Attach H- Acoustic report

4.2 Assessment of Predictions

Predicted vehicle LAeq noise levels are presented in Table 4.4 and Table 4.5. The restriction of
deliveries to the daytime only produces residual exceedances of 4 dB during the daytime at S6
(Cooroy Hotel) and 1 dB during the nighttime at locations S3 to S5 (residences).

The Cooroy Hotel (S6) is exposed to existing daytime noise from public roads in the order of 57 dB(A)
LAeq (based on Location N1). Given the predicted noise levels from vehicles on site are 7 dB less than
the existing levels LAeq levels at S6, the residual exceedance of 4 dB during the daytime is not
considered significant.

It is noted that during the nighttime at location S3 to S5 the predictions for vehicles and mechanical
plant when considered individually meet the nominated criterion. It is noted that the predictions of
vehicle noise during the nighttime are for the period 6:00 am to 7:00 am which would coincide with
a higher background (average LA90 of 40 dB(A)) than that considered for the entire nighttime period.
Given the higher background during 6:00 am to 7:00 am the residual exceedance of 1 dB for
combined mechanical plant and vehicle noise is not considered significant.

Mechanical plant is predicted to meet the nominated criteria (see Table 4.5). However, additional
analysis during the detailed design phase of the final plant selection should be conducted to ensure
limits are met.

Predicted LAmax noise levels are presented in Table 4.6. The noise assessment has considered sleep
disturbance criteria, and as the surrounding sensitive receivers are already exposed to traffic noise, a
comparison is also made against the existing LAmax noise levels.

Predicted noise levels from patron vehicles (cars) meet the sleep disturbance criteria as presented in
Table 4.6 as the predicted levels from the site are below those already received from traffic on
public roads.

The following recommendations are made:

         Deliveries and refuse collection should be during the daytime only (7:00 am to 6:00 pm).
         Grates in trafficked areas should be dampened (e.g. rubber inserts) to limit reaction.
         Mechanical plant for the purposes of assessment was assumed to determine a benchmark as
          the mechanical plant for the proposed development is yet to be selected. It is proposed that
          during the detailed stages of the project, an assessment of the mechanical plant noise
          emissions from the site be conducted using the actual plant model selections and
          installation arrangements be made to ensure that the nominated limits are met. Therefore
          noise limits are proposed to inform the selection of mechanical plant for the development.
          Table 4.5 presents noise limits to be met at the nearest existing sensitive receivers to the
          proposed development.




0101-R1-01 VerveBD Garnet Street, Cooroy Noise Report.docx                                             13
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