Noise and Air Quality Impact Assessment W D Milligan 31 July 2014

                                                                       MWA Environmental




2.2 REVELANT NOISE CRITERIA

Part 4 Section 10 of the Environmental Protection (Noise) Policy (2008) provides
‘controlling background creep’ noise criteria for the assessment of amenity impacts
for an activity involving noise. Considering the nature of noise emissions from a
poultry farm the ‘controlling background creep’ criteria specified for ‘noise that varies
over time’ and for ‘noise that is continuous’ are both relevant, as follows:

   10 Controlling background creep
       (1) This section states the management intent for an activity involving noise.
           Note—
           See section 51 of the Environmental Protection Regulation 2008.
       (2) To the extent that it is reasonable to do so, noise from an activity must not be—
            (a) for noise that is continuous noise measured by LA90,T—more than nil
                dB(A) greater than the existing acoustic environment measured by LA90,T;
                or
            (b) for noise that varies over time measured by LAeq,adj,T - more than 5dB(A)
                greater than the existing acoustic environment measured by LA90,T.



As such, the adopted noise criteria for the assessment of impacts from the proposed
development are that:

   •   Noise from ventilation fans which operate continuously for extended periods
       throughout the batch cycle, measured as the LA90,T, does not exceed the
       existing LA90 (background) noise; and
   •   Noise from catch-out and feed deliveries (including vehicle movements,
       forklifts, feed transfer blowers) which operate intermittently for limited periods,
       measured as the LAeq,T, does not exceed the existing LA90 (background) noise
       by more than 5 dB(A).


As a conservative methodology for determining the design noise limits for the
proposed development, the adopted Environmental Protection (Noise) Policy (2008)
‘controlling background creep’ noise criteria have been assessed based upon the
Rating Background Levels (RBLs) determined in accordance with Planning for Noise
Control guideline (refer Section 2.1).




Ridgewood 12-002                            6                                  31 July 2014