20200903OBA_R1_Loading_Dock_Operational_Conditions · OPW20/0145

5.2 NOISE CALCULATION

Measured noise levels and mechanical plant noise data and operational conditions highlighted in the
previous section have been used to calculate the predicted intrusive noise levels at the sensitive noise
receptors (lots 17, 18, 19, and 21) based on the expected building layouts of the Lots as described below
and indicated in the figures below.

A SoundPLAN™ computer model was developed for these noise sources as described activities and used to
predict noise emissions from the compactor and loading docks to the sensitive receptors (lots 17, 18, 19,
and 21). Predictions were made for the following scenarios:

e Allloading docks and compactor operating concurrently, representing the worst-case scenario
for day time noise emissions.

e All loading docks operating concurrently, representing the worst-case scenario for evening and
night time noise emissions as per the description in Section 5.1;

e Only the compactor operating within the hours nominated and assumed.

e Mechanical plant operational scenarios as described in this report.

The analysis was conducted based on the following assumptions:

e Mechanical plant decks indicated in Figure 2 have a sound power level of 90 dB(A) Leg each.

e Kitchen exhaust fan indicated in Figure 2 has a sound power level of 99dB(A) Lea;

¢ Loading dock trucks have a sound power level of 101 dB(A) Linax.

e Refrigeration trucks were assumed to idle for 15 minutes whilst unloading, with a sound power
level of 95dB(A) Leq at a height of 3m above the ground level. This idling was only assumed to
occur in the loading dock, and not along the boundaries or at the entrance to the loading docks.
The refrigeration trucks, therefore, must not enter the site prior to loading to wait for their turn.
Such restrictions should be included if not yet followed (e.g. signs installed at the entry and
along the boundaries of the shopping centre loading docks).

¢ For all other trucks, no idling was assumed within the sites within short term drop-off/pick-up
occurring at the loading docks only (less than 10minutes) and such restrictions should be
included if not yet followed (e.g. signs installed at the entry and along the boundaries of the
shopping centre loading docks).

¢ Compactor indicated in Figure 2 has a sound power level of 100dB(A) Linax.

e Kitchen exhaust fans being turned off between 10pm and 7am and other plant adjacent and
within loading docks not operational after 10pm and prior to 7am.

¢ Compactor is not operational between 6pm and 7am;

« No trolley collection between 10pm and 7am.

e The presence of a 6m wide plantation buffer between the northern boundary of the residential
lots and the shopping centre paved loading dock and entry boundary.

e Facade line of proposed residential development approximately 8 metres from loading dock
boundary (refer to the closest sensitive receiver buildings used in calculations indicated in figure
below)

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