Two rooms with two different standards
The general store holds paper, sports equipment, art supplies and whatever the school has bought in bulk. Dust is the issue, access is occasional and the appropriate response is a periodic clean when the room can be opened up. Nobody eats from those shelves and nothing on them degrades if the interval slips by a fortnight. The right response is a room that is safe to enter, easy to search and clean enough not to mark what is stored in it.
The canteen dry store is a food storage area. Shelving, floor and the surfaces around it need a hygiene-focused method at a frequency that matches how often the room is used, and the equipment used there should not be the equipment used in a general store. Treating both rooms as storage in a single line item collapses that distinction and it is the distinction that matters.
