Attachment 1 - Acoustic Report GSL Church Conditions

   Table 4 Friendship Terrace Noise Levels dB(A)



                                Source Noise       Level at Nearest           Day             Short Evening
            Source
                                   Level             Residence            7am – 6pm             6pm – 9pm




    Morning Tea, ~30 people     68dB(A) @ 5m           53dB(A)

                                                                        Ambient criteria      Ambient criteria
                                                                          53dB(A)               46dB(A)

                                60 dB(A) @ 5m          45dB(A)
    Morning Tea, ~16 people




    Morning Tea, ~30 people     68dB(A) @ 5m        46dB(A) Day Av

                                                  47dB(A) Evening Av    Draft Condition       Draft Condition
                                                                        criteria 48dB(A)      criteria 43dB(A)


    Morning Tea, ~16 people     60 dB(A) @ 5m       38dB(A) Day Av

                                                  39dB(A) Evening Av



   From Table 4 it can be seen that for larger groups the noise levels would meet the Day time criteria and
   exceed the Evening criteria by 4-7dB(A). For smaller groups the levels will meet the proposed Day time and
   Evening criteria. Based on the expected infrequent use of the terrace during the evening (eg. currently no
   evening church services), it is expected the occasional evening use would have minimal impact. Limiting the
   hours of use until 9pm further reduces the potential noise impact. To reduce radiation of sound from the
   Friendship Terrace, the following acoustic treatments are proposed:
   Noise Control Measures –

          The ceiling construction will include acoustic absorption panels to reduce the buildup of reverberant
           noise;
          The roof will be raked to reflect sound back towards the church rather than projecting it towards the
           residential boundary.

Acoustics Noise Vibration                               10                           0145 GSL Church Conditions Rpt 02