now that is very odd to only get a week much less a month out of a tire, i have customers that have been running the same tires for months or even years in freezer applications.
there has to be some rather extenuating circumstances to eat a tire up in a month or less.
how cold is this freezer? (not that it matters because the customers i speak of are running in subzero temps)

even if freezer is in negative (below freezing) temps the tires should be lasting alot longer.

there must be some key element your missing here causing this problem
dock plate issues (running over the edge going in and out of trucks?) something to this effect? has dockplates or floors been modified to gain traction is some way?
i would say ice cutting them but if the guy is doing his job there would be no ice large enough to cut

if they are chunking then something must be cutting them deep enough to allow this