Sec. 3.5. (a) As used in this chapter, "nonresidential onsite sewage system" means all equipment and devices necessary for proper conduction, collection, storage, treatment, and onsite disposal of sewage from a building other than a single family or two-family dwelling.
(b) The term includes all building sewers, grease traps, septic tanks, dosing tanks, absorption fields, perimeter drains, vault privies, and temporary sewage holding tanks serving one (1) of the following:
(1) An apartment building.
(2) A church or other place of worship.
(3) A commercial establishment.
(4) A condominium.
(5) A medical facility.
(6) A motel.
(7) An office building.
(8) A restaurant.
(9) A school.