Section 32-21-5.2-5 - "Residential onsite sewage system"(a) As used in this chapter, "residential onsite sewage system" means all equipment and devices necessary for proper conduction, collection, storage, treatment, and onsite disposal of sewage from:(1) a one (1) or two (2) family dwelling;(2) a residential outbuilding; or(3) two (2) single family dwellings located on the same property with a combined design daily flow of less than or equal to seven hundred fifty (750) gallons per day.(b) The term includes residential sewers, septic tanks, soil absorption systems, temporary sewage holding tanks, and sanitary vault privies.(c) The term does not include a nonresidential onsite sewage system, as defined in IC 16-18-2-253.2.Added by P.L. 157-2024,SEC. 5, eff. 7/1/2024.