[Code of Federal Regulations] [Title 40, Volume 5, Parts 53 to 59] [Revised as of July 1, 2000] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR58.33] [Page 215] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY PART 58--AMBIENT AIR QUALITY SURVEILLANCE--Table of Contents Subpart D--National Air Monitoring Stations (NAMS) Sec. 58.33 NAMS methodology. Each NAMS must meet the monitoring methodology requirements of appendix C to this part applicable to NAMS at the time the station is put into operation as a NAMS.