I'm in a walkin cooler earlier today. Just finished fixing a freon leak. Now, I'm cleaning the dust and grease off of the back of the evaporator. Below the evaporator is a plastic bin, containing water, cleaning chemicals, and dust and grease.
Customer looks at the dirty water and asks "Is that freon?"
Incidentally, the distributor tubes from the TXV come into the bottom of the evaporator coil. The suction line is at the top corner. I suspect that whoever built this thing needed some more education and practice. Cant make gas tight fittings, and can't get an evaporator right side up.