Drainfield has failed but they were told that the system itself was working, this doesnt seem to be the case as there is sewage on their garden. Charlie has attended and looks like the tank has had a modification to the outlet and added a pump box in. There has been some crates installed in the front and cust has been advised that these were to help with the treatment plant. All other houses discharge to the drain at the front but they have been refused. Need to gather enough information and pictures to put a report and quotation together to put forward to the council that it's her only option