Attachment 5 - Environmental Noise Assessment

5 Noise Impact Assessment
The noise level predictions for the car wash assume the following:
    ➢ All wash bays, both automatic and manual, along with the vacuum bays and dog wash bays
      are operating simultaneously to represent a worst case scenario, the model also assumes
      that there are four vehicles travelling around the site or waiting for the wash bays;
    ➢ The proposed automatic car wash bays will be fitted with automatic doors on the exit
      equivalent to a PVC clear 2.5 mm door blade (which provides a minimum Rw 23);
    ➢ The predictions include a roof over the entry to the autowash bays as shown in Figures 1.2
      and 1.3;
    ➢ The percentage breakdown contained in Table 1.1 has been used to determine the impact of
      the site during the day, evening and night time periods;
    ➢ Based on the sound power data provided, the noise associated with the automatic car wash
      has no tonal, impulsive or modulating characteristics therefore no penalty adjustment is
      applicable;
    ➢ A +2dB tonality adjustment has been applied for the predicted vacuum noise levels;
    ➢ The plant room roof is to be lined with 50mm 32kg/m3 sound absorbing insulation;
    ➢ Three-phase vacuums will be used on the site; and
    ➢ Mechanical plant for the take-away coffee running constantly during the day time and
      evening periods with a +2dB tonality adjustment applied to the predictions.
Table 5.1 presents the predicted daytime and evening noise levels associated with both automatic
car wash bays, all hand wash bays and vacuum bays and compares the results to the criteria from
EPP (Noise). Please note that predictions include the noise attenuation requirements discussed in
Section 6 of this report. Figure 5.1 presents the noise contours for the proposed carwash based on
all sources operating for the daytime scenario.

   Table 5.1: Predicted Noise from Proposed Carwash Site During Day, Evening & 5am to 7am Time
                                              Periods

                                                     Complies with Day                                   Complies with
                                                       Noise Limit of              Predicted            Evening Limit of
                           Predicted Variable
Address of Reciever (ref                             LAeq adj 1 hour 52dB(A)   Variable Evening        44dB(A) LAeq adj 1 hour
                             Daytime Level,
      Figure 1.1)                                       (and daytime             Noise Level,           and Background
                            LAeq adj 1 hour dB(A)
                                                    background creep of        LAeq adj 1 hour dB(A)     Creep Limit of
                                                            47dB(A)                                    39dB(A) LAeq adj 1 hour

8 Opal Street                       45                    Complies                      38                   Complies

10 Opal Street                      44                    Complies                      36                   Complies

12 Opal Strteet                     37                    Complies                      36                   Complies

11 Diamond Street                   36                    Complies                      30                   Complies

12 Diamond Street                   42                    Complies                      36                   Complies



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