1. A wastewater stream from a new house or building may be directed to an existing system (remaining from a house or building that was removed or destroyed) only if all of the following are true:
A. The existing system is a permitted system.
B. The existing system is large enough (based on the current septic sizing requirements of IAC Chapter 69) to accommodate the total wastewater load, existing and new.
C. The existing system has been inspected by an IDNR certified time of transfer inspector, and found to be in good condition.
D. An alteration permit has been obtained from EH.
2. A new wastewater stream from a second source (such as a workshop) may be directed to the existing septic system only if all of the following are true:
A. The existing system is a permitted system.
B. The existing system is large enough (based on the septic sizing requirements of IAC Chapter 69 when the system was originally installed) to accommodate the total wastewater load, existing and new.
C. An alteration permit has been obtained from EH.