i am by far an expert on septic systems, however my contractors are supposed to be digging the footer for my new home today. my septic system is required to have a "perimeter drain" around the entire leach bed. my perimeter drain will make a complete circle around the leach bed to prevent water from standing in the leach bed. this perimeter drain is only to drain off excess water and not SEWAGE. i intend to drain this into my pond if there is enough fall in the ground there, if not i will drain it towards my fathers property. i would definately ask some questions, but if it is the same situation as mine, i don't think it's a problem.