S.C. Code Ann. § 5-31-840

Any such sewerage commission shall have the construction of the sewerage system in charge and, subject to the approval of the city or town council, shall advertise for bids for at least thirty days in two or more newspapers for the work to be done and for material to be used therein, with the right to reject any and all bids, and shall enter into contracts with the lowest responsible bidders thereon and secure competent persons, if deemed advisable, to superintend the construction and counsel and advise in matters relating thereto.