I would put it as far away from the kitchen as possible.........so perhaps closer to the door to outside preferable NOT in the kitchen at all
Since this is new construction as for the moon sun and stars!!
There should be a janitorial closet with a tap and drain with a 6 inch wall around it where the bucket gets fill AND emptied
I don't know about MUSTS (that probably depends on your local public health department and or state law) but would be considered the gold standard