For purposes of this section, "vulnerable zone" is defined as a circle, the center of which is within the boundaries of a facility possessing hazardous, toxic, flammable, radioactive, or infectious materials subject to this section, and the radius of which is that distance a hazardous, toxic, flammable, radioactive, or infectious cloud, overpressure, radiation, or radiant heat would travel before dissipating to the point it no longer threatens serious short-term harm to people or the environment.
Disclosure of information pursuant to this subsection must be by means that will prevent its removal or mechanical reproduction. Disclosure of information pursuant to this subsection must be made only after the custodian has ascertained the person's identity by viewing photo identification issued by a federal, state, or local government agency to the person and after the person has signed a register kept for the purpose.
S.C. Code § 30-4-45