(Door alarm buzzing)
(Machines whirring, conversation)
(Machines whirring)
(Vehicle passing)
(Distant machines whirring)
(Machines whirring)
(Wind whistling, machines whirring)
(Indistinct conversation)
(Machines whirring, occasional beeping)
(Indistinct conversation, buzzing)
(Buzzing and conversation stops)
(Machines whirring, occasional beeping)
(Distant machines whirring)
(Machines whirring, occasional beeping)
(Door buzzing, wind whistling)