We have built a new cattle building and want to put the silage clamp adjacent, using the mass concrete wall of the new building as one of the walls for the pit. However, doing this we would not be able to have a drain on the outside of this wall, as this would be in the cattle building. Has anyone managed to get the EA to agree to not having to have a drain in this scenario? We would have drains on the other walls of the clamp.