I'm trying to obtain discharge consent from the EA. I originally applied for a septic tank and filter to discharge to a watercourse. They told me the run on the watercourse wasn't enough to allow this. My percolation tests failed (300 sec/mm when it needs to be under 140 sec/mm) also so soak aways won't work either. I'm after a solution that doesn't involve excess maintenance and associated ongoing costs (which I believe will be required with treatment plants what with electric motors and moving parts). Does anybody have any solutions to this conundrum? For instance with enough filters can a septic tank arrangement be used to discharge into a slow running watercourse/ditch. Any advice would be appreciated.