S.C. Code Ann. § 48-1-120

If the Department shall determine that an undesirable level exists, it shall take such action as necessary to control such condition. The Department shall grant such time as is reasonable for the owner or operator of a source to correct the undesirable level, after taking all factors into consideration that are pertinent to the issue. In making its order and determinations, the Department shall take into consideration all the facts and circumstances bearing upon the reasonableness of the emissions involved including, but not limited to: (a) The character and degree of injury to, or interference with, the health and physical property of the people; (b) The social and economic value of the source of the undesirable levels; (c) The question of priority of location in the area involved; and (d) The technical practicability and economic reasonableness of reducing or eliminating the emissions resulting from such source. If the undesirable level is not corrected within the required time, then the Department shall issue an order to cease and desist from causing such emissions.