Approved Noise Impact Assement Document OPW20-0108 2 of 2

            6. NOISE ASSESSMENT
            Operation of the proposed service station redevelopment has the potential to generate noise emissions due to:

                 •   Car movements on site.

                 •   Mechanical plant operating.

                 •   Pump bowser

                 •   Truck refuel / garbage truck

            The results of the noise measurements and additional noise data from Alpha Acoustics Pty Ltd and SoundPlan
            Sound Library are presented in Table 6.1 below as sound power levels.

            Table 6.1: Summary of common noise emissions at the subject site




            Knowing the source sound power level (see above Table 6.1), the sound pressure level can be calculated at a
            remote location using suitable formulae to account for distance losses, ground absorption, sound barriers,
            atmospheric effects, etc.

            Noise modelling has been conducted using SoundPLAN v7.0 and the prediction methodology ISO 9613-2:
            1996 incorporating manufacturer published sound emission data. We would expect the order of uncertainty to
            be in the range of +/- 2 dB(A). The noise model presents all plant operating simultaneously, accordingly the
            predictions should be considered a worst case scenario, assuming constant noise levels.

            Noise modelling results are presented in Appendix C of this report. Additionally LAeq Noise emissions
            modelled in the day / evening period and night for first floor and ground floor after noise controls have been
            incorporated are shown in the following figures:




        © Alpha Acoustics Pty Ltd                                                              Page 14 of 25
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