S.C. Code § 13-7-840
The council shall consist of nine members. One at-large member shall be appointed by the Speaker of the House of Representatives and one at-large member shall be appointed by the President of the Senate. Seven members shall be appointed by the Governor as follows: two shall be actively involved in the area of environmental protection; one shall have experience in the generation of power by nuclear means; one shall have experience in the field of nuclear activities other than power generation; two shall be scientists or engineers from the faculties of institutions of higher learning in the State; and one shall be from the public at large. The terms of the members of the council appointed by the Governor shall be coterminous with that of the appointing Governor, but they shall serve at the pleasure of the Governor.
Vacancies of the council shall be filled in the manner of the original appointment.
S.C. Code § 13-7-840