Product works well with United Site Services portable restrooms.
It meets SWPPP requirements of a containment tray. Perfect size for the units and allows them to sit at the correct height. The front lip does not interfere with door access. That was concerning to me as I could not locate the specific dimensions online.

Overall the piece is very very rigid/solid. I tried to pick up all 6 at once and it was too heavy for a single person to drag around. Can easily move two so that should provide you with information on how thick/strong the plastic is.

Rating: [5 of 5 Stars!]