logger was field calibrated with no significant drift noted during the measurement
period.

Weather observations were taken from the nearest Bureau of Meteorology (BOM) station being
Tewantin RSL Park (Station Ref: 040908). No rainfall was measured during the monitoring period.

A summary of unattended measurements for ambient and background noise levels are presented in
Table 2.1 and Table 2.2 respectively. The background noise levels were calculated using the lowest
10th percentile of measured LA90 noise levels within each period. A plot of LA1, LA10, LAeq and LA90 is
presented in Figure 2.1. Noise sources in the vicinity of the measurement site included birds,
insects, distant road and river traffic.

The following periods are defined:

         Daytime 7:00 am to 6:00 pm
         Evening 6:00 pm to 10:00 pm
         Nighttime 10:00 pm to 7:00 am

      Table 2.1: Summary of Unattended Noise Measurements at Location N1 – Ambient Noise Levels
                                                           Measured Noise Level (dB(A)
     Descriptor              Period
                                                Minimum            Maximum              Average
                             Daytime (7am-6pm)                   37.9   61.8                 50.7
         LA1                 Evening (6pm-10pm)                  30.4   57.6                 40.5
                            Nighttime (10pm-7am)                 26.6   62.5                 36.4
                             Daytime (7am-6pm)                   34.1   56.0                 43.5
         LA10                Evening (6pm-10pm)                  28.9   50.2                 36.0
                            Nighttime (10pm-7am)                 24.1   50.5                 31.2
                             Daytime (7am-6pm)                   28.0   44.2                 34.1
         LA90                Evening (6pm-10pm)                  26.1   37.2                 29.8
                            Nighttime (10pm-7am)                 22.0   36.7                 26.4
                             Daytime (7am-6pm)                   33.0   52.2                 43.0
         LAeq                Evening (6pm-10pm)                  27.6   45.2                 35.7
                            Nighttime (10pm-7am)                 23.3   49.0                 36.6




0023-R1-01 KHA Makepeace Island Noise Impact Assessment Report                                            4
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