When I worked in construction and railway construction the only food allowed on the premises were our lunchboxes and even those were stored away from the actual construction site.Why would they ship food before the vault is complete? Those crates would just be in the way of the construction. I mean if i build a house irl then the last thing im going to bring is furniture and food. Go to building sites and see just how many of them has a bunch of crates of food just lying around.
No one in their perfect mind would bring boxes of food into a construction site.