[Code of Federal Regulations] [Title 40, Volume 5] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR58.12] [Page 209] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 58--AMBIENT AIR QUALITY SURVEILLANCE--Table of Contents Subpart B--Monitoring Criteria Sec. 58.12 Siting of instruments or instrument probes. Appendix E to this part contains criteria for siting instruments or instrument probes for SLAMS.