40 CFR § 147.1953
Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells authorized by rule
June 9, 2020
Maximum injection pressure. The owner or operator shall limit injection pressure to the lesser 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 = (0.733 − 0.433 Sg)d
where:
Pm = injection pressure at the well head in pounds per square inch
Sg = specific gravity of injection fluid (unitless)
d = injection depth in feet.
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