You get about a 1/3 m out of the pump lines when they clean them through @Adam2, a good idea is to have someplace to put it, shutter up a box for the chicken coup to sit on or make a base for the wheelie bins, I have 3 posts that hold up our carport that sit on concrete pads, so pre dug some very rough holes ready for the overspill.
You need to nominate a washdown area for the pump guy, plastic on the floor with a sheet of ply on top so it’s easy to shovel up the mess.
Its all relatively straight forward with a bit of planning.