This should be an easy traditional find, but maybe not?
I used to work in Kembla Street many years ago and frequented local establishments for technical gear and radio equipment as VK1JDX. This cache has been deliberately placed at this location because it is an "RF Sewer". This means that there is so much radio and electrical interference here (as you will see when you look around GZ), that your mobile phone and GPS may be useless - at least to some degree. The find is an easy traditional mint tin - so how far are you prepared to range to find it? (I used "Waypoint Averaging" on my Montana GPS to get it as accurate as possible.