[Code of Federal Regulations] [Title 40, Volume 19] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR146.21] [Page 708] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 146--UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS--Table of Contents 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.