If the use of a dwelling or facility is changed such that additions or alterations are proposed which increase wastewater flow, change wastewater characteristics, or compromise the integrity or function of the system, the onsite wastewater system shall be brought into full compliance with this regulation. Alterations that change the wastewater characteristics or increase wastewater flow will require the owner to apply for and receive an approval for the upgrade/expansion prior to any alterations.
S.C. Code Regs. § 61-56.304