For up-gradient interceptor drains, how far must they be set back from the sewage tank?

Up-gradient interceptor drains are designed to manage groundwater and prevent it from infiltrating a sewage tank, helping to maintain the proper function and performance of the septic system. The correct assertion that no setback is required emphasizes the unique operating conditions of interceptor drains — they are positioned to facilitate the drainage of water, rather than to directly receive effluent from the sewage tank. Since these drains function primarily to intercept and redirect groundwater away from the septic tank, the regulations do not mandate a minimum separation distance. Understanding this principle helps to ensure the proper design and installation of septic systems, allowing them to operate efficiently without interference from groundwater conditions.