[Code of Federal Regulations] [Title 40, Volume 22] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR146.21] [Page 775] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 146_UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS--Table Subpart C_Criteria and Standards Applicable to Class II Wells Sec. 146.21 Applicability. This subpart establishes criteria and standards for underground injection control programs to regulate Class II wells.