[Code of Federal Regulations] [Title 40, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR51.190] [Page 239] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 51--REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS--Table of Contents Subpart J--Ambient Air Quality Surveillance Sec. 51.190 Ambient air quality monitoring requirements. Authority: Secs. 110, 301(a), 313, 319, Clean Air Act (42 U.S.C. 7410, 7601(a), 7613, 7619). The requirements for monitoring ambient air quality for purposes of the plan are located in subpart C of part 58 of this chapter. [44 FR 27569, May 10, 1979]