[Code of Federal Regulations] [Title 40, Volume 13] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR63.7186] [Page 64] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES--Table of Contents Subpart BBBBB_National Emission Standards for Hazardous Air Pollutants for Semiconductor Manufacturing Sec. 63.7186 By what date must I conduct performance tests or other initial compliance demonstrations? For each process vent or storage tank vent emission limitation in Sec. 63.7184 for which initial compliance is demonstrated by meeting a percent by weight HAP emissions reduction, or a HAP concentration limitation, you must conduct performance tests or an initial compliance demonstration within 180 days after the compliance date that is specified for your source in Sec. 63.7183 and according to the provisions in Sec. 63.7(a)(2).