40 CFR §63.7182

1. (a)This subpart applies to each new, reconstructed, or existing affected source that you own or operate that manufactures semiconductors.
2. (b)An affected source subject to this subpart is the collection of all semiconductor manufacturing process units used to manufacture p-type and n-type semiconductors and active solid-state devices from a wafer substrate, including research and development activities integrated into a semiconductor manufacturing process unit. A semiconductor manufacturing process unit includes the equipment assembled and connected by ductwork or hard-piping including furnaces and associated unit operations; associated wet and dry work benches; associated recovery devices; feed, intermediate, and product storage tanks; product transfer racks and connected ducts and piping; pumps, compressors, agitators, pressure-relief devices, sampling connecting systems, open-ended valves or lines, valves, connectors, and instrumentation systems; and control devices.
3. (c)Your affected source is a new affected source if you commence construction of the affected source after May 8, 2002, and you meet the applicability criteria in § 63.7181 at the time you commence construction.
4. (d)Your affected source is a reconstructed affected source if you meet the criteria for “reconstruction,” as defined in § 63.2.
5. (e)Your source is an existing affected source if it is not a new or reconstructed affected source.