[Code of Federal Regulations]
[Title 40, Volume 21]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR147.753]

[Page 752]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 147_STATE UNDERGROUND INJECTION CONTROL PROGRAMS--Table of Contents
 
                            Subpart P_Indiana
 
Sec. 147.753  Existing Class I and III wells authorized by rule.

    Maximum injection pressure. The owner or operator shall limit 
injection pressure to the lessor of:
    (a) A value which will not exceed the operating requirements of 
Sec. 144.28(f)(3) (i) or (ii) as applicable; or
    (b) A value for well head pressure calculated by using the following 
formula:

Pm=(0.800-0.433 Sg)d

where:

Pm=injection pressure at the wellhead in pounds per square inch
Sg=specific gravity of injected fluid (unitless)
d=injection depth in feet.

[49 FR 20197, May 11, 1984, as amended at 56 FR 41072, Aug. 19, 1991]