How close can a proposed house addition be from a septic system?

-       A full foundation must be 10 feet from the septic tank and 20 feet from the leaching area.

-       A slab foundation such as a garage must be 10 feet from the septic tank and 10 feet from the leaching area.

-       Concrete columns for a deck must be 5 feet from the leaching area and not disturb the septic system.