Can you explain field tile? Is this a septic type design with a perforated pipe and no catch basin? Of course, you wouldn't want to dump chemicals, but gray water would be fine.
Field tile is generally black perforated 4" (6" and larger are available) and put into a farmers field to aid in the drainage of water. This allows fields to drain faster or for wet areas to drain which normally wouldn't and would be unfarmable. Getting a field dry makes the difference when a farmer can get into a field and work ground/plant crops/ harvest crops.
All my spouting drains into tile that run through the yard and empties into the creek. If I had a shop with no available sewer and had a sink to wash my hands, I'd run a tile about 20' out from the shop. I'd end the tile into a drywell, which is basically a hole full of stone.
For those that fly and don't know. If you look out the window while you're flying (not a super high altitude) and see a green field. If you notice dark green lines in the field, that is where the field tile is running.