[Code of Federal Regulations] [Title 40, Volume 30] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR1065.305] [Page 663] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents Subpart D_Analyzer and Equipment Calibrations Sec. 1065.305 International calibration standards. (a) You may ask to use international standards for calibration. (b) You need not ask for approval to use standards that have been shown to be traceable to NIST standards.