Only after departures.
Except Rwy 27 in Melbourne where..........
.....in the event Rwy 09/27 is
used for landing or take-off, a full
length inspection of Rwy 09/27 must
be conducted by the Senior Airside
Safety Officer (Car 2). This may also
include a sweep/clean of Rwy 09/27
prior to the next aircraft arrival or
departure.
I believe this is due to 27 being a 45m wide runway