but for purposes of subsection (b) of this Code section the count of landfills shall not include any permit by rule inert waste landfill or any private industry solid waste disposal facility; and in counting landfills each existing landfill site shall be counted only once even if such landfill site has previously been expanded under a new or existing permit, provided the facilities under each new or existing permit are the same type landfill, are owned by the same person, and are contiguous or if not contiguous are separated only by the width of a public road.
OCGA § 12-8-25.4