Subchapter II. Dulles International Airport Sanitary Sewer. § 34–2131. Commissioner authorized to develop plan for interceptor and sewer line. § 34–2132. Potomac interceptor — Plans, construction, operation, and maintenance; charges for use. § 34–2133. Potomac interceptor — Appropriations. § 34–2134. Potomac interceptor — Acquisition of land in Maryland or Virginia; transfer of land from department or agency of United States.