S.C. Code Ann. § 48-57-45

In order to assert at any time in the future the privilege established in Section 48-57-30, the facility conducting the environmental audit shall, upon inspection by the department of the facility or no later than ten working days after completion of the department's inspection, notify the department of the existence of any audit relevant to the subject of the department's inspection as well as the beginning date and completion date of that audit. A responsible official from the facility or company shall certify by his or her signature in writing on the cover of the audit report the beginning date, the anticipated completion date, and the actual completion date of the audit.