Home › Forums › RORB – general use › Modelling retarding basins › Reply To: Modelling retarding basins January 17, 2020 at 3:48 PM #1673 daveM85Participant Hi Benson, It looks there was a problem with the previous attachment, I’ve tried to attach a zip file, hopefully it will work. Attachments:You must be logged in to view attached files.