080620 FINAL PN 2896 eReport June 08 V1.pdf [As Published] · 132008.1128

                                                                    SUNRISE BEACH RETIREMENT VILLAGE
                                                                      GRASSTREE COURT, SUNRISE BEACH
                                                                             NOISE IMPACT ASSESSMENT

         Under this criteria noise from the surrounding land uses must not regularly exceed a LAmax . Adj
         level of 45dB(A) inside a bedroom or sleeping area. From experience, including site
         measurements, it is reasonable to apply an eight dB attenuation across (through) a façade
         including open windows. Therefore the appropriate external criterion at the façade is 53
         dB(A).

                             Table 8 :Day and night time noise limits
           Period                           Measured Average LAmax              Noise Limit at Façade
                                                      dB(A)                         LAmax dB(A)
           Day time 7am - 10pm                         62                                65
           Night time 10pm – 7am                       N/A                               53


6.2      Service lane access

         Vehicles travelling internally in the development have the potential to affect the rear of
         dwellings located along Ben Lexcen and Columbia Drives: Lots 763 to 770 MCH805764. Table
         9 sets out the predicted car noise levels for the service lane to the affected lots. A 5m setback
         from the boundary has been assumed for the dwellings on the affected lots and a 5m
         separation to the passing vehicle.

               Table 9: Predicted car park noise impacts at eastern boundary dwellings
            Source Noise at 10 m       Noise Level       Noise Level        Complies With Noise
                                      dB(A) @ 10m     dB(A) at Façade              Limits
                Car pass by          61 dB(A) LAmax    61 dB(A) LAmax          Day time only


         It can be seen that the car pass by exceed the night time noise limit by up to 4 dB. Traffic
         down the service lane is expected to be minimal given the expected occupant mix of the units.
         However to ensure unrestricted compliance a 1.8m acoustic barrier fence is recommended
         along the eastern boundary.

6.3      Outdoor dining

         The Central Facilities Building incorporates a Bar/Café/function room area. The café area will
         operate from 7am to 6pm, seven days. Outside these times the area may be used for
         functions up to 12 midnight. It is expected that the café function will provide outdoor dining
         and that any amplified entertainment employed will be at background levels only and will
         not be provided for the outdoor area. The potentially most noise affected space is the closest
         residential unit on Grass Tree Court, 40m from the edge of the terrace. The Residential Aged
         Care building on the opposite side of Grass Tree Court is not considered noise affected. The
         expected levels of noise from outdoor dining are presented in Table 10

                 Table 10: Dining Noise Source Levels
                  Source         Source Sound Power Level           Expected     impact   on       closest
                                  LW, dB(A)                         building, dB(A) LAmax
           Restaurant dining                  80                                     43
           Modest conversation                85                                     48




PN 2896 Report June 08 V1.doc| 20 June 2008                                                     7 of 8