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 § 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]