(a) This subpart applies to each polyvinyl chloride and copolymers production affected source.

(b) The polyvinyl chloride and copolymers production affected source is the facility wide collection of PVCPU, storage vessels, heat exchange systems, surge control vessels, wastewater and process wastewater treatment systems that are associated with producing polyvinyl chloride and copolymers.

(c) An existing affected source is one for which construction was commenced on or before May 20, 2011, at a major source.

(d) A new affected source is one for which construction is commenced after May 20, 2011, at a major source.

(e) If components of an existing affected source are replaced such that the replacement meets the definition of reconstruction in § 63.2 and the reconstruction commenced after May 20, 2011, then the existing affected source becomes a reconstructed source and is subject to the relevant standards for a new affected source. The reconstructed source must comply with the requirements for a new affected source upon initial startup of the reconstructed source or by April 17, 2012, whichever is later.