S.C. Code Ann. § 23-13-210

Upon a written statement of the president, treasurer or other executive officer having the management of any industrial corporation located in any county of this State directed to the sheriff of such county, setting forth that in his opinion the interests of the industrial community and locality under his management require special police supervision, and that such community contains fifty or more inhabitants, the sheriff shall appoint as his deputy a discreet and suitable person satisfactory to the president, treasurer or other executive officer of the corporation requesting the appointment, who shall reside within the county in which is situate the property for whose protection he is appointed.