BSI British Standards have just published an amended version of BS 6297:2007+A1:2008 Code of practice for the design and installation of drainage fields for use in wastewater treatment

BS 6297 gives recommendations and guidance on the design and installation of drainage fields and infiltration systems for use in wastewater treatment.  BS 6297 is applicable to systems for handling discharges from domestic and commercial sources from single households and upwards.  These sources are typically septic tanks and package treatment plants