[Code of Federal Regulations]
[Title 40, Volume 20]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR144.23]

[Page 637]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 144_UNDERGROUND INJECTION CONTROL PROGRAM--Table of Contents
 
        Subpart C_Authorization of Underground Injection by Rule
 
Sec.  144.23  Class IV wells.

    (a) Injection into existing Class IV wells is authorized for up to 
six months after approval or promulgation of the UIC Program. Such wells 
are subject to the requirements of Sec. Sec.  144.13 and 144.14(c).
    (b) Closure. For EPA administered programs only,
    (1) Prior to abandoning any Class IV well, the owner or operator 
shall plug or otherwise close the well in a manner acceptable to the 
Regional Administrator.
    (2) [Reserved]
    (3) The owner or operator of a Class IV well must notify the 
Regional Administrator of intent to abandon the well at least thirty 
days prior to abandonment.
    (c) Notwithstanding the requirements of paragraphs (a) and (b) of 
this section, injection wells used to inject contaminated ground water 
that has been treated and is being injected into the same formation from 
which it was drawn are authorized by rule for the life of the well if 
such subsurface emplacement of fluids is approved by EPA, or a State, 
pursuant to provisions for cleanup of releases under the Comprehensive 
Environmental Response, Compensation, and Liability Act of 1980 
(CERCLA), 42 U.S.C. 9601-9675, or pursuant to requirements and 
provisions under the Resource Conservation and Recovery Act (RCRA), 42 
U.S.C. 6901-6992k.

[49 FR 20181, May 11, 1984, as amended at 60 FR 33932, June 29, 1995; 64 
FR 68566, Dec. 7, 1999]