Any proposed new or expanded treatment facility in the Inks Lake or Lake Buchanan watersheds, but outside the Inks Lake or Lake Buchanan water quality areas may be permitted only if it provides for disposal without discharge in accordance with §311.13 of this title (relating to Wastewater Disposal) or if the applicant establishes that any alternative proposed wastewater treatment and disposal will consistently protect and maintain the existing water quality of Inks Lake and Lake Buchanan.